Natto Gum
Polyglutamic acid from fermented natto soy. Forms a hydrating film and holds water more efficiently than hyaluronic acid.
Evidence by route
Topical application
Japanese brands favor natto gum for a visible lifting effect right after application. Long-term data stays limited to marketing publications.
How to read tiers A–F
- CWeak evidence. In vitro data, open-label studies, or expert consensus
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Oily, Combination, Sensitive
About this ingredient
Natto Gum (Polyglutamic Acid) is a polymer of L-glutamic acid, a by-product of soybean fermentation by Bacillus subtilis in the production of traditional Japanese natto. In cosmetics – a powerful humectant. Mechanism. Binds water 4–5 times more efficiently than hyaluronic acid by mass. Forms an invisible film on the skin that retains moisture. In parallel inhibits hyaluronidase, protecting endogenous hyaluronic acid from degradation. Where applied. Korean and Japanese moisturizing serums and creams. In Europe – in niche lines, less in mass market. Concentration 0.1–2%. Evidence base. Few clinical RCTs – Bem 2003 (n=20) showed 50% skin moisturization increase 2 hours after 0.5% natto gum application. Long-term evidence is still insufficient. Safety. Hypoallergenic (the soy allergen is processed by fermentation), non-comedogenic. Pregnancy and lactation – topically safe.
Frequently asked questions
Is Natto Gum safe during pregnancy?
Natto Gum is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Natto Gum for?
Natto Gum suits: normal, dry, oily, combination, sensitive.
What is Natto Gum and what does it do in cosmetics?
Polyglutamic acid from fermented natto soy.
What's the INCI name for Natto Gum?
The INCI name is Natto Gum. It may also appear as: Polyglutamic Acid, Bacillus/Soybean Ferment Extract.
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