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Yeast

Good

Antioxidant

Yeast description

Large group of fungi that ferment sugars; yeast is a source of beta-glucan, which is a good antioxidant. The types of yeast used in cosmetic products are not harmful and in fact likely contribute to creating a healthier-looking skin surface due to their softening and conditioning action.

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Yeast references

  • International Journal of Molecular Sciences, September 2015, pages 21,575-21,590
  • Annals of Surgery, November 1994, pages 601-609

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings

Best

Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.

Good

Necessary to improve a formula's texture, stability, or penetration.

Average

Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.

Bad

There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.

Worst

May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.

unknown

We couldn't find this in our ingredient dictionary. We log all missing ingredients and make continuous updates.

Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.