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Serum vs moisturiser: what's the difference and do you need both?

Serums treat, moisturisers protect. Here's how to use each, and when you can skip one.

5 min read · Updated September 27, 2026
Key takeaways
  • Serums are lightweight and carry concentrated actives.
  • Moisturisers are richer and seal hydration in.
  • Serum first, moisturiser second.

The difference

SerumMoisturiser
TextureThin, lightRicher cream or lotion
JobDeliver actives (like peptides)Hydrate and seal
OrderFirstAfter serum

Do you need both?

  • Oily skin: a serum alone may be enough, especially in humid weather.
  • Normal or combination: a light moisturiser over your serum.
  • Dry skin: always follow with a moisturiser.

Where DOSE fits

DOSE is your serum step: it carries the peptides. Follow with the moisturiser your skin likes. See skincare layering order.

FAQ

Should serum go before or after moisturiser?

Before. Apply serum to clean skin, then moisturiser.

Can a serum replace moisturiser?

For some oily skin types, yes. Most people benefit from both.

How long should I wait between serum and moisturiser?

About a minute, until the serum has mostly absorbed.

This article is for general information only and isn't medical advice. DOSE is a cosmetic product and is not intended to diagnose, treat, cure or prevent any disease. Individual results vary.