B Vitamins and Coenzymes - What are the health benefits of these nutritional supplements?
The B vitamins include:
B vitamin 1 -- Thiamin Cocarboxylase
B vitamin 2 -- Riboflavin Flavin Mono Nucleotide
B vitamin 3 -- Niacin
Nicotinamide NADH
B Vitamin 5 -- Pantothenic acid Pantothene
B vitamin 6 -- Pyridoxine
Pyridoxal Phosphate
vitamin
Vitamin-B12 -- Cyanocobalamin or
Methylcobalamin or Dibencozide (B12)
What you will find on this page:
B
Vitamin
information
MultiVit Rx with B vitamins - formulated by Ray Sahelian, M.D.
B Vitamin coenzyme complex product
Mind Power Rx for healthy memory and mood -
formulated by Ray Sahelian, M.D.
B Vitamins - Coronary Heart
Disease - FDA allows this qualified health claim
"It is known that diets low in saturated fat and cholesterol may reduce
the risk of heart disease. The scientific evidence about whether folic acid (folate),
vitamin B6, and vitamin B12 may also reduce the risk of heart disease and other
vascular diseases is suggestive, but not conclusive. Studies in the general
population have generally found that these vitamins lower homocysteine, an amino
acid found in the blood. It is not known whether elevated levels of homocysteine
may cause vascular disease or whether high homocysteine levels are caused by
other factors. Studies that will directly evaluate whether reducing homocysteine
may also reduce the risk of vascular disease are not yet complete."
"As part of a well-balanced diet that is low in saturated fat and cholesterol,
Folic Acid, Vitamin B6 and Vitamin B12 may reduce the risk of vascular disease.
FDA evaluated the above claim and found that, while it is known that diets low
in saturated fat and cholesterol reduce the risk of heart disease and other
vascular diseases, the evidence in support of the above claim is inconclusive."
MultiVit Rx - Lasts 2 to 4 months
- with B vitamins
High Quality Daily Vitamins and Minerals
Developed by Ray Sahelian, M.D.

Manufactured by a FDA-approved and GMP-certified facility.
MultiVit Rx Supplement Facts:
Serving Size: 4 Capsules
Servings per Bottle: 30
Amount per Serving: %DV
Vitamin A - 10,000 IU - 200%
Beta Carotene - 7,500 IU
Retinyl Palmitate - 2,500 IU
Vitamin C with Rose hips (ascorbic acid)
Vitamin D
Vitamin-E (mixed tocopherols)
Vitamin B-1 (thiamine hcl)
Vitamin B-2 (riboflavin)
Niacinamide
Vitamin B-6
Folic acid
Vitamin B12
Biotin vitamin B
Pantothenic acid (d-calcium pantothenate)
Calcium (citrate)
Iodine (potassium iodine)
Magnesium (oxide)
Zinc (oxide)
Selenium (amino acid chelate)
Copper (amino acid chelate)
Manganese (carbonate)
Molybdenum (amino acid chelate)
Potassium (carbonate)
Green Tea (leaves)
N-Aceytl-L-Cysteine
Inositol
PABA (para aminobenzoic acid)
Rutin
Citrus Bioflavonoid Complex
Choline (bitartrate)
Betaine (HCI)
Lycopene (from tomato)
Lutein (from marigold extract)
Zeaxanthin
Octacosanol
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Coenzymated B Vitamin Complex

B Vitamin coenzyme is an activated and more
powerful form of Vitamin B complex.
B Vitamin Supplement Facts:
Amount Per Serving
Vitamin C - 9 mg - 15%DV
Thiamin - 6 mg - 430%DV
[Coenzymated B vitamin 1]
Riboflavin - 6 mg - 330%V
[Coenzymated B vitamin 2]
Niacin - 20 mg - 100%DV
(from inositol 34 mg, niacinamide ascorbate 30 mg, nicotinamide adenine
dinucleotide 10 mg [Coenzymated])
Vitamin B 6 - 5 mg - 250%DV
(from 15 mg pyridoxal -5-phosphate [Coenzymated])
Folate (as folic acid) - 200 mcg - 50%DV
Vitamin B12 - 340 mcg - 5,000%DV
(from 1 mg dibencozide [Coenzymated])
Biotin vitamin - 75 mcg - 25%DV
Pantothenic Acid - 13 mg 125%DV
(as calcium D-Pantothenate)
Coenzyme Q10 (ubiquinone)
- 6 mg
Inositol (inositol hexanicotinate) - 4 mg
Suggested Use: 1 tablet daily, or as directed by your health professional. Place tablet under the tongue and allow to dissolve slowly, altering the position of the tablet to avoid prolonged contact with the same area.
