Saturday, 25 October 2014    HomeAbout UsContact Us    









You are here: Home Research Vitamin C


Oligomerized Lychee Fruit Extract (OLFE) and a Mixture of Vitamin C and Vitamin E for Endurance Capacity in a Double Blind Randomized Controlled Trial
Posted by Admin, Senior Editor in Vitamin C
Authored by PubMed
Topics: Vitamin C

  Mail To Friend    Printer Friendly Bookmark and Share

Vitamin C is water-soluble, and probably the most famous of all the vitamins. Even before its discovery in 1932, physicians recognised that there must be a compound in citrus fruits preventing scurvy, a disease that killed as many as 2 million sailors between 1500 and 1800. Later researchers discovered that man, other primates and the guinea pig depend on external sources to cover their Vitamin C requirements. Most other animals are able to synthesise Vitamin C from glucose and galactose in their body. The most prominent role of Vitamin C is its immune stimulating effect, which is important for the defence against infections such as common colds. It also acts as an inhibitor of histamine, a compound that is released during allergic reactions. As a powerful antioxidant it can neutralise harmful free radicals and aids in neutralising pollutants and toxins. Thus it is able to prevent the formation of potentially carcinogenic nitrosamines in the stomach (due to consumption of nitrite-containing foods, such as smoked meat). Importantly, Vitamin C is also able to regenerate other antioxidants such as Vitamin E. Vitamin C is required for the synthesis of collagen, the intercellular 'cement' substance which gives structure to muscles, vascular tissues, bones, tendons and ligaments. Due to these functions Vitamin C, especially in combination with zinc, is important for the healing of wounds. Vitamin C contributes to the health of teeth and gums, preventing haemorrhaging and bleeding. It also improves the absorption of iron from the diet, and is needed for the metabolism of bile acids, which may have implications for blood cholesterol levels and gallstones. In addition, Vitamin C plays an important role in the synthesis of several important peptide hormones and neurotransmitters and carnitine. Finally, Vitamin C is also a crucial factor in the eye's ability to deal with oxidative stress, and can delay the progression of advanced age-related macular degeneration (AMD) and vision-loss in combination with other antioxidant vitamins and zinc.

Kang SW, Hahn S, Kim JK, Yang SM, Park BJ, Chul Lee S. Oligomerized lychee fruit extract (OLFE) and a mixture of Vitamin C and Vitamin E for endurance capacity in a double blind randomized controlled trial. 1. J Clin Biochem Nutr. 2012 Mar;50(2):106-13. Epub 2011 Oct 18.
Antioxidant supplementations are commonly used as an ergogenic aid for physical exercise despite its limited evidence. The study aimed to investigate the effects of a polyphenol mixture and vitamins on exercise endurance capacity. Seventy regularly exercising male participants were randomly assigned to receive oligomerized lychee fruit extract, a mixture of Vitamin C (800?mg) and E (320?IU), or a placebo for 30 consecutive days. The study results showed that oligomerized lychee fruit extract significantly elevated the submaximal running time (p?=?0.01). The adjusted mean change was 3.87?min (95% CI: 1.29, 6.46) for oligomerized lychee fruit extract, 1.33 (-1.23, 3.89) for the vitamins, and 1.60 (-1.36, 4.56) for the placebo (p?=?0.33 in between groups). Oligomerized lychee fruit extract significantly increased the anaerobic threshold by 7.4% (1.8, 13.0). On the other hand, vitamins significantly attenuated VO(2)max by -3.11?ml/kg/m (-5.35, -0.87). Their effects on plasma free radical amount, however, were similar. Our results suggest that a polyphenol-containing supplement and typical antioxidants may have different mechanisms of action and that the endurance-promoting effect of oligomerized lychee fruit extract may not directly come from the scavenging of free radicals but may be attributed to other non-antioxidant properties of polyphenols, which requires further investigation.


Link to this article:   Show: HTML LinkFull LinkShort Link
Share or Bookmark this page: You will need to have an account with the selected service in order to post links or bookmark this page.

                 
  
Subscribe via RSS or email:
Follow us through RSS or email. Click the RSS icon to subscribe to our feed.

     
  

Related Articles:
Add a Comment
You must be registered and logged in to comment.





Visit Vaccines.Me for information and education on vaccination.


Latest Articles
Honey and Anti-Biotic Resistance: A New Approach!
On the Rejection of Hijaamah by the Physicians (Shaykh Muhammad Bin Ibraaheem Aal Al-Shaykh)
How to Limit Efffects of Bisphenol-A Upon Children
The Harmful Effects of Bisphenol-A on the Body and Its Biochemistry
Nestle Attempting to Patent Nigella Sativa ((Black Seed)
Ajwa Dates Contain Cancer-Preventing Property
Eat Less and Live Healthier and Longer?
Efficacy of a Herbal Extract Gel in the Treatment of Gingivitis: A Clinical Study
Pomegranate Materials Inhibit Flagellin Gene Expression and Flagellar-Propelled Motility of Uropathogenic Escherichia Coli Strain CFT073
Anti-Inflammatory Effects of Pomegranate (Punica Granatum L.) Husk Ellagitannins in Caco-2 Cells, an in Vitro Model of Human Intestine

Pages
No pages found.

Most Popular
Garlic, Honey and Apple Cider Vinegar: Must Have Excellent Home Remedy
How To Eat Fruit Properly
Ibn al-Qayyim: Henna Has Many Benefits from Treating Headaches to Burns
Rocket: A Spicy Salad Leaf With Potent Health Benefits
Why We Need Protein in our Diets
Five Superfoods You Should Be Eating Everyday
Deodorant And Anti-Perspirant Dangers - Do You Know What You're Putting Under Your Armpits?
What Foods Are Good For Your Eyesight?
The Different Kinds Of Exercises Your Body Needs
Foods for Healthy Hair

Archives (View more)
2014 • March
2014 • February
2013 • October
2012 • October
2012 • August
2012 • January
2011 • December
2011 • November
2011 • October
2011 • September
2011 • August
2011 • July


Copyright © 2014 . All rights reserved. RSSTagsPrivacyLegal and Terms of Use Where Can I Learn Arabic Online visit the site