A cofactor in energy metabolism and antioxidant recycling.
Every figure here is per 100 g of the food, not per serving. That makes foods comparable to each other, but it is not how anyone eats: 100 g of a dried spice and 100 g of a leafy green are very different portions, so a high position in this list does not tell you what a meal contributes.
Nutrient values are per 100 g of the USDA reference entry named on this page and vary with variety, growing conditions, storage and preparation.
% DV compares the per-100 g amount with the FDA Daily Value of 1.3 mg for adults and children aged 4 and over. It is a labelling reference, not a personal target.
24 entries with a measured riboflavin (b2) value, highest first.
Bos taurus
The metabolic and storage organ of cattle, and consequently one of the most nutrient-concentrated foods in the human diet by a…
212% of the Daily Value per 100 g
Gallus gallus domesticus
A small, soft organ meat with a milder flavour and finer texture than beef liver, which is why it dominates pâtés and parfaits.…
137% of the Daily Value per 100 g
Acer saccharum
Sap from sugar maple and related species boiled down roughly forty-fold until it is about two-thirds sugar, predominantly…
98% of the Daily Value per 100 g
Capsicum annuum
Ground dried Capsicum annuum peppers, ranging from sweet to hot and sometimes smoked over oak. The USDA entry is per 100 g of the…
95% of the Daily Value per 100 g
Prunus dulcis
The edible seed of a stone fruit closely related to the peach, eaten raw, roasted or ground into flour and butter. The USDA…
88% of the Daily Value per 100 g
Capsicum annuum
Dried ground fruit of hot Capsicum annuum varieties. The USDA entry is per 100 g of the dried spice; a shake over a dish is well…
71% of the Daily Value per 100 g
Glycine max
The legume behind tofu, soy milk, tempeh and miso, eaten either as mature dry beans or as edamame, the immature green pod…
67% of the Daily Value per 100 g
Origanum vulgare
The dried leaf of Origanum vulgare, dominated by the phenols carvacrol and thymol. The USDA entry is per 100 g of dried leaf,…
41% of the Daily Value per 100 g
Gallus gallus domesticus
The fat-soluble half of the egg, carrying essentially all of its fat, cholesterol, fat-soluble vitamins, choline and carotenoid…
41% of the Daily Value per 100 g
Cervidae spp.
Meat from deer, whether wild-harvested or farmed. Because the animals are active and rarely grain-finished, the carcass carries…
37% of the Daily Value per 100 g
Thymus vulgaris
A small-leaved Mediterranean subshrub used fresh or dried, and one of the few herbs that stands up to long cooking. Its…
36% of the Daily Value per 100 g
Gallus gallus domesticus
A complete package of protein, fat and micronutrients built to grow a chick, split between a protein-and-water white and a…
35% of the Daily Value per 100 g
Fagopyrum esculentum
A pseudocereal seed from a plant in the rhubarb family, unrelated to wheat and free of gluten. The USDA reference entry is for…
33% of the Daily Value per 100 g
Agaricus bisporus
The most widely cultivated mushroom in the world, sold at several stages of maturity under different names. White button, cremini…
31% of the Daily Value per 100 g
Salmo salar
An anadromous fish that feeds at sea and returns to fresh water to spawn. Its pink flesh comes from astaxanthin accumulated…
29% of the Daily Value per 100 g
Trigonella foenum-graecum
The hard, bitter seed of a legume-family plant, used whole, ground or sprouted, and responsible for the smell most people…
28% of the Daily Value per 100 g
Engraulis encrasicolus
Tiny oily fish usually sold salt-cured and packed in oil, where months of curing dissolves the flesh into an intensely savoury…
28% of the Daily Value per 100 g
Whole cooked soybeans bound into a firm cake by Rhizopus mould, an Indonesian ferment that keeps the beans intact rather than…
28% of the Daily Value per 100 g
Helianthus annuus
The hulled kernels of the sunflower, one of the densest common food sources of vitamin E. The USDA reference entry is for the…
27% of the Daily Value per 100 g
Brassica oleracea var. sabellica
A loose-leaved cabbage that does not form a head, eaten raw in salads or cooked. Like other Brassica oleracea vegetables it…
27% of the Daily Value per 100 g
Sus scrofa domesticus
A small muscle running along the inside of the spine that does almost no work, making it the leanest and most tender cut on the…
26% of the Daily Value per 100 g
Salvia officinalis
The grey-green leaf of Salvia officinalis, used fresh or dried and traditionally paired with fatty meats. The USDA entry is per…
26% of the Daily Value per 100 g
A hard cheese aged a year or more, during which enzymes break down protein into free amino acids and the crystalline tyrosine…
26% of the Daily Value per 100 g
Cuminum cyminum
The dried seed of Cuminum cyminum, used whole or ground across South Asian, Middle Eastern and Latin American cooking. The USDA…
25% of the Daily Value per 100 g