Polylactic Acid
What is Polylactic Acid?
Polylactic acid is a synthetic, biodegradable thermoplastic polymer produced through the fermentation of plant-based sugars like corn starch into lactic acid, followed by polymerization. In cosmetics, it appears as uniform spherical microbeads, serving primarily as an abrasive in exfoliating products such as facial scrubs, body polishes, and cleansing masks. These particles provide mechanical exfoliation by gently buffing away dead surface skin cells, promoting a smoother texture without the environmental persistence of traditional plastic microbeads. Its biocompatibility stems from its use in medical applications like sutures and dermal fillers. The material breaks down naturally via hydrolysis into lactic acid and water, making it an eco-friendly alternative. Typical particle sizes range from 100-600 microns to ensure mild action, enhancing product slip and cleansing efficacy while minimizing irritation potential.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Offers gentle physical exfoliation to remove dead skin cells.
Improves skin smoothness and texture with regular use.
Serves as a sustainable, biodegradable option over plastic alternatives.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals with dull or rough skin texture. | Those with very fragile or barrier-damaged skin. |
| People preferring mechanical over chemical exfoliants. | People experiencing active dermatitis or eczema. |
| Users seeking eco-friendly ingredients in daily cleansers. | Individuals sensitive to particulate exfoliants. |
Safety Notes
- Considered safe for topical cosmetic use by regulatory bodies.
- Low potential for irritation in typical formulations.
Frequently Asked Questions about Polylactic Acid
What is polylactic acid in skincare?
A plant-derived biodegradable polymer used as spherical particles for mechanical exfoliation in scrubs.
Is polylactic acid safe for skin?
Yes, it shows low irritation potential and biocompatibility in cosmetic applications.
How does it differ from plastic beads?
It biodegrades naturally, unlike non-degradable polyethylene microbeads.