PG-Hydrolyzed Collagen

What Is PG-Hydrolyzed Collagen?

Propylene glycol ester of hydrolyzed collagen — collagen peptides modified with PG to improve water solubility and skin penetration. Provides moisturizing, film-forming, and skin-conditioning benefits. The PG modification makes the collagen fragments more soluble and less sticky than unmodified hydrolyzed collagen.

Key Skin Benefits

• + Moisturizing — PG-collagen attracts and retains water in skin
• + Film-forming — creates a breathable protective layer on skin and hair
• + Anti-aging — collagen peptides may signal skin repair processes
• + Improved solubility — PG modification prevents gelling and precipitation issues

Pros

• + Better water solubility than unmodified collagen
• + Less sticky/tacky feel in formulations compared to plain collagen
• + Collagen peptides support skin conditioning and moisture retention
• + Good compatibility with most cosmetic formulation types

Cons

• − Collagen peptides are too large to penetrate intact skin barrier
• − Animal-derived if from bovine or porcine sources — may not be halal/vegan
• − PG modification reduces the 'natural' positioning of the ingredient
• − Limited evidence for collagen synthesis stimulation from topical application
• − Marine collagen alternatives available for vegan formulations

Specifications

Safety Ratings

Regional Regulatory Limits

Typical Usage % by Product Type

References

1. CIR Safety Assessment. https://www.cir-safety.org/
2. EU CosIng Database. https://ec.europa.eu/growth/tools-databases/cosing/
3. EWG Skin Deep. https://www.ewg.org/skindeep/
4. INCIDecoder. https://incidecoder.com/