Triclosan
INCI: TRICLOSAN
Reviewed by Kate · Last updated 14 Aug 2026
A synthetic purifying agent used to preserve formulations and reduce odour-causing bacteria
Best For Skin Types
All, Oily
Addresses
Effective Concentrations
Up to 1%
Usage Frequency
Daily
What Is Triclosan?
Triclosan is a synthetic antimicrobial compound that functions as both a preservative and deodorant agent in skincare formulations. It works by inhibiting bacterial growth, which helps extend product shelf life and reduce the formation of odour-causing bacteria on the skin's surface.
The ingredient has been used in cosmetics and personal care products for several decades. It is typically incorporated at low concentrations (usually under 1%) to achieve its preservative and antimicrobial effects.
How It Works
Triclosan works by disrupting bacterial cell membranes and interfering with microbial metabolism, which inhibits bacterial growth and reproduction. This dual action makes it effective as both a preservative (protecting the product itself) and a deodorant (reducing odour-forming bacteria on the skin).
When applied topically, it remains largely on the skin's surface rather than penetrating deeply, which limits its action to the immediate environment where odour-causing microorganisms thrive.
Clinical Evidence & References
Triclosan has a long history of use in personal care products and is generally recognised as effective for antimicrobial and preservative purposes. Studies demonstrate its efficacy in reducing bacterial counts on the skin and extending product stability.
However, concerns have emerged regarding its potential environmental impact, particularly its persistence in aquatic ecosystems and effects on non-target organisms. Some regulatory bodies have restricted or phased out its use in certain product categories due to these environmental considerations rather than proven safety issues in skincare use itself.
How to Use
Triclosan is typically found as a component in finished products rather than something used as a standalone ingredient. When selecting products containing it, standard application according to product instructions is sufficient. If using multiple antimicrobial products simultaneously, there is no additional benefit to combining them — one well-formulated product is adequate for maintaining skin hygiene.
Safety & Precautions
Frequently Asked Questions
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