"Admittedly, I stock enough SkinCeuticals products to impress a Hoarders producer — that's how much I believe in them. But even I have had to take intermittent breaks with its retinol because the dosage was a little too harsh for my sensitive skin. Luckily, the brand just launched the SkinCeuticals Retinol 0.3 ($62) — a gentler version of its OG 1.0 and .5 percent formulas, which have already become the vitamin A workhorse in my entire routine." — KC