No skincare routine is complete without a moisturizer. The important face product is responsible for replenishing your skin’s moisture levels, helping to keep it strong and healthy in return. This is especially true if you’re over 30, a milestone age for the skin that brings new concerns that need to be addressed. “You have to get a full-body skin exam by a dermatologist by the time you turn 30. It’s important to have expert eyes take a look at any moles you may have and be able to follow them for changes in the future,” Elizabeth Tanzi, M.D., tells Byrdie.