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B vitamins, and
their practical interpretation by Ray Sahelian, M.D.
Mind Power Rx - Formulated by Ray Sahelian, M.D.
Mind Power Rx is a sophisticated cognitive formula
with B vitamins and a dozen brain herbs and nutrients. It combines a delicate
balance of brain circulation agents and neurotransmitter precursors with
powerful natural brain chemicals that support healthy:
• Memory
• Mental clarity
• Concentration
• Alertness and Focus
The herbs in Mind Power Rx include: Ashwagandha, Bacopa, Fo-Ti,
Ginkgo biloba, Ginseng, Gotu Kola, Mucuna pruriens, Reishi,
and
Rhodiola.
The nutrients and vitamins in Mind Power Rx include
Acetyl-l-carnitine,
Carnitine, Carnosine,
Choline,
DMAE, Inositol, Methylcobalamin, Pantothenic
acid, Trimethylglycine, Tyrosine, and
Vinpocetine.
Benefits of B Vitamins
Since B vitamins and their coenzymes play important metabolic roles in numerous
biochemical reactions throughout the body, they can influence just about every aspect of
brain and physical health. As a rule, individuals who take B vitamins notice improvements
in:
Mood and energy
Alertness
Learning and memory
Speed of thinking
Verbal fluency
Concentration and focus
Visual clarity
Which Clinical Conditions are B vitamins
involved in?
Because of their wide range of effects, B vitamins and their coenzymes can potentially
play a role in:
Depression
Age related cognitive decline
Anxiety disorders
Addiction disorders
Chronic fatigue
Alzheimers disease
Parkinsons disease
The Bs in the Brain Get an A
B vitamins help in energy production and deficiencies lead to fatigue and poor mental
functioning. The increased consumption of refined foods has decreased the amounts of B
vitamins present in our diet. However, on the positive note, small amounts of B vitamins
are regularly added to some food products, such as cereals. The question of whether B vitamin supplementation is necessary in healthy individuals
who have a normal diet has been debated ever since vitamins were discovered. The results
of several studies over the past few years have influenced my decision in favor of low
dose supplementation. There can be cognitive improvements from taking B vitamins. Back in
1995, Dr. D. Benton and colleagues, from the University College Swansea, in Great Britain,
gave ten times the recommended daily allowance of nine vitamins (mostly the B vitamins) to
healthy college students (Benton 1995). The study lasted for one year. The students
reported improvement in mood and feeling more agreeable. There was also an improvement in
cognitive functioning, especially in regards to concentration. Many of my patients
consistently report that B vitamin supplementation improves their energy, concentration
and mood while helping them handle everyday stress better.
For otherwise healthy individuals, supplementation with one to three times the
recommended daily allowance of the B vitamins is suggested. Higher dosages may be required
for individuals with medical, psychiatric, or neurological disorders.
Understanding Coenzymes
In the past few years, many of the B vitamins have become available in their more
activated forms known as coenzymes. For instance, the B vitamin niacin is now
available in a coenzyme form known as NADH. An enzyme is basically a protein that promotes
chemical changes in other substances, itself remaining unchanged in the process. A
coenzyme is a substance that facilitates or is necessary for the action of an enzyme.
