"Retinol and niacinamide are a powerhouse combination," says Corey L. Hartman, board-certified dermatologist and founder of ...

Dyson hair straighteners, Olay wrinkle creams, and more PEOPLE Tested beauty products are discounted during Amazon’s Holiday Beauty Haul Sale. We also spotted one of the best shampoos for thinning ...

These soothing, hydrating creams from CeraVe, La Roche-Posay and more work for a wide range of skin types — and budgets.