Acetyl
l-carnitine 300 mg and 500 mg capsules - side effects
The mind boosting effect of acetyl l carnitine is often noticed within a few
hours, or even within an hour. Most people report feeling mentally sharper,
having more focus and being more alert. Some find a mild mood enhancement. This
nutrient may be used as an overall mind booster.
Dosage
The typical dosage is 250 to 500 mg
in the morning, a few times a week. Side effects of overstimulation may occur at dosages greater
than 500 mg.
A website recommends 1000 to 2000mg of
acetyl-L carnitine a day. Dr. Ray Sahelian, who by the way I consider the most
credible and honest on the web, says much less. I have been taking 1000 mg a
day because my father has been diagnosed with Alzheimer's disease, and I am
concerned about my genetic risks. But my sleep seems to be much shallower since
I upped my dosage. Could the 1000 mg be a possible cause of my less-deep sleep
patterns?
We have found that high doses of acetyl l-carnitine to interfere
with sleep which is not a good thing if one wants to have optimal health.
Mind Power Rx
formulated by Ray Sahelian, M.D.
Acetyl
l carnitine and carnitine are synthetically made in a
lab. For some nutrients there is not enough present in natural sources to be able to
extract in sufficient quantities.
The nutrients and vitamins in Mind Power Rx include acetyl l carnitine, carnitine, carnosine, choline, DMAE, inositol, methylcobalamin, pantothenic acid, trimethylglycine, tyrosine, and vinpocetine. The herbs in Mind Power Rx include: ashwagandha, bacopa, ginkgo biloba, Fo-Ti, mucuna pruriens, and Reishi.
Chronic fatigue syndrome
Exploratory open label, randomized study of acetyl- and
propionyl-carnitine in chronic fatigue
syndrome.
Psychosom Med. 2004.
We compared the effects of acetyl-carnitine, propionyl-carnitine
and both compounds on the symptoms of chronic fatigue syndrome (CFS).
In an open, randomized fashion we compared 2 g/d acetyl-L-carnitine, 2 g/d
propionyl-L-carnitine, and its combination in 3 groups of 30 CFS patients
during 24 weeks. Scores were assessed 8 weeks before treatment; at
randomization; after 8, 16, and 24 weeks of treatment; and 2 weeks later. Attention concentration improved in all
groups, whereas pain complaints did not decrease in any group. Two weeks after
treatment, worsening of fatigue was experienced by 52%, 50%, and 37% in the
acetyl-carnitine, propionyl-carnitine, and combined group, respectively. In the
acetyl-carnitine group, but not in the other groups, the changes in plasma
carnitine levels correlated with clinical improvement.
Acetyl-carnitine and propionyl-carnitine showed beneficial effect on fatigue
and attention concentration. Less improvement was found by the combined
treatment. ALCAR had main effect on mental fatigue and propionyl--carnitine on
general fatigue.
Fibromyalgia
benefit
Double-blind, multicenter trial comparing acetyl l-carnitine with placebo in
the treatment of fibromyalgia patients.
Clin Exp Rheumatol. 2007. Rheumatology Unit, University of
Verona, Italy.
In this multicenter randomized clinical trial we evaluated the efficacy of
acetyl L carnitine in patients with overt fibromyalgia. One hundred and two
patients meeting the American College of Rheumatology criteria for FMS were
randomized into the study. The treatment consisted of 2 capsules/day of 500 mg
acetyl L carnitine or placebo plus one intramuscular injection of either 500
mg or placebo for 2 weeks. During the following 8 weeks the
patients took 3 capsules daily containing either 500 mg acetyl L carnitine or
placebo. The "total myalgic score" and the number of positive tender
points declined significantly and equally in both groups until the 6th week
of treatment. At the 10th week both parameters remained unchanged in the
placebo group but they continued to improve in the ALCAR group with a
statistically significant between-group difference. A statistically
significant between-group difference was observed for depression and musculoskeletal
pain. Treatment was well-tolerated. These results indicate that acetyl L carnitine may be of benefit in patients with fibromyalgia, providing
improvement in pain as well as the general and mental health of these
patients.
HIV patients
Effect of L-Acetyl l carnitine on Body Composition in HIV-related
Lipodystrophy.
Horm Metab Res. 2009.
This study examined the impact of L-acetyl l-carnitine treatment on
metabolic parameters and body composition in patients with lipodystrophy
syndrome secondary to antiretroviral treatment in human immunodeficiency
virus (HIV) infection. Eight months of L-acetyl l carnitine
treatment increased lipid oxidation, decreased intramyocellular triglyceride
content, and induced a more physiological distribution of fat deposits.
Nerve health
I have recently been reading the studies concerning
acetyl-l-carnitine with both human and rat subjects and nerve trauma with a
great deal of interest. Seven years ago I had major surgery on my right lung
where several intracostal nerves were severed. I have been living with severe
burning pain since then. I have been lucky enough to have switched from a
neurologist who only wanted to treat my symptoms with drugs back to my primary
physician who is much more understanding about nutritional supplements in
healing. I am intending to begin therapeutic dosage and was wondering how long
it takes before a reduction in pain is perceived. My doctor and I think the
nerves are
finally regenerating, but I am still in a great deal of pain and would like to
actually help it heal instead of just taking pain meds. I was very interested
in the reports that acetyl-l-carnitine helped a great deal with pain in
addition to healing.
