The goal here is to replenish your hair's lost lipids and seal the cuticle so moisture doesn't escape again. Switching products as the seasons change is a must for women over 50: the best options include ultra-hydrating, sulfate-free shampoos and conditioners every 2-3 days, as well as targeted masks a few times a week. They can help moisturize fibers from the inside out by restoring their natural oil levels that may have been lost after the summer.