What is Niacinamide?

Niacinamide, also called Vitamin B3 or nicotinamide, is a water-soluble vitamin widely used in skincare. It is one of the most researched ingredients in dermatology, with decades of published clinical data behind it. One reason it has become so widely used is that, at the concentrations found in skincare, it tends to be far less irritating than other proven actives like retinoids or exfoliating acids, which makes it easier to use daily for most people. Niacinamide is included in INTOIT's 6X Complex Face Serum, where it works alongside peptides and caffeine to support an even, healthy-looking complexion.

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How Does It Work?

Niacinamide (vitamin B3) works in a few ways at once. It helps skin cells make more ceramides, the natural fats that lock in moisture and hold the skin barrier together, so skin feels less dry and holds up better against everyday irritants. It also calms redness and irritation by dialing down the skin's inflammatory response, which is why it works well on acne-prone and sensitive skin without the sting that some other actives cause.

On oilier skin, niacinamide helps regulate how much oil the skin produces, which is part of why pores look smaller and skin looks less shiny with regular use. For tone, it has been shown to fade the look of dark spots, redness, and yellow-toned dullness, so it is often described as an all-round tone-evening ingredient rather than one that only targets a single type of discoloration.

Most niacinamide products use it at a concentration between 0.5 percent and 5 percent. This range shows up again and again in studies as the sweet spot: strong enough to see real results, without the irritation that can come from pushing an active too high.