Vinegar

Vinegar is an acidic liquid produced through fermentation, most commonly from apples, grains, or other carbohydrate sources. The acetic acid content (typically 4-8% in culinary vinegars) is responsible for its chemical properties and potential skincare effects. In cosmetic formulations, vinegar is used at much lower concentrations, usually between 1-5%.The ingredient has a long history in folk remedies and is included in a small proportion of commercial skincare products. Its primary functions in skincare relate to its antimicrobial and antioxidant properties, which are attributed to the ac…

The acetic acid in vinegar lowers skin pH, creating an environment less favourable for certain bacteria and fungi. This acidic environment may also support the skin's natural defence mechanisms. Additionally, vinegar contains antioxidant compounds that can help neutralise oxidative stress on skin cells.However, the specific mechanisms by which vinegar benefits skin conditions remain incompletely understood. Most evidence comes from traditional use rather than extensive modern clinical study.

Vinegar should always be diluted before applying to skin; undiluted vinegar can cause irritation and damage. In skincare formulations, it is typically incorporated at 1-5% concentration. If using vinegar at home, dilute thoroughly with water (usually 1:1 or more dilute) and perform a patch test first. Application frequency depends on skin tolerance and the specific condition being addressed; start conservatively and adjust as needed.

Vinegar is generally well-tolerated when properly diluted, but undiluted or inappropriately concentrated applications can damage the skin barrier, cause irritation, and lead to erythema or burning. Those with sensitive skin or compromised barriers should exercise caution and seek guidance before use.