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Ingredient · Vitamin Mineral

vitamin b1 (thiamin mononitrate)

Cleaner · 8/10, higher is cleaner

How we reached this

Thiamin / vitamin B1 — essential cofactor for carbohydrate metabolism. No upper limit.

Sources · 1

Also listed as

vitamin b1

Products containing this · 9

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-25.