Evidence-based health tools and expert articles for smarter, healthier living.
What the USDA FoodData Central database actually says about lutein and zeaxanthin — the carotenoids in your macula. Top food sources, AREDS2 dosing, bioavailability, and the column quirk every health blog gets wrong.
Chromium-rich foods backed by NIH ODS and USDA FoodData Central — daily AI values, absorption, deficiency, supplement cautions, and what the FDC dataset does and does not measure.
An engineer-built look at phosphorus-rich foods in the USDA FoodData Central dataset, the hidden additive problem flagged by the FDA and NKF, and why bioavailability matters more than total milligrams.
I aggregated USDA FoodData Central manganese values across 1,465 foods. 134 cleared 1.0 mg per 100 g, but most U.S. adults already meet the Adequate Intake without trying. Here is what the data says about manganese-rich foods, function, and toxicity risk in 2026.
I aggregated USDA FoodData Central copper values across 1,465 foods. Only 47 cleared 0.5 mg per 100 g, and most are foods Americans skip. Here is what the data says about copper-rich foods, deficiency signs, and intake gaps in 2026.
Biotin (vitamin B7) is needed in tiny daily amounts (30 mcg/day for adults). USDA FoodData Central highlights cooked beef liver, eggs, salmon, sunflower seeds, and almonds as top sources. The 2017 FDA Safety Communication warns that high-dose biotin supplements can interfere with cardiac troponin and thyroid lab tests.