Perms vs. Relaxers: Which Is Less Damaging to Your Hair?

Chemical Mechanisms

Perms – Thiol compounds (ammonium thioglycolate) break disulfide bonds; hair reshaped on rods; neutralizer reforms bonds. Reversible over time.
Relaxers – Strong alkalis (sodium hydroxide, guanidine hydroxide) permanently break disulfide bonds; hair straightened irreversibly. Higher pH = more damage.

Damage Comparison

Long-Term Hair Health

Professionally done perms cause