I’m using tretinoin to help with fine lines/wrinkles and I haven’t had any peeling or skin irritation. Should I increase my strength?

Skin peeling is not necessary for tretinoin to work. Unlike acne, higher strengths do not necessarily provide more benefit. A very good study showed that tretinoin 0.025% and 0.1% had the same skin rejuvenating benefits after one year, but the higher strength caused more irritation. It’s best to stick with a strength that your skin can easily tolerate and use it regularly.