Astringent polyphenols that bind proteins and minerals — the reason tea with a meal reduces non-heme iron absorption.
11 foods, grouped by presence band. Bands are used instead of amounts because compound content swings widely with cultivar, soil, storage and preparation — a single number per food would look more precise than the measurements justify.
One of the compounds this food is characterised by in the literature.
Consistently reported in this food in amounts researchers treat as meaningful.
Camellia sinensis
Leaves of Camellia sinensis heated soon after picking to stop enzymatic browning, which leaves the catechins largely intact. The…
Corylus avellana
The round nut of the hazel shrub, mostly grown in Turkey and Italy and largely destined for confectionery. The USDA reference…
Carya illinoinensis
A hickory nut native to North America, close relative of the walnut and similarly rich in unsaturated fat. The USDA reference…
Sorghum bicolor
A drought-tolerant cereal eaten whole, milled into flour or popped, and free of gluten. The USDA reference entry is for the dry…
Recorded in this food without a dependable quantity attached to it.
Rubus fruticosus
Dark aggregate fruit of bramble canes, distinguished from raspberries by keeping the central core when picked. Sold fresh in…
Cinnamomum cassia / Cinnamomum verum
Dried inner bark from several Cinnamomum species. Almost all supermarket cinnamon is cassia, which contains far more coumarin…
Syzygium aromaticum
The dried flower buds of Syzygium aromaticum, one of the most aromatic spices in common use. The USDA entry is per 100 g of…
Phoenix dactylifera
The dried fruit of the date palm, around two-thirds to three-quarters sugar by weight, and used both as a fruit and as a…
Phaseolus vulgaris
The large red-skinned variety of the common bean, and the one carrying the highest concentration of the toxic lectin…
Panicum miliaceum
A group of small-seeded, drought-tolerant cereals staple across the Sahel and South Asia, sold hulled and cooked like rice or…