Try many different ones. Each fruit has a different set of beneficial plant substances such as carotenoids and flavonoids that have antibacterial, antiinflammatory, antitumor and antioxidant properties. Reduce your fruit juice intake if you are diabetic. Avoid drinking lots of fruits juices since they contain a large amount of fructose. Fructose can elevate blood sugar and lead to weight gain.
    Wash all fruits before eating to reduce pesticides and contamination by germs. Buy organic when possible.

Types of Fruits
Acai Berry is a fruit from the Amazon rainforest and delicious Acai berry smoothies are not available. For more information on acai berry, visit the web page.
Acerola fruit is available as a supplement, see Acerola cherry powder extract for more information.
Amla fruit is used in India and by Ayurvedic doctors. See amla extract for more information.
Apple
Apricot
Aronia fruit
Banana
Berries - bilberry, blueberry, cranberry, raspberry, strawberry. See berries for more information.
Caigua is a curved, long fruit native to Peru sometimes eaten as a vegetable.
Camu Camu is a fruit from the Amazon rainforest that has a high content of vitamin C.
Cantaloupe fruit
Cherry fruit extract is available as a supplement
Coconut fruit
Cranberry fruit and juice are helpful for urinary health. You can find Cranberry extract for sale at Physician Formulas.
Cupuacu fruit from the Amazon forest
Durian fruit health benefitsd
Fig
Gac fruit has a high concentration of lycopene, vitamin C, zeaxanthin, and beta carotene. Gac fruit grows in Asia.
Guava
Grape has many health benefits due to content of Resveratrol and other beneficial substances.
Grapefruit fruit. Grape seed extract is sold as a supplement.

Irvingia gabonensis is also known as African mango, a fruit commonly eaten in West Africa, including Cameron and Gabon. Extracts from this fruit are helpful as weight loss supplements.

Kiwi fruit
Effects of kiwifruit consumption on serum lipid profiles and antioxidative status in hyperlipidemic subjects.
Int J Food Sci Nutr. 2009 Feb. Chang WH, Liu JF. Institute of Nutrition and Health Science, Taipei Medical University, Taipei, Taiwan.
The purpose of the study was to investigate the effects of consumption of two kiwi fruit per day on the lipid profile, antioxidants and markers of lipid peroxidation in hyperlipidemic adult men and women in Taiwan. Forty-three subjects who had hyperlipidemia, including 13 males and 30 females were asked to consume two kiwi fruits per day for 8 weeks. No significant differences from baseline to 8 weeks of the intervention were detected for triacylglycerol, total cholesterol, or LDL cholesterol. However, after 8 weeks of consumption of kiwi fruit, the HDL-C concentration was significantly increased and the LDL cholesterol/HDL-C ratio and total cholesterol/HDL-C ratio were significantly decreased. Vitamin C and vitamin E also increased significantly.Regular consumption of kiwi fruit might exert beneficial effects on the antioxidative status and the risk factors for CVD in hyperlipidemic subjects.

Lemon fruit - Citric acid is responsible for the tart taste of many fruits where it is found. Citric acid is present in citric fruits such as lemons, limes, oranges, and pineapples.
Lime
Longan berry - I have tasted dried longan berry and it is delicious.
Luo han guo fruit extract is many times sweeter than sugar. Luo-Han-Guo has been used as a natural sweetener in China for nearly a millennium due to its flavor and lack of food energy,
Loquat fruit and loquat leaf extract
Lucuma fruit powder is used in ice cream
Lychee fruit
Mango fruit - The mango fruit grows in the tropics. Mangoes belong to the genus Mangifera which consists of about 30 species of tropical fruiting trees.
Mangosteen fruit grows in Asia and Mangosteen supplements have become quite popular.
Mulberry
Nashi
Orange
Papaya fruit (Carica papaya) - Papaya has an enzyme called papain, a protease. See Wobenzym supplement that contains papain.
Passion fruit
Peach
Pear
Pineapple - Bromelain is an enzyme found in pineapples. Supplements of Bromelain are available over the counter.
Plum
Pomegranate fruit has become quite popular due to many purple colored antioxidants. See Pomegranate if you would like to buy this supplement.
Prickly pear cactus fruit is delicious and has many health benefits. Supplements of Prickly-Pear-Cactus are available.
Prune juice is great for those who have constipation.
Purple Grape
Quince fruit
Tangerine peel has some anti cancer potential
Tomato - Botanically speaking, a tomato is a fruit since it is the ovary, together with its seeds, of a flowering plant. However, from a culinary perspective, the tomato is served as part of a main course of a meal, as are other vegetables, rather than at dessert.
Watermelon is a fruit that has a pinkish color which is due to the high Lycopene content. Watermelon is a delicious fruit dessert when eaten with feta cheese.
White Grape
Wolfberry is also called goji berry.

