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E101ColorantLow concern
Riboflavin
In plain words
The short version
Vitamin B2 — used both as a yellow-orange colorant and as a nutritional fortifier.
Why it's green
It's widely considered safe at the amounts used in food, so we mark it green. The Safety section below has the details.
Safety profile
No ADI required — essential nutrient. Excess is excreted in urine, producing the characteristic bright yellow color. Considered safe at any food-relevant level.
The detail
Educational information only. Not medical or dietary advice.