Alternative Acids for pH Adjustment in Long-Lash Formulas

If you cannot use AHA in your long-lash formula and need to lower the pH, Citric Acid is a suitable alternative. It is a cosmetic-grade acid commonly used for pH adjustment in various cosmetic products.

When using Citric Acid, add a small amount gradually and measure the pH until you reach the desired level for your formula. Citric Acid dissolves easily in water.

Regarding distilled vinegar (acetic acid), it is generally not recommended for use in cosmetic formulations, especially for products applied near the eyes like long-lash serums. Food-grade vinegar may contain impurities and is not formulated or tested for cosmetic safety and efficacy. Using ingredients not specifically intended for cosmetic use can lead to irritation or other adverse reactions.

Formic Acid was also found in the search, but its description indicates it can be irritating and is used for skin peeling or wart removal, making it less suitable for a sensitive area like the eyelashes.