Ingredient
Cyanocobalamin
Vitamin B12
What it is
The synthetic, stable form of vitamin B12 used as a skin-conditioning active.
How it works
Topically it is thought to support the skin surface's general condition, though most evidence for vitamin B12's skin benefits comes from oral/systemic research rather than dedicated topical trials.
What it does
Skin conditioning
Concerns to know
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Well tolerated
No significant safety concern is reported for this ingredient as used in cosmetics.