vitamin
Vitamin B3
Vitamin B3 comes in two forms that behave differently. Nicotinic acid (plain niacin) affects cholesterol and causes flushing. Nicotinamide does neither and is the one used on skin. A label saying only "Niacin" has not told you which.
Choose the right form
Not all forms of Vitamin B3 do the same thing. The form determines what it’s absorbed by and what it’s good for.