Formulation · 6 min read
Preservative Compatibility with Glycolic Acid
Which preservative systems hold up at the low pH required for active AHA formulas.
Updated 11 June 2026 · Reviewed by GlycolicAcid.com.au editorial
Phenoxyethanol + ethylhexylglycerin remains the most reliable broad-spectrum system at pH 3.5–4. Avoid pure parabens (unstable) and organic acids that compete with the AHA.
Continue reading