Too little research is available regarding
nerve health or pain reduction. As with many supplements, each person would
need to try for themselves to see if any benefits occur. Plus, each person and
each condition is different, hence it is difficult to make even any kind of
generalization.
Sexual health
Carnitine versus androgen administration in the treatment of sexual
dysfunction, depressed mood, and fatigue associated with male aging.
Urology. 2004.
To compare testosterone undecanoate versus propionyl-L carnitine plus
acetyl-L carnitine and placebo in the treatment of male aging symptoms.
A total of older 120 patients were randomized into three groups. Group 1 was given testosterone undecanoate 160 mg/day, the second group was given propionyl-L-carnitine 2 g/day
plus acetyl-L-carnitine 2 g/day for 6 months. The assessed variables were total
prostate-specific antigen, prostate volume, peak systolic velocity,
end-diastolic velocity, resistive index of cavernosal penile arteries, nocturnal
penile tumescence, total and free testosterone, prolactin, luteinizing hormone,
International Index of Erectile Function score, Depression Melancholia Scale
score, fatigue scale score, and incidence of side effects. Testosterone
and carnitines significantly improved the peak systolic velocity, end-diastolic
velocity, resistive index, nocturnal penile tumescence, International Index of
Erectile Function score, Depression Melancholia Scale score, and fatigue scale
score. Acetyl-carnitine and priopionyl-lcarnitine proved significantly more active than testosterone in
improving nocturnal penile tumescence and International Index of Erectile
Function score. Testosterone significantly increased the prostate volume and
free and total testosterone levels and significantly lowered serum luteinizing
hormone; carnitines did not. No drug significantly modified prostate-specific
antigen or prolactin.
Safety and side effects, risk, danger
Side effects of acetyl-l-carnitine include restlessness,
nausea and overstimulation. These negative reactions usually occur at
dosages above 500 mg. Insomnia is possible if the dosage is above 1000 mg a
day.
It can be taken with food to reduce nausea, but if one
wishes to feel the mental stimulating effects more clearly, it can be taken
on an empty stomach.
Transient seizure activity induced by acetyl l-carnitine.
Neuropharmacology. 1984.
Intracerebral injection of L-acetyl-l-carnitine in rats induced interictal and
ictal epileptic phenomena with immediate onset, lasting up to 4 hours. Epileptogenic properties are probably related to muscarinic agonism. The
transition from interictal to ictal events may involve failure of GABAergic
mechanisms.
For about 6 years I have been taking 500 mg of
acetyl L carnitine mostly every day with my other multivitamin, calcium, omega
fatty acids wild salmon oil), CoQ10, etc. I am 54, healthy, not overweight,
with no known health problems and I exercise regularly. In my mid teens and
until age 23, I took dilantin for seizures. I have not taken dilantin now for
30 years and have had no seizures since. At the time my family doctor
prescribed dilantin he told my parents and me that he expected me to grow out
of this problem by the time I was in my 20s. I have just been reading today that a possible side effect of taking
acetyl L Carnitine could be seizures.
We searched the medical literature and found this study on
rodents. We have not seen any reports in the medical literature regarding
seizures being triggered by acetyl-l-carnitine in humans, but this does not mean it has
not occurred.
Combining with other supplements
and brain enhancers
Should acetyl l-carnitine be taken in
conjunction with slpha lipoic acid since the latter helps transports the
former into the mitochondria?
Acetyl l carnitine
300 mg is used for
brain
enhancement, mood
improvement and
cognitive support.
It can be combined with other brain enhancers.
The 300 mg is a potent mind booster and antioxidant. Most
people find one capsule is the right dose while some people may find the
occasional use of 2 capsules helpful. It increases alertness
and focus. It would be best not to take a capsule with other brain
boosting supplements due to possible overstimulation. One option is to
alternate the use of acetyl l-carnitine one day with Mind Power Rx the next
day, or alternate with other brain supplements such as DMAE, choline,
ginkgo, and others. Doses above 500 mg may, in some people, lead to
overstimulation, insomnia, and nausea. For long term use one capsule 3
times a week with a week off each month is a good option. Acetyl carnitne
can be taken with small doses of other supplements such as vitamins E and
C, and it can be used together with fish oils. Many products on the market
have acetyl carnitine together with alpha lipoic acid and are promoted for
antiaging purposes. Be careful using high amounts of these combinations
since they can keep you awake at night, and shallow sleep is certainly not
helpful for longevity purposes. I would not recommend taking more than 10
to 30 mg of R lipoic acid or 20 to 60 mg of regular alpha lipoic acid when
combined with 300 mg of acetyl carnitine. There is no human evidence that
the combination of these two nutrients is better than either alone. Even if
the combination is preferable, we have no idea of the ideal dosage, and it
could be vastly different between different people.
I am thinking of taking DMAE as a cognitive booster;
however I have read that acetyl-carnitine is better. The two substances may
work in different ways, but their overall effect, save for unpredictable
personal differences in response to them, seems to be quite similar. So
could you please point out why exactly, should one be obliged to choose, you
would prefer one over the other?
Both DMAE and ALC are good cognitive enhancers and different people
have different preferences. I personally like ALCAR
more since, for me, it gives me more alertness and focus with fewer side
effects. DMAE can sometimes make my muscles tense, especially muscles around
the neck. And, it is a good idea to try different cognitive enhancers to see
which ones are most agreeable and beneficial.