The brain, just like a car, needs fuel. Our primary source of fuel is through fats, proteins, and carbohydrates in the diet. After digestion in the stomach, foodstuffs are absorbed into the bloodstream and circulate to various tissues and cells where they are broken down into even smaller particles. One of these particles is a two-carbon molecule known as acetyl. Enzymes help break down these fats, proteins, and carbohydrates into acetyl and they then help extract the final energy from acetyl through a process called the Krebs cycle, named after the German biochemist who defined it. This energy is in the form of ATP (adenosine triphosphate). Enzymes also need helpers, and these helpers are called coenzymes. Most of the coenzymes in the body are partly made from vitamins, such as vitamins E, C, lipoic acid, and riboflavin (vitamin B2).
The coenzyme form of a B vitamin often has a significantly more powerful effect than a
regular B vitamin. The coenzyme forms of the B vitamins are an exiting addition to the
field of nutrition. It is quite possible that the elderly or certain individuals with a
particular biochemical deficiency may not be able to make adequate amounts of the coenzyme
forms of the B vitamins despite adequate intakes of the individual B vitamins. Hence, the
coenzyme forms should be seriously considered in those who do not respond to the regular B
vitamins. Some companies include most of the Bs in their coenzyme form together in one
pill. I think these products deserve serious consideration, especially for their use in
the middle aged and the elderly.
The Individual B Vitamins and Their Coenzymes:
Thiamin (B1) is necessary for the metabolism of carbohydrates and amino acids to adenosine triphosphate (ATP), the primary source of energy in the human body. Thiamin is found in good amounts in milk, lean pork, legumes, rice bran, and the germ of cereal grains, but is lost during food processing and cooking. The current recommended daily allowance (RDA) by government advisory panels is about 1.5 mg.
Studies indicate that supplementation with thiamin provides cognitive benefits. Dr. Benton and colleagues gave 50 mg of thiamin daily to young adult females for a period of two months (Benton 1997). The women reported being more clearheaded, composed, and energetic. The taking of thiamin had no influence on memory but reaction times were faster following supplementation. Prior to taking the thiamin, the women had normal blood levels of this vitamin.
Researchers at Princess Margaret Hospital in Christchurch, New Zealand, measured thiamin levels in elderly individuals before giving them 10 mg of the vitamin a day (Wilkinson 1997). Only the subjects with low thiamin concentrations showed benefits. They had an improvement in quality of life with more energy and deeper sleep, along with decreased blood pressure and weight.
Thiamin is now sold in its coenzyme form called cocarboxylase or thiamin pyrophosphate (TPP). Human studies giving TPP to evaluate cognitive functioning have not yet been published. See also Benfotiamine.
Food sources for thiamne B vitamin % of daily need
Thiamin (vitamin B1)
Pork, lean, broiled (3 oz.) 73%
Beef liver, braised (3 oz.) 18%
Enriched corn tortilla (1) 18%
Enriched rice, cooked (1/2 cup) 18%
Whole-grain bread (1 slice) 9%
Riboflavin (B2) is a yellow-colored nutrient involved in dozens of metabolic pathways leading to energy production and the making of fatty acids and sterols. Good sources are lean meats, eggs, milk, some vegetables and enriched cereals. The recommended daily intake is about 1.5 mg. You may notice your urine turning a deeper yellow color after taking riboflavin.
Riboflavin is part of two larger activated coenzymes known as flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN). FMN is now available as a supplement. One product contains 25 mg of FMN per pill. Human studies giving FAD or FMN in order to evaluate cognitive functioning have not yet been published.
Food Sources for B Vitamin Riboflavin
Riboflavin (vitamin B2)
Beef liver, braised (3 oz.) 318%
Yogurt, fat-free, (1 cup) 36%
Milk, fat-free (1 cup) 18%
Niacin (B3), also known as nicotinamide and nicotinic acid, plays essential roles
in a large number of energy pathways. Perhaps as many as 200 enzymes are dependent on this
nutrient. Nicotinamide is part of the coenzyme known as nicotinamide adenine dinucleotide (NADH),
which is sold as a supplement. I will discuss NADH later in this chapter since several
studies have been published regarding this coenzyme. Good sources of niacin are meats,
legumes, fish, and some nuts and cereals. The recommended daily intake is about 15 to 20
mg.
High intake of niacin, particularly from food
sources, may reduce the risk of Alzheimer's disease and age-related cognitive
decline.
