Taken from the website :Niacinamide (Vitamin B3) is indicated to reduce the appearance of skin blemishes and congestion. A high 10% concentration of this vitamin is supported in the formula by zinc salt of pyrrolidone carboxylic acid to balance visible aspects of sebum activity.

This is a really awesome brand that sells its products cheaply but uses the best ingredients. And its Canadian!
This product I use all the time and have bought quite a few times. It really helps to diminish the look of acne. Its not a cure just a treatment. But I have mostly hormonal acne and I find this product really helps. I use it in the morning and night. And I also give it to my kids when they have acne. Its worth a try to anyone since its so inexpensive. I have quite a few products from this brand and its sister brands.