Question:
What is the purpose of using a serum under a moisturizer, and is it really necessary? Also, what’s the best moisturizer to use?
Answer:
The main function of a moisturizer is to combat dryness and make your skin feel more comfortable. However, moisturizers don’t prevent wrinkles or slow aging. If your skin isn’t dry, you don’t need a moisturizer. Also, using the wrong moisturizer on acne-prone skin can actually make things worse. Moisturizers work by locking in water and natural oils, and the best time to apply one is immediately after you shower, while your skin is still damp.
Serums, on the other hand, are a concept largely marketed by the cosmetic and beauty industries. They are said to contain smaller molecules or nutrients that can penetrate the skin more effectively than a regular moisturizer. The issue with this claim is that the skin’s outermost layer (epidermis) has barriers that often prevent these nutrients from fully absorbing into the deeper layers of the skin.
Some dermatologists believe certain ingredients in serums, like vitamin C, antioxidants, growth factors, retinoids, and glycolic acid, may temporarily improve the appearance of wrinkles and signs of aging. Many people find that using these products makes their skin feel better, look brighter, and seem tighter and less sun-damaged.
For moisturizers, the best options are those that effectively hydrate your skin. Popular, dermatologist-approved brands like Cetaphil, Cerave, Eucerin, and Neutrogena are safe, effective, and budget-friendly. If you have acne-prone skin, opt for an oil-free moisturizer. To help with aging prevention, look for moisturizers with sunscreen to protect your skin from harmful UV rays.