Allergy to fruit, oral allergy syndrome
Some people have an allergic reaction to certain fruits -- for example, raw apples but not cooked apples. That's because there are proteins in raw apples that are very similar to the proteins in birch pollen. Cooking the offending fruits and vegetables change the shapes of these proteins, so people with an allergy syndrome will usually be able to eat them without a problem.
   A common oral allergy syndrome, for instance with itchy or swelling lips, occurs with eating a mango and being exposed to the rind. Some people find that the peel of a fruit has more allergens than the meat. Because the reaction is usually localized to the mouth area, including lips, tongue, and throat, some people will choose to ignore the symptoms and continue to eat offending foods. In rare cases people with oral allergy syndrome experience anaphylaxis, a life-threatening reaction that may include blocked airways, hypertension, anxiety, vomiting and diarrhea. The most severe reactions require the use of an injection of epinephrine to subsides. Some people who undergo allergy shots for pollen allergies will experience relief in oral allergy syndrome.

Pollens and associated foods
Ragweed: Bananas, melons (watermelon, cantaloupe, honeydew), tomatoes
Birch: Apples, carrots, celery, peaches, pears, potatoes, hazelnuts
Grass: Kiwis, tomatoes
Mugwort: Apples, carrots, celery, kiwi fruit, peanuts, some spices (caraway seeds, parsley, coriander, anise seeds, fennel seeds)
Source: The Mayo Clinic

Vegetable and Fruit Powder
Immunity and antioxidant capacity in humans is enhanced by consumption of a dried, encapsulated fruit and vegetable juice concentrate.
J Nutr. 2006 Oct;136(10):2606-10. Nantz MP, Rowe CA, Nieves C Jr, Percival SS.
Food Science and Human Nutrition Department University of Florida Gainesville, Florida 32611.
We hypothesized that a commercially available encapsulated fruit and vegetable juice powder concentrate could support functional indices of health due to increased intake of various phytonutrients. This was a double-blind, randomized, placebo-controlled investigation of 59 healthy law students who consumed either fruit and vegetable juice powder concentrate or placebo capsules for 77 days. Blood was collected on d 1, 35, and 77 to examine the number of circulating alphabeta- and gammadelta-T cells, cytokine production, lymphocyte DNA damage, antioxidant status, and levels of carotenoids and vitamin C. A log of illnesses and symptoms was also kept. The FVJC group tended to have fewer total symptoms than the placebo group. By day 77 there was a 30% increase in circulating gammadelta-T cells and a 40% reduction in DNA damage in lymphocytes in the fruit and vegetable juice powder concentrate group relative to the placebo group. Plasma levels of vitamin C and of beta-carotene, lycopene, and lutein increased significantly from baseline in the fruit and vegetable juice powder concentrate group as did plasma oxygen radical absorptive capacity (50%). Interferon-gamma produced by phorbol-stimulated lymphocytes was reduced 70% in the fruit and vegetable juice powder concentrate group, whereas other cytokines (IL-4, IL-6, transforming growth factor beta) were unchanged relative to treatment or time. fruit and vegetable juice powder concentrate consumption during this study period resulted in increased plasma nutrients and antioxidant capacity, reduction in DNA strand breaks, and an increase in circulating gammadelta-T cells.

