Nutrient Rich

Browse the body by organ, explore nutrients, and search foods with live nutrient data from USDA FoodData Central. The organ-to-nutrient relationships on this site are curated educational mappings, while food records and per-100g nutrient values are pulled live from USDA.

78 organs
39 nutrient topics
Live USDA food data

Vitamin B3 (Niacin)

Niacin is involved in energy metabolism, DNA repair, and cellular signaling. It supports the nervous system and skin.

Top foods below are looked up live through USDA FoodData Central and shown with a per-100g value when available.

Foods high in Vitamin B3 (Niacin)

No live USDA matches found for this nutrient right now.

USDA notes: FoodData Central provides REST access, requires a data.gov API key, offers Food Search and Food Details endpoints, and currently lists a default limit of 1,000 requests per hour per IP address. Keep your API key private and do not commit it into a public repository.