Boric Acid
Boric acid is a weak acid derived from boron, a naturally occurring element. In cosmetics, it is primarily used for its antiseptic and antifungal properties. It can also act as a pH buffer, helping to maintain the stability of a product's acidity or alkalinity.
AntisepticVegan
BenefitMinimal 0.8 / 4
Soothing i0.5 / 4
Whether it can calm the skin — linked to less redness, irritation, discomfort, or visible reactivity.
RiskHigh 2.5 / 4
Systemic exposure i2 / 4
Whether it has meaningful potential to be absorbed into the body at levels that may matter biologically. Most cosmetic ingredients score low unless there is known concern or high exposure.
Irritation i1.5 / 4
Risk of short-term irritation — stinging, burning, dryness, redness, or discomfort. Common for strong actives, acids, retinoids, fragrances, and harsh surfactants.
Rated by SpottyLabs' ingredient methodology, independent of brands.
What it helps with
- Antiseptic properties
- Antifungal properties
- pH buffering
Things to watch
- Potential for irritation at higher concentrations
- Systemic toxicity if absorbed in large amounts
- Not safe for use on broken skin or internally
See how this matches your skin
Find out exactly what you put onto your skin. Scan any product before you buy. Free and independent — no brand is paying us. Available on Android and iOS.
Frequently asked questions
- Is boric acid safe for skin?
- Boric acid can be safe for topical use in low concentrations and on intact skin. However, it should not be used on broken skin or ingested, as it can be toxic if absorbed systemically.
- What is the primary use of boric acid in cosmetics?
- In cosmetics, boric acid is mainly used for its mild antiseptic and antifungal properties, and as a pH adjuster to help stabilize product formulations.