Food Sources for Niacin B Vitamin
Niacin
Turkey breast, roasted, (3 oz.) 43%
Peanut butter (2 tbsp.) 29%
Codfish, cooked (3 oz.) 14%
Enriched corn tortilla (1) 11%
Pyridoxine (B6), also known as pyridoxal, is widely available in most foods including vegetables, legumes, nuts, seeds, and animal products. The coenzyme form of pyridoxine is pyridoxal phosphate (PLP) and at least 100 different metabolic reactions are helped by PLP. PLP is a necessary co-enzyme in the production of brain chemicals: It helps the conversion of 5-HTP into serotonin, tyrosine into dopamine and norepinephrine, and the production of other neurotransmitters such as histamine and GABA. The recommended daily intake is about 1.5 mg. Deficiencies in B6 can lead to low mood.
Human studies with PLP in mood disorders and depression have not yet been published. PLP is available in pills ranging from 5 to 20 mg. Some individuals notice the difference between regular B6 and the coenzyme form. Joan, a 53-year old patient from Beverly Hills, California, says, "I've taken good quality B vitamins for a few years. Recently I tried the pyridoxal phosphate form of B6. It really has increased my energy, mood, and alertness."
Food Sources B Vitamin Pyridoxine
Pyridoxine (vitamin B6)
Chicken, light meat, (3 oz.) 33%
Pork, loin, roasted (3 oz.) 33%
Pantothenic acid (B5) is essential for biological reactions involving acetylation and energy production. This vitamin helps in the formation of acetylcholine, the metabolism of fatty acids, and the incorporation of fatty acids into cell membrane phospholipids. Pantothenic acid is also involved in making steroid hormones, vitamin A, vitamin D, and cholesterol. Good sources are egg yolk and fresh vegetables. The recommended daily intake is about 5 mg. Pantothenic acid is sold over the counter in dosages ranging from 5 to 250 mg.
My patients report that pantothenic acid helps improve their mood and energy. Personally, I notice an improvement in alertness, concentration, energy, and visual clarity with dosages ranging from 100 to 250 mg. I do experience insomnia, though, when I take more than 250 mg, even if I take it in the morning. Benita von Klingspor, a nutritionist in Marina Del Rey, California, says, "Pantothenic acid is one of my favorite nutrients. I know the effects of this nutrient extremely well since Ive been taking 100 to 250 mg most mornings for more than thirty years. I often recommend it to many clients with low energy. Pantothenic acid increases their alertness and focus, improves their mood, and enhances their joy in life. They begin to have more interest in whatever theyre doing. However, if people take too much pantothenic acid, they can become overstimulated, wired, and easily aggravated."
Pantothenic acid is available in its activated form known as pantethine. Pantethine, itself, is part of coenzyme A, a very important substance that participates in the metabolism of carbohydrates, amino acids, fatty acids and dozens of other important chemical reactions. Cognitive effects of oral pantethine administration to humans have not been published. Pantethene is sold over the counter in dosages ranging from 5 to 50 mg. In my experience, a lower dosage of pantethine provides similar effects as a higher dosage of pantothenic acid.
Folic acid, also known as folate, generally functions in cooperation with vitamin
B12 in many metabolic reactions, including the synthesis of DNA. Folic acid helps reduce
levels of homocysteine, a substance that can increase the risk for atherosclerosis. This vitamin functions as a methyl donor. Folic acid is
found in almost all foods and the recommended daily intake is about 400 micrograms. The
coenzyme form of folate is called tetrahydrofolate. Folate and other B vitamins seem even more of a wonder drug
than anyone suspected: Already known to prevent severe birth defects and heart
attacks, they may also ward off broken bones from osteoporosis, two major
studies suggest.
Folate is a water-soluble B-vitamin and enzymatic cofactor that is
necessary for the synthesis of purine and thymidine nucleotides and for the
synthesis of methionine from homocysteine. Impairment of folate-mediated
one-carbon metabolic pathways can result from B-vitamin deficiencies and/or
single nucleotide polymorphisms, and increases risk for pathologies, including
cancer and cardiovascular disease, and developmental anomalies including neural
tube defects.
