Try this
Niacinamide is vitamin B3, also known as nicotinamide, and can be used as an acne treatment that is available over the counter, without having to see a doctor or nurse. Niacinamide can be found in topical treatments that are applied directly to the skin.
I copied this but my skin doctor recommended it to help get rid of sun damaged skin. I take 1000mg daily and also have it in a lotion. Warning though - don’t get vitamin B3 Niacin as it causes hot flushes.