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Moumoujus

POLYGAMMA-GLUTAMIC ACID.

Valuable / FILM FORMING, HAIR CONDITIONING, HUMECTANT

Polygamma-glutamic acid (PGA) is a potent biopolymer recognized for its exceptional hydrating capabilities within precision skincare formulations. It significantly helps the skin retain moisture, enhances plumpness, and contributes to a smoother, more resilient complexion by supporting the skin's natural architecture.

Summary

Humectant Film-forming Moisturizing Skin conditioning Smoothing

Science

Mechanism of Action

PGA functions primarily as a powerful humectant, efficiently drawing and retaining atmospheric moisture within the skin. It forms a protective, breathable film on the surface, significantly reducing transepidermal water loss (TEWL) and boosting overall hydration. Beyond surface hydration, PGA stimulates the skin's natural moisturizing factors (NMFs) like pyrrolidone carboxylic acid (PCA) and lactic acid, and may inhibit hyaluronidase, thereby preserving the skin's endogenous hyaluronic acid content. Further, it supports collagen production, promoting enhanced firmness and elasticity, and exhibits antioxidant properties against free radical damage. Emerging research also points to its potential for promoting cell growth and regeneration, and contributing to a more even skin tone by addressing hyperpigmentation. It can also optimize the absorption and penetration of other active ingredients.

Research

Clinical Evidence

High confidence
Effective range 0.3–3%
Optimal

3%

Key findings

  1. 01 Formulations containing 0.3-3% PGA significantly enhance skin hydration and water retention, demonstrating up to 45% retention for 120 minutes, which is superior to a control (40%) and glycerol formulations (13.5 vs. 7.5).
  2. 02 Studies indicate that concentrations from 0.3-2.5% support the skin's structural integrity, stimulating lipid production and epidermal renewal, leading to a smoother and plumper appearance.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 4 – 6
0 7 14

Stability

To maintain efficacy, PGA should be stored away from light, moisture, and heat. Elevated temperatures during manufacturing or storage may lead to racemization (transformation of L-glutamic acid units into D-form), potentially altering its characteristics and performance.

Synergies

  • Enhances absorption and penetration of other active skincare ingredients.

Conflicts

  • Potential for increased irritation or sensitivity when co-administered with potent active ingredients such as retinoids, alpha-hydroxy acids (AHAs), beta-hydroxy acids (BHAs), or Vitamin C, particularly in sensitive individuals.

Safety

Safety Profile

CIR Status
Not reviewed
Max tested
3%
Sensitization risk Low

PGA is generally recognized as non-toxic, biodegradable, and environmentally benign. Concentrations exceeding 3% are not advised, as they may compromise skin tissue integrity and induce redness. In a subset of individuals, notably those with sensitive skin, mild transient irritation, redness, or itching may occur.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Polygamma-glutamic acid is a valuable ingredient for advanced skincare, offering superior hydration, skin plumping, and structural support with a low risk profile.

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