New research hints that a suboptimal intake of folic
acid may play a role in the development of colorectal cancer, which points to a
possible role for folic acid supplementation in colorectal cancer prevention. In
individuals with colorectal adenomas -- polyps that can be precursors to bowel
cancer -- folic acid supplementation reverses so-called DNA hypomethylation.
Food Sources for B Vitamin Folic Acid
Folate (folic acid)
Fortified cereals (1 cup) 25-100%
Spinach, boiled (1/2 cup) 33%
Navy beans, boiled (1/2 cup) 31%
Orange juice (1 cup) 28%
Asparagus, boiled (4 spears) 21%
Wheat germ (1/4 cup) 20%
Avocado (1/2) 14%
Cobalamin - vitamin B12
Methylcobalamin, or cyanocobalamin, has a number of important roles in metabolism,
including the synthesis of DNA. This function is particularly crucial when it comes to
making new red blood cells. Hence, a deficiency of B12 leads to anemia. The formation of
myelinthe white sheath surrounding nervesis partly dependent of B12.
Deficiencies in B12 intake lead to nerve damage, memory loss, poor coordination, low mood,
and mental slowness. This nutrient, along with folic acid and B6, helps lower levels of
homocysteine. High homocysteine levels are suspected in being one of the factors causing
hardening of the arteries.
The recommended daily intake of B12 is about 3 micrograms, but much higher dosages are well tolerated. B12 is found mostly in meats and fish. Vegetarians can become deficient in this vitamin if they dont take supplements. B12 deficiency can occur in the elderly due to malabsorption from the intestinal tract. If you have gastritis, absorption problems, autoimmune disorders, insulin dependent diabetes, certain thyroid disorders, or take antacids and other medicines that reduce stomach acid, you could have problems in maintaining adequate B12 levels. Hence, monthly B12 shots, in a dose of 1mg (1,000 micrograms), could well provide you with positive cognitive benefits. Sublingual forms of B12 are also available.
There are two coenzyme forms of B12, adenosylcobalamin and methylcobalamin.
Adenosylcobalamin is sold over the counter as dibencozide, in a dose of 10,000 micrograms,
which is a large dose. Human studies evaluating its role in cognitive disorders have not
been published. Its quite possible that with age, nutritional deficiencies, or
enzyme deficiencies, some individuals may not be able to convert B12 into its coenzyme
forms.
Vitamin B12 deficiency can often be treated with oral supplements instead of
giving an injection. B12 deficiency is common in patients with reduced acid secretion
because acid is required to release cobalamin from food. But these patients can absorb
oral supplements because the cobalamin is in the crystalline form and not bound to food.
Treatment of pernicious anemia can be done with oral B!2 at 1000 mcg per day.
Mothers with low levels of vitamin B12
in their blood are at increased risk of having an infant with spina bifida -- a
birth defect in which the spinal cord fails to form properly. Based on previous
research, pregnancy guidelines recommend that women consume enough folic acid to
reduce the risk of spina bifida and related problems. The new findings suggest
that these guidelines should also include recommendations about vitamin B12.
Oral supplements of vitamin B12 appear to correct vitamin B12 deficiencies as well as B12 injections. However, the group of European researchers found that, in order to correct a deficiency, oral doses need to contain more than 200 times the recommended daily allowance (RDA) of vitamin B12. Study author Dr. Lisette C. P. G. M. de Groot of Wageningen University in the Netherlands explained that most people develop vitamin B12 deficiencies as a result of "malabsorption," in which their bodies become unable to extract vitamin B12 from food. The deficiency typically strikes older people, she added, and takes years to develop. In some instances, people who avoid animal products -- such as vegans and followers of a macrobiotic diet -- can also develop a deficiency in vitamin B12 as a result of not eating enough B12-rich foods. A vitamin B12 deficiency is typically treated by monthly, often painful, shots. To investigate whether an oral dose of vitamin B12 works, as well, they tested various daily doses of oral vitamin B12 supplements in 120 people aged 70 and older. They found that daily oral doses of 647 to 1032 micrograms of vitamin B12 appeared to correct the deficiency. The current RDA for vitamin B12 is 3 micrograms per day. SOURCE: Archives of Internal Medicine, May 23, 2005.
