Evidence-based health tools and expert articles for smarter, healthier living.
A data-first look at vitamin B3 (niacin) using USDA FoodData Central nutrient ID 1167: top food sources, the niacin equivalents (NE) calculation, deficiency history (pellagra), and where supplementation cautions actually apply.
An engineer's read of the USDA FoodData Central riboflavin dataset: which foods actually deliver B2, where deficiency risk concentrates in 2026, and what the numbers reveal that listicles miss.
An engineer-built aggregation of USDA FoodData Central data on vitamin B1 (thiamine) — top food sources, deficiency risk factors, and how milling and cooking affect intake.
An engineer-built look at vitamin B6 (pyridoxine): deficiency signs, USDA FoodData Central rankings of top food sources, bioavailability quirks across plant and animal sources, and what NIH, CDC, Mayo Clinic, Cleveland Clinic, and Harvard say about who is most at risk.
After indexing 1,465 foods from USDA FoodData Central, one nutrient kept surprising me: vitamin E. The form in supplements is not the form most Americans actually eat.
USDA FoodData Central reports vitamin A in four separate columns for a reason. Retinol from animal foods is used directly; carotenoids from plant foods convert at roughly 12 to 1. This guide pulls live FDC values for nine common foods and explains RAE versus IU, bioavailability factors, and the toxicity gap between preformed vitamin A and beta-carotene, with citations to NIH ODS, WHO, Harvard, Mayo Clinic, and the IOM.