Ingredient Guide

Beta Glucan

Also known as: Beta-Glucan, β-Glucan, Oat Beta Glucan, Sodium Carboxymethyl Beta-Glucan, Beta 1,3/1,6 Glucan

All skin typesSensitiveReactiveDryDehydratedOily

What It Is

A polysaccharide derived from oats, yeast, or other natural sources that functions simultaneously as a powerful skin-calming active, humectant, and immune-modulating support ingredient in cosmetic use.

What It Does

Beta glucan deeply hydrates through water-retaining (humectant) properties, signals keratinocytes and fibroblasts to reduce inflammatory cytokine activity, and modulates skin immune response — making it effective for calming visible redness and sensitivity while maintaining serious moisture retention. Research suggests some beta glucan forms also support collagen synthesis.

Best For

Sensitive skinRednessDehydrationBarrier supportCalmingGel moisturizer hydration

Benefits

  • Powerful humectant: attracts and retains water comparable to hyaluronic acid
  • Anti-inflammatory: reduces pro-inflammatory cytokine activity at the cellular level
  • Immune-modulating: supports skin immune response and reduces reactivity
  • Collagen-supportive: some research indicates fibroblast-stimulating properties
  • Non-sensitizing: one of the most tolerated calming actives, suitable for reactive skin

When to Be Careful

  • Less studied in cosmetics than HA despite similar or superior hydration mechanisms
  • Often underdosed in premium-branded products — concentration matters
ItGirlies Ingredient Intelligence
Why This Gets Hype

Beta glucan is arguably undervalued in Western skincare. The research on its hydration and anti-inflammatory properties rivals hyaluronic acid, and its immune-modulating function addresses a concern that HA doesn't touch. Its rise in The Ordinary's NMF formula brings it to a price point where its real performance can be tested widely.

What People Often Misunderstand

Beta glucan is often seen as just a soothing botanical. It is a clinically active anti-inflammatory and humectant with a stronger research base than most "calming" ingredients. It's not just a bonus addition — in gel moisturizers, it's doing significant work.

Best Routine Slot

Moisturizer step — morning and evening. In a gel texture, it sits comfortably under SPF.

Good Match For

Oily, combination, and sensitive skin wanting a gel moisturizer that doesn't just hydrate — it actively calms.

Proceed Carefully If…

No known concerns — one of the most tolerated cosmetic ingredients.

Signs You May Be Overdoing It

No signs of overuse.

Commonly Found In

MoisturizersGel MoisturizersCalming SerumsBarrier Creams

Products Containing Beta Glucan

Natural Moisturizing Factors + Beta Glucan
The Ordinary

FAQs About Beta Glucan

What does beta glucan do in skincare?
Beta glucan is a multi-mechanism ingredient: it attracts water (humectant), reduces inflammatory cytokine activity (anti-inflammatory), and modulates skin immune response. It's effective for both hydration and calming visible redness.
Is beta glucan better than hyaluronic acid for hydration?
Some research suggests comparable or superior surface hydration. They work through different mechanisms and are complementary rather than competitive. Both in a formula is genuinely additive.
Is beta glucan good for sensitive skin?
Yes — it is one of the most well-tolerated calming actives. Its anti-inflammatory and immune-modulating properties make it specifically useful for reactive and sensitive skin types.
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