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Folate intake may help to prevent memory lapse

This Way to Memory Lane

The other day a colleague of mine mentioned an e-Alert he’d read last week, and for a few moments I couldn’t remember a thing about it. Nothing. Blank slate. Clear blue sky. Then, like switching on a light, the memory suddenly bounced bank and all the details were right there.

This type of brief memory lapse is no big deal as long as it doesn’t occur frequently. Nevertheless, a new study reveals that if I boost my folate intake it might help the cause in the long run.

Folate is a B complex vitamin, probably best well known to the general public as a nutrient taken by pregnant women to help prevent neural tube defects in unborn children. To a lesser extent, folate is known for reducing levels of homocysteine (an amino acid that promotes the buildup of plaque on blood vessel walls).

I would guess that folate is least well known for helping maintain cognitive performance. But that may change if Jane Durga has her way. Ms. Durga is a nutritionist at Wageningen University in the Netherlands. As part of her Ph.D. research on the effects of folic acid (synthetic folate) among the elderly, she lead a folic acid intervention study that offers promising results for those who want to help preserve their memory as they age.

Folate flying solo

The Durga study was presented in June 2005 at the Alzheimer’s Association International Conference on Prevention of Dementia. Ms. Durga and her team enlisted more than 800 men and postmenopausal women between the ages of 50 and 70 years. Subjects were randomly selected to receive either 800 micrograms (mcg) of folic acid per day or a placebo. The trial period lasted three years.

The results:

  • In the folic acid group, blood tests revealed that average folate levels were five times higher than they were at baseline.
  • Homocysteine levels dropped an average of 25 percent in this group.
  • Subjects in the folic acid group performed significantly better than placebo subjects in cognitive tests that assessed memory, information processing speed, word fluency, cognitive flexibility and eye-hand coordination speed.
  • Ms. Durga told NutraIngredients-USA that this is the first study that convincingly demonstrates folic acid’s effectiveness in slowing cognitive decline, even when the vitamin is not mixed with other B vitamins.

NutraIngredients-USA also reports that next winter the National Institutes of Health will release a new study that examines the effect of high doses of folic acid and other B vitamins on cognitive decline in Alzheimer’s patients.

You must remember this

The best dietary sources of folic acid include spinach and other dark green vegetables, brewers yeast, lima beans, cantaloupe, watermelon, wheat germ, and liver from organically raised animals.

Even though this vitamin is easy to incorporate in the diet, alternative medicine pioneer, Jonathan V. Wright, M.D., says that folate is quite high on the vitamin deficiency list. And those who have this deficiency are flirting with nutritional disaster. In an issue of his Nutrition & Healing newsletter, Dr. Wright wrote, “Folic acid (along with vitamin B12 and zinc) is absolutely key to DNA reproduction and repair.”

Supplements of folate are available as natural (folate) or synthetic (folic acid). The daily recommended intake of folate is 400 mcg. A high intake of folate can mask a vitamin B-12 deficiency in older people, so the FDA has mandated that folate supplements can be sold in doses no greater than 800 mcg. But a B-12 deficiency can be easily avoided by eating plenty of meat, fish and eggs, or by taking B-12 supplements.

HSI Panelist Allan Spreen, M.D., recommends folate supplements of 1.6 mg (1600 mcg) per day, and as much as 5 mg for those who want to address cardiovascular problems. Dr. Spreen points out that, “Folate isn’t effective in low doses except in a limited percentage of cases.” And to avoid a deficiency of B-12, he recommends 1mg (1000 mcg) per day in sublingual form (dissolved under the tongue).

In addition, Dr. Spreen also suggests that to get the most out of folate, 100 mg per day of B-6 is also necessary, as well as 400-500 mg of magnesium per day (to make the B-6 more effective). If you take a good quality multivitamin, you’re probably already getting a good foundation of these nutrients. But when addressing specific health concerns, Dr. Spreen recommends that you beef up the B vitamins and folate to reach these totals.

Sources:
“Effect of 3-year Folic Acid Supplementation on Cognitive Function in Older Adults” Alzheimer’s Association International Conference on Prevention of Dementia, June 18-21, 2005, alz.org
“Folic Acid Supplements Boost Memory in Elderly” NutraIngredients-USA, 6/21/05, nutraingredients-usa.com

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