Niacin and niacinamide are two forms of vitamin B3. Niacin can cause a mild warming flush on the skin, which is one reason it is used in scalp products meant to feel stimulating. Niacinamide is gentler and common in skin care.
In a rinse-off shampoo they are supporting ingredients that make the scalp feel cared for, alongside the headline actives.
Where to find it
B3 appears in Regenepure DR, Hims Thick Fix and Nioxin System 2.
Shampoos with niacin and niacinamide
Top pick
Best overall
- Maker
- Regenepure
- Size
- 8 oz
- Typical price
- $35.00 · $4.38/oz
- Key ingredients
- 4 of 5
- Ketoconazole with saw palmetto, caffeine, emu oil, niacin and vitamin B6
- No sulfates or parabens
- Recommended and dispensed by hair transplant surgeons and dermatologists for post-op care
- Pairs with Regenepure NT on alternate days
Shop Regenepure DR → · Full review
Cheapest saw palmetto
- Maker
- Hims
- Size
- 6.4 oz
- Typical price
- $12.96 · $2.02/oz
- Key ingredients
- 2 of 5
- Saw palmetto with niacinamide
- No sulfates or parabens, vegan
- Smallest bottle here
Check price for Thick Fix → · Full review
Salon three-step system
- Maker
- Nioxin
- Size
- 10.1 oz
- Typical price
- $20.49 · $2.03/oz
- Key ingredients
- 3 of 5
- Caffeine, biotin, niacin and peppermint
- Step one of a shampoo, conditioner and treatment system
- Uses a sulfate cleanser
Check price for System 2 Cleanser → · Full review
