Glossary
A waxy, crystalline compound derived from the wood of the camphor tree (Cinnamomum camphora) or synthesized from turpentine. Camphor is used in topical analgesic products, chest rubs, and certain skincare products for its cooling, mildly anesthetic, and decongestant properties. It is effective but requires careful dosing due to toxicity at higher concentrations.
Camphor activates TRPM8 cold receptors and TRPA1 ion channels, producing a cooling and mildly numbing sensation that provides relief from pain, itching, and irritation. It is a primary ingredient in products like Vicks VapoRub, Tiger Balm, and numerous pain-relief creams.
For skincare, camphor's cooling and mildly antiseptic properties make it useful in products for itchy skin, insect bites, minor burns, and muscle aches. It also acts as a mild counter-irritant: the cooling sensation distracts nerve endings from pain signals.
Camphor is toxic when ingested and can cause seizures, especially in children. Even topical application at concentrations above 11 percent can cause skin irritation, and systemic absorption through damaged skin can produce toxicity. The FDA limits camphor concentration in OTC products to 11 percent.
In skincare, camphor should be used in properly formulated products at safe concentrations rather than applied as a pure substance. It should be avoided on broken or inflamed skin, around the eyes, and in products intended for use on children under 2 years.
At concentrations below 3-5 percent in properly formulated products, camphor is generally safe for topical use on intact skin. It should not be applied to broken skin, used on infants, or ingested. Follow product directions and never apply pure camphor to large skin areas.
Camphor activates the same nerve receptors (TRPM8) that respond to menthol and physical cold. The sensation is neurological rather than thermal; camphor does not actually lower skin temperature; it triggers your nerves to report a cooling sensation.
Camphor has mild antimicrobial and astringent properties, but it is too irritating for regular facial use on acne. Modern acne treatments (salicylic acid, benzoyl peroxide) are more effective and better studied. Camphor is more appropriate for muscle aches and insect bites.
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