How can you stimulate collagen production in skin? Four skin experts share five ingredients known to slow collagen loss—plus the best products to shop.

Better hair starts with scalp care—and the best scalp serums offer easy to apply formulas that hydrate, detox, or promote hair growth (or all of the above).

Derms say that a good hand cream for older women protects the skin barrier, improves hydration, and is elegant enough to use consistently. Shop our favorite formulas.