The Ultimate Guide to Face Serums: What to Use and When

Serums deliver high concentrations of active ingredients in a lightweight format. Choosing and layering them correctly can transform your skin.

What Makes Serums Effective

Serums have smaller molecules and fewer occlusive ingredients than moisturizers, so actives penetrate deeper. Use them after cleansing and before moisturizer.

Vitamin C Serums

Best in the morning. They brighten, protect against free radicals, and support collagen. Look for stable forms like L-ascorbic acid or ethylated vitamin C.

Retinol and Retinoids

Use at night. They promote cell turnover and improve texture and fine lines. Start with a low percentage and build up; always use SPF during the day.

Hyaluronic Acid

Suitable morning and night. It draws moisture into the skin and plumps fine lines. Layer under heavier products and follow with moisturizer to seal in hydration.

Layering Order

Thinnest to thickest: vitamin C or other water-based serums first, then retinol (if at night), then peptide or nourishing serums, then moisturizer.

Consistency Is Key

Results from serums typically appear after 4–12 weeks of daily use. Stick to one or two actives at a time to avoid irritation.