Vitamins

Methylfolate vs folic acid: methylfolate raises blood folate, but only folic acid has neural-tube-defect prevention trials. A doctor sorts the hype.

A doctor’s folate guide: the Grade A folic acid recommendation in pregnancy, what an MTHFR result really means, and folic acid vs methylfolate explained.

A registered dietitian’s vitamin A guide: retinol vs beta-carotene, RDA in RAE, the pregnancy and smoker risks, and who actually needs a supplement.

Tocotrienols vs tocopherols: an RD compares the two vitamin E families on absorption, real human trial evidence, and which form is worth your money.

A registered dietitian’s vitamin E guide: the RDA, mixed vs alpha-only forms, the honest high-dose harm evidence, and who actually needs a supplement.

A preventive medicine specialist on the best multivitamin for women over 50: drop the iron, prioritize vitamin D, B12, modest calcium, and K2. See what the evidence supports.

A preventive medicine doctor on the best multivitamin for men over 50: prioritize B12 absorption, vitamin D, and an iron-free or low-iron formula. See the picks.

A registered dietitian on the best multivitamin for women: why iron and folate are the only truly female-specific levers, and when to drop iron after menopause.

A registered dietitian on the best multivitamin for men: skip the iron most men don’t need, prioritize vitamin D and magnesium, and buy third-party tested.

A registered dietitian’s multivitamin guide: what the big RCTs actually show, who genuinely benefits, and why most well-fed adults are better off spending the money on two or three targeted nutrients.