★Does Lactobionic Acid have any potential safety risks or prohibited uses?
Lactobionic Acid has no identified potential risk substances and is safe for cosmetic use when applied within the regulatory limits and under normal, reasonable, and foreseeable conditions. It is non-toxic, non-irritating when used properly, and does not cause photosensitivity easily (unlike strong AHAs), though daily sunscreen is still recommended for products with exfoliating properties. It is not prohibited in any cosmetic category, but avoid using it in products for severely inflamed or broken skin.
★What is the solubility of Lactobionic Acid for cosmetic formulation?
Lactobionic Acid is soluble in water and ethanol, and meets cosmetic-grade quality standards with no harmful impurities.
★What is the recommended addition amount of Lactobionic Acid in different cosmetic products?
The recommended addition amount varies by product type and efficacy requirements, while complying with the maximum limit of 6% (calculated as acid):
- Toners, essences, and light lotions: 0.5% - 2.0% (for gentle hydration, soothing, and mild exfoliation);
- Moisturizing creams, serums, and sheet masks: 2.0% - 4.0% (for enhanced hydration, barrier repair, and antioxidant protection);
- Exfoliating products (e.g., peels, exfoliating pads): 4.0% - 6.0% (for effective yet gentle exfoliation, without exceeding the regulatory limit);
- Post-medical beauty repair products: 2.0% - 3.0% (for soothing, repairing, and reducing irritation).
★What is the ideal pH range for formulating products with Lactobionic Acid?
The ideal pH range for Lactobionic Acid to exert its efficacy while ensuring skin compatibility is 3.5 - 5.5. This range matches the skin’s natural pH, helps maintain the stability of Lactobionic Acid, and avoids skin irritation. If the product pH is too low (below 3.5), it may cause stinging; if too high (above 5.5), the exfoliating and hydrating efficacy of Lactobionic Acid will be reduced. It is recommended to adjust the pH with neutralizers (e.g., triethanolamine) during formulation.
★Which cosmetic products are most suitable for adding Lactobionic Acid?
Sensitive skin care products (toners, serums, moisturizers): Its large molecular weight ensures slow skin penetration and low irritation, ideal for soothing sensitive and reactive skin;
- Hydrating and moisturizing products (sheet masks, overnight creams): Its humectant properties help attract and retain moisture, improving skin dryness and dehydration;
- Exfoliating products (gentle peels, exfoliating lotions): Suitable for beginners or those with sensitive skin who cannot tolerate strong AHAs/BHAs;
- Anti-aging products (serums, creams): It promotes collagen synthesis, improves skin firmness, and reduces the visible signs of aging;
- Post-medical beauty repair products (soothing gels, repair masks): Helps soothe irritation and repair the skin barrier after laser, micro-needling, or chemical peeling.
★Is Lactobionic Acid compatible with other common cosmetic ingredients?
Yes
Compatible ingredients: Niacinamide, hyaluronic acid, ceramide, vitamin C (ascorbic acid), Centella asiatica extract, and other soothing, hydrating, and antioxidant ingredients (synergistically enhance efficacy);
- Incompatible/need caution: Avoid mixing with high-concentration retinol (may increase irritation) and strong exfoliants (e.g., high-concentration glycolic acid, salicylic acid) to prevent excessive exfoliation and skin barrier damage;
★What precautions should we take when adding Lactobionic Acid during production?
1. Add Lactobionic Acid to the water phase of the formula, and stir until fully dissolved (it is water-soluble, so avoid adding to the oil phase);
2. Add it at a temperature below 60℃ to prevent thermal decomposition and loss of efficacy (preferably add after cooling the water phase to 40-50℃);
3. Adjust the product pH to 3.5-5.5 after adding Lactobionic Acid to ensure its stability and skin compatibility;
4. Conduct stability tests (high temperature, low temperature, cyclic temperature) after formulation to confirm that the product does not stratify, discolor, or degrade during storage.