Food Sources for B12 B Vitamin
B12
Salmon, cooked (3 oz.) 125%
Beef tenderloin, broiled (3 oz.) 90%
Yogurt, fat-free (1 cup) 58%
Shrimp, cooked (3 oz.) 54%
Milk (1 cup) 38%
Biotin is involved in the metabolism of carbohydrates and fats. It is widely
available in foods, particularly egg yolk, soybeans, cereal, legumes, and nuts. Bacteria
in the gut also make it. The RDA ranges from 30 to 100 micrograms.
A study from Switzerland demonstrated
a 25 percent increase in nail plate thickness in patients with brittle nails who
received biotin supplementation. Analysis of all visits to a nail consultation
practice over a six-month period revealed forty-four patients with this
condition who had been prescribed the B-complex vitamin biotin. Of these,
thirty-five who took daily supplementation were subjectively evaluated.
Twenty-two of thirty-five (63 percent) showed clinical improvement and thirteen
(37 percent) reported no change in their condition. The results of this small,
retrospective study suggest a positive response to biotin in the treatment of
brittle nails in some patients.
Food Sources for Biotin B Vitamin
Biotin
Egg, large (1) 33%
Wheat germ (1/4 cup) 20%
Oatmeal, cooked (1/4 cup) 17%
Recommendations
All of the B vitamins are important and supplementation would probably benefit most
everyone. For healthy individuals, taking one to three times the RDA of the Bs would be
sufficient. You will find B complex supplements that say B50 or B100 on the label. This
means that many of the B vitamins, such as thiamin and riboflavin, are found in dosages of
50 or 100 mg per pill. The RDA for thiamin and riboflavin is about 1.5 mg. The average,
healthy person does not need to take these high dosages. However, biochemical
individuality certainly does exist. Dr. David Benton, Ph.D., who researches the influence
of B vitamins on cognition says, "There can be enormous differences in the needs of
vitamins. It wouldnt be unusual for some individuals requiring 20 times the amount
of a particular vitamin compared to others in a similar age group."
A Daily Dose of B Vitamins Keeps the Cardiologist Away
Scientists at the University of Michigan in Ann Arbor say that people might
live longer if they take daily multivitamins containing recommended doses of the
B vitamins
folic acid and B12. Both nutrients help lower blood levels of homocysteine - a common substance
found in the body that can harm blood vessel walls and encourage blood clotting
and hardening of the arteries. Up to 10% of all heart deaths are thought to be
associated with high levels of homocysteine. Clinical trials have not yet
demonstrated precisely how much benefit can be derived from lowering levels of
the substance, but even a small amount of benefit would make it worth taking
vitamins. A computer analysis looked at the hypothetical balance between cost
and benefit under several different scenarios, based on what is known about
homocysteine and the effects of folic acid and vitamin B12. One scenario assumed
that reducing homocysteine levels could reduce heart disease risk linked to the
substance by 40%. The team found that in this situation about eight life-years
could be saved per 1,000 men, and almost four life-years per 1,000 women. It did not matter if vitamins were given to all at-risk people, or just those
with elevated homocysteine blood levels.
Dr. Sahelian says: Homocysteine is
gradually becoming accepted as another risk factor similar to high cholesterol
levels in causing hardening of the arteries. A daily dose of folic acid and B12,
in amounts normally found in a multivitamin supplement, can make a significant
impact in reducing a person’s risk from heart disease.