Fruit Juice and Weight Gain
Experts generally recommend limiting children's fruit juice drinking due to potential excess calorie intake. The higher a child's fruit juice intake, the greater the gain in body fat over time -- generally among children who are initially overweight or on the verge of becoming so. Children who eat whole fruits gain less body fat. Many fruit juices typically contain added sugar, and therefore, calories. The fruit juice boxes so popular with kids typically contain about 100 calories each. So a few of those each day can start to add up. Pediatrics, November 2006.
   However, pure fruit juice should not put weigh on kids if drank in moderate amounts. Contrary to popular belief, drinking pure 100 percent fruit juice does not make young children overweight or at risk for becoming overweight. Pure fruit juice provides essential nutrients and, in moderation, may actually help children maintain a healthy weight. The key here is moderation.

Fruit juice or eating fruit -  which is better?
Researchers have for years believed that vegetable and fruit juice do not have the same health benefits as a their whole fruit counterparts. But a study conducted by British nutrition researchers challenges this view. It is likely that 100 per cent fruit juice extracts could be just as effective in reducing the risk of some cancers and cardiovascular disease. the positive impact fruits and vegetables offer comes not from just the fiber, but also from the antioxidants, which are present in both the fruit juice as well as the whole fruit and vegetables.

Fruit drinks and diabetes
Sweetened fruit drinks are marketed as a healthier alternative to non-diet soft drinks but are just as likely to cause weight gain and increase the risk of diabetes.

Fruits and prescription drug absorption
Juice from certain fruits such as grapefruit, oranges, and apples, as well as the whole fruits, decrease oral absorption of some drugs by blocking an intestinal uptake transporter. Dr. David G. Bailey had previously reported that grapefruit juice blocks the drug-metabolizing enzyme cytochrome p450 3A4, boosting blood concentrations of some drugs to potentially toxic levels. Since then, nearly 50 medications have been found to carry the risk of grapefruit-induced adverse drug reactions. When consumed with either a glass of grapefruit juice or water containing the grapefruit flavonoid naringin, antihistamine fexofenadine drug absorption is reduced by half. Naringin has influence on the absorption of water soluble prescription drugs. The effects of fruits may be noticed with immunosuppressant cyclosporine, the antineoplastic agent etoposide, some beta blockers (atenolol, celiprolol, talinolol), and some antibiotics (ciprofloxacin, levofloxacin, itraconazole). Prescription medications should be taken at least 4 hours after fruit juice intake.

Fruit Harvest Seasons in Thailand according to Dave Rockwood who supplies fruit extracts
Banana - All year
Dragon Fruit - May-July
Durian - May-June
Guava - All year
Jackfruit - March-June
Jujube - August-December
Lime - June-August
Longan - May-July
Lychee - April-August
Mango - April-May
Mangosteen - May-October
Maoberry - August-October
Noni - April
Papaya - All year
Pomegranate - June-September
Pomelo
Rambutan - May-September
Roselle - November-December
Sala - May-July
Salak (Snake fruit) - May-August
Santol - May-June
Soursop - N/A
Starfruit - October-December

Fruit and fruit juice health benefit questions
Q. I was wondering if you heard of a fruit juice called " MONA- VIE.
   A. Mona-Vie is a fruit juice made from acai berry.

Q. I have wet macular degeneration. I read your paper about fruit intake. A week ago I started a daily fruit intake regimen for breakfast and I was wondering if it meets your suggested daily fruit intake? Daily fruit intake for breakfast one apple, one pear, one banana and one orange.
   A. I can't give individual guidance but it is a good idea to have a wide variety of vegetable and fruit intake as opposed to eating the same ones all the time.

I'm working on an article for a health magazine about hybrid fruits, and their health benefits. I'm trying to find out more about plumcots, and some of the benefits they may offer. I read a bit about phenolic compounds and was wondering if plumcots (a 50-50 split of apricots and plums) would be a good source of these antioxidants, and possibly any others. Also, I'm wondering what kind of benefits the presence of these antioxidants could offer my readers.
    It's difficult to know the full benefits of a hybrid fruit since it's nutritional value would not be as well investigated. But, as a general rule, it is a good idea to obtain a wide range of antioxidants from different fruits as opposed to a limited number. Many people have 2 or 3 of their favorite fruits and return to them over and over. It is a good idea to expand one's range and hybrid fruits are such an option. These fruits do contain phenolic antioxidants.