that contain folic acid.
and
If you are pregnant,
DO NOT take prenatal vitamins!
Folic acid supplementation is dangerous – especially for pregnant women
Women who take supplemental folic acid increase their breast cancer risk by 20-30%, according to a study in the American Journal of Clinical Nutrition. Researchers collected data on women's folic acid intake from multivitamins over a 10-year period – they found that the women who took multivitamins containing folic acid were more likely to be diagnosed with breast cancer than those that did not. 1,2
If folic acid can have these dangerous effects, why is it included in most
multivitamins, prenatal vitamins and fortified grain products?
Folic acid is the synthetic form of folate, a member of the family of B vitamins that is involved with DNA synthesis and DNA methylation, which essentially turns genes on and off. Because of these crucial functions, folate plays important roles in fetal development and nerve tissue health as well as cancer initiation and progression.
Unlike synthetic folic acid, folate obtained from food sources – especially green vegetables – protects against breast and prostate cancer.
Spinach, raw | 843 μg |
| Endive | 835 μg |
Romaine lettuce | 800 μg |
Asparagus, cooked | 750 μg |
Mustard greens, raw | 700 μg |
Collards, raw | 550 μg |
| Okra, cooked | 520 μg |
Bok choy, raw | 500 μg |
| Brocolli Rabe, raw | 375 μg |
Arugula, raw | 340 μg |
Artichokes, cooked | 330 μg |
Brussels sprouts, cooked | 300 μg |
Broccoli, cooked | 300 μg |
Cauliflower, raw | 225 μg |
| Red leaf lettuce | 225 μg |
| Celery, raw | 225 μg |
For the rest of the article and references see:
http://www.drfuhrman.com/library/folic_acid_dangers_and_prenatal_vitamins.aspx
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