Dr. Elise Olsen and associates (Olsen et al., 1997) discovered that reducing the frequency of tretinoin 0.05% cream from once daily to 3 times per week maintains, and in some cases, possibly ...

Though experts are quite sure exactly how retinol may regulate the production of sebum—an oily, waxy substance produced ...

The key is to go low and slow: a pea-sized amount of a low-concentration product (0.1%) once or twice a week, preferably at ...