E101 — Riboflavin
E101 (Riboflavin), a color, is rated "safe": no significant concern. Vitamin B2, used to give foods a yellow-orange color. The same molecule your body needs from diet, so there is essentially no toxicity ceiling.
What is Riboflavin?
Vitamin B2 in coloring form. Gives a yellow-orange tint to cereal, pasta, sauces, and some dairy. Naturally found in milk, eggs, and leafy greens.
What does it do to the body?
Your body uses it as an essential vitamin for energy metabolism, so any excess is simply absorbed or excreted. Bright yellow urine after a vitamin is usually riboflavin. No realistic safety concern from food-level exposure.
What regulators say
EFSA and the FDA both treat it as a safe additive without a numerical acceptable daily intake because it is a nutrient.
Risk rating: Safe
Cleared by EFSA with no significant concern at typical dietary exposure. Common, well-studied, and not a reason to put a product back on the shelf.