Email Questions and comments about B vitamins
Q. I should appreciate if you could
comment on this NORVIT investigation: Researchers from Norway have found that treating
patients who have had a heart attack with high doses of B vitamins does not
lower the risk of getting another heart attack or stroke. Contrary to
expectations, B vitamins may do more harm than good. These surprising data were
presented at the Hot Line Session II of the European Society of Cardiology
Congress in Stockholm on 5th September 2005. NORVIT, the Norwegian Vitamin
Trial, is the first trial to examine whether high doses of B vitamins prevent
recurrent heart disease in patients who have had a myocardial infarction. A
total of 3749 patients were recruited from 35 Norwegian hospitals. The patients
were assigned to take B vitamins or placebo for more than three years in
addition to standard treatments after a heart attack. Professor Kaare Harald
Bnaa MD, University of Troms, Norway, principal investigator of the NORVIT
trial, comments, "The results of the NORVIT trial are important because they
tell doctors that prescribing high doses of B vitamins will not prevent heart
disease or stroke. B vitamins should be prescribed only to patients who have B
vitamin deficiency diseases." The participants in the NORVIT trial were divided
at random into four groups that received either 0.8 mg folic acid (a B vitamin)
per day, 40 mg vitamin B-6 per day, both 0.8 mg folic acid and 40 mg vitamin B-6
per day, or a placebo capsule per day. Those who took folic acid or vitamin B-6
alone had a small increase in the risk of cardiovascular disease. However, among
those who took both vitamins the risk increased by 20 percent.
A. Thank you for bringing this B vitamin study to our
attention. I really find it strange that they would waste all this money and
time on a ill-thought out study. If they are going to give the B vitamins, why
pick one or two in high doses and skip the rest? I would much rather they had
given one or two times the RDA for all the B vitamins rather than 40 mg of B6
which is about 20 times the RDA while not giving B vitamins such as B1, B2,
niacin, pantothenic acid, B12, biotin, etc.
So, this study means little except that people should
not take a high dose of one B vitamin at the expense of the other B vitamins.
And the researchers should go back to school and learn the basics of nutrition
and biochemistry before wasting time, effort, and money on an ill-conceived
study.
Q. I purchased a product Vitamin-B-Coenzyme-Complex just 3 weeks back. I am having
very good results at 2 tabs/per day. i have a doubt regarding the dosage. the
product contains NADH-5mg/tablet. the dosage for NADH in the book mind boosters
(by dr ray sahelian) is to take 2.5-5mg of NADH only a few times a week. whereas
the the bottle indicates to take 2-3 tablets daily. (which is NADH-10/15 per
day). Please let me know about the safe dosage of the product
Vitamin-B-Coenzyme-Complex for daily use .
A. We believe 1 tablet of B coenzyme a few times a week is sufficient.
However each person is different. Some need more, others less. I prefer people
use less rather than more.
Q. Do you think testing for homocysteine blood
level is important?
A. I'm not really sure
homocysteine
levels need to be checked since taking a B vitamin complex will lower them
anyway. We do so many blood tests in this country, and medical expenses
are skyrocketing. Why not just take a cheap B vitamin complex? That' s my
opinion, another doctor may disagree.
Q. I've just purchased some Sam-e for depression as
I experience too many side-effects with anti-depressants. I have read that it is
wise to take additional B vitamins, particularly B6, B12 and folic acid, when
taking Sam-e in order to prevent toxic build-up of homocysteine. Apparently
these vitamins assist in the breakdown of homocysteine which is formed when
Sam-e breaks down.
A. We're not totally sure whether extra B vitamins are
needed if someone is taking SAM-e. Perhaps it depends on one's diet and
biochemistry. It would not hurt to take 1 to 3 times the RDA of the B vitamins.
Q.
Interestingly, I took a B vitamin coenzyme
complex you recommend on your site and I believe I feel a boost in energy,
mental clarity, alertness & elevated mood. I went out to lunch w/ folks from the
office and had quite a heavy meal: cheese burger w/ Lousiana sausage, some fries
& a very heavy beer. I anticipated falling asleep at my desk after lunch, but I
haven't really been dragging at all. This is great, I hope the effects continue!
Thanks for your web site for encouraging me to start up with this stuff.
Q. You mention in your new book "Mind Boosters" about finding a B vitamin
that has five to ten times the RDA amount for B vitamins. Then you mention
finding another B vitamin complex that has 2 to 3 times the RDA. I have looked
all over the place for B vitamin complexes with these amounts and have come up
short. Do you have any name brands or generic brand b-complexes that you could
refer me to with these amounts. Most B-complexes on the market seem to be B-50's
or B-100's or B-25's but nothing of the dose your recommending. Thanks.
