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Ingredient Receipt · Hydrators

Glycerin

INCI: Glycerin

Glycerin (glycerol) is one of the most studied, least hyped humectants in skincare. What it does, why it’s in almost everything, and who benefits most.

A clear, viscous drop of glycerin on a small spoon
Illustrative image

01 · In plain English

Glycerin is near the top of most moisturizer ingredient lists. It rarely gets marketing attention, but it does a lot of the work.

02 · What it does

Glycerin is a humectant that attracts water to the outer layer of skin. It also occurs naturally in skin and plays a role in barrier function and hydration.

It’s inexpensive, stable and well tolerated, which is why so many formulas use it as a base hydrator.

03 · Who it’s for

  • Dry, dehydrated and sensitive skin.
  • Anyone looking for a budget-friendly, fragrance-free moisturizer.

04 · What the evidence says

  • Improving skin hydration and barrier function as part of a moisturizer.well-supported

05 · Myths, checked

  • “Glycerin pulls water out of your skin in dry air.”

    In a well-made moisturizer, glycerin is paired with emollients and occlusives. In practice glycerin-containing moisturizers improve hydration.

    limited evidence

06 · Insufficient evidence

  • “Pure glycerin” applied neat as a better option than a formulated moisturizer. It can feel sticky and isn’t what the studies used.

07 · How to use it

  • Already in most moisturizers. Look for it high on the ingredient list in simple, fragrance-free formulas.
  • Apply moisturizer to slightly damp skin after cleansing.

08 · Pairs well / go carefully

Pairs well with

Go carefully with

  • No known clashes.

The Receipt

  1. 01The quiet workhorse of moisturizers. Boring and effective.

Education, not a diagnosis. If something changes quickly, hurts, bleeds, or worries you, see a dermatologist.

Sources (3)
  1. Fluhr JW, Darlenski R, Surber C. Glycerol and the skin: holistic approach to its origin and functions. Br J Dermatol. 2008.
  2. van Zuuren EJ, et al. Emollients and moisturisers for eczema. Cochrane Database Syst Rev. 2017.
  3. American Academy of Dermatology. Dermatologists’ top tips for relieving dry skin.

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