A sulphur-containing compound humans cannot synthesise but do actively transport into cells. Mushrooms are by far the richest dietary source.
2 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.