A. Yes, it's hard to find a
B complex that's reasonable in
its content. You may consider getting a multivitamin complex that has 1-5 times the RDA,
or, get a B-25 and take about a quarter of a pill.
Q. Today in my local paper I read that excessive doses of pyroxidine HCL (Vitamin B6) over protracted periods of time can cause serious damage to
the nervous system. The paper said for a person like myself (female 31 yrs) I should be
getting 1.3 mg a day.
A. B6 may cause problems in doses greater than 50 or 100 mg
when taken over several months, but it is unlikely that lower doses cause any immediate or
significant problems.
Q. Since B vitamins are water-soluble, how can one
take "too much"? And, if they can be counter-productive, how?
A. Even though B vitamins are water soluble, they could
still have a physiologic effect before they are excreted, and perhaps taking too
much can throw off delicate body biochemistry for a while until the B vitamins are
excreted.
Q. I'm wondering about the benefits of taking so
called "stress" formula B vitamins which contain 250 mg B-12, 100 mg thiamine,
100 mg Riboflavin, etc. Much higher than the recommended adult daily dose. Are
there side effects to watch out for?
A. Even though B vitamins are water soluble rather than fat
soluble, meaning they are not stored in the body buy excreted, they could still
have an undesirable physiologic effect before they are excreted through the
kidneys. It is possible taking too much can throw off the delicate body
biochemistry for a while until the B vitamins are excreted. They could alter the
enzymatic processed in cells, cause rapid heart beat, overstimulation and
restlessness, and perhaps insomnia. There is no evidence that taking very high
amounts of B vitamins improves health. HIgh dosages of vitamin B6 can cause
nerve damage.
Japanese discover first new vitamin in 55 years
TOKYO (Reuters) - Japanese scientists have discovered a new vitamin that plays an
important role in fertility in mice and may have a similar function in humans, the
research leader said on Thursday. A research team led by Takafumi Kato confirmed that pyrroloquinoline quinone (PQQ), a
substance discovered in 1979, can be categorized as a vitamin. "There are many possible factors behind the drop in fertility," Kato said.
"We need more research to find out exactly what is happening to these mice and what
would be the effect on humans." PQQ is the first new vitamin to be discovered since 1948, the institute said. Vitamins
are defined as organic substances needed in small quantities for health and growth. They
must be obtained from food as they cannot be produced by the body. The best source of PQQ discovered so far is "natto," a pungent Japanese dish
of fermented soybeans. Other foods rich in the substance include parsley, green tea, green
peppers, kiwi fruit and papaya. PQQ is not generally included in multi-vitamin tablets available on the market, the
release said. There are 13 other types of vitamin already known, and PQQ is
believed to belong to the vitamin B group, the release said.
B vitamin supplement questions
Q. Are B vitamins helpful for diabetic neuropathy?
A. Perhaps, see
diabetic neuropathy
article that will explain other options for this condition.
Q. Great website - huge, thorough and thoughtful. I
have been told by a physician that B vitamin supplements are not advised for
patients with cancer (leukemia in the person in question). Can you offer any
opinions on the role of B vitamins and cancer, specifically leukemia?
A. I am not aware of prospective research studies that have looked
into the role of B vitamin supplements and the incidence of cancer or leukemia
or whether these B vitamin supplements influence the severity of the leukemia.
Many B complex supplements on the market provide several times the RDA for these
vitamins and I don't think they are necessarily healthy to ingest whether one
has cancer or not. At this time it may be premature to say exactly what the role
of B vitamin supplements are in terms of cancer prevention or aggravation, but
it may be a good idea to limit at most to 100 percent of the RDA rather than
taking megadoses of the B vitamins.
Q. Does the use of 7 keto dhea hormone with B vitamins
increase the side effects?
A. Both
7-Keto-DHEA hormone and B vitamins have a stimulating
nature, therefore the combination in high dosages could cause overstimulation
and insomnia.