Chlorhexidine
klor-HEX-ih-deen
What Is Chlorhexidine?
A broad-spectrum antimicrobial agent commonly used in medical settings. In hair care, it appears in some anti-dandruff and scalp treatment products at very low concentrations.
Source: Synthetic pharmaceutical compound
Origin: Synthetic
Also known as: Chlorhexidine Digluconate, CHX
What Does Chlorhexidine Do to Your Hair?
Provides powerful antimicrobial activity against bacteria and fungi on the scalp. Used in specialized scalp treatments for conditions like seborrheic dermatitis and bacterial folliculitis.
Best For
Dandruff-prone scalp, scalp infections, seborrheic dermatitis
Not Recommended For
Color-treated hair (can discolor), sensitive scalp
Concentration Matters
0.05-0.5% in scalp products
Hair Type Compatibility
Method Compatibility
Safety & Regulation
Safe at low cosmetic concentrations. Can cause tooth staining in oral products and rare allergic reactions including anaphylaxis in medical settings. Scalp product concentrations are much lower than medical use.
FDA Status: Approved
FDA-approved as an antimicrobial agent. Used in both medical and cosmetic applications.
EWG Score: 4/10
HairAide Verdict
A medical-grade antimicrobial that works well for scalp conditions but is overkill for regular hair care. Use only when you have a specific scalp condition that warrants it, and under professional guidance.
Products That Contain Chlorhexidine
Scalp treatments, medicated shampoos, anti-dandruff products
Alternatives to Chlorhexidine
If you want to avoid Chlorhexidine, look for products with these ingredients instead:
Piroctone Olamine, Zinc Pyrithione, Tea Tree Oil
Frequently Asked Questions
Chlorhexidine has a safety rating of 6/10. It's generally acceptable but may cause issues for some hair types. Safe at low cosmetic concentrations. Can cause tooth staining in oral products and rare allergic reactions including anaphylaxis in medical settings. Scalp product concentrations are much lower than medical use.
Chlorhexidine is not CG-method approved. Curly hair types may want to avoid this ingredient or use products containing it sparingly.
No, Chlorhexidine is not approved for the Curly Girl method.
Some alternatives to Chlorhexidine include: Piroctone Olamine, Zinc Pyrithione, Tea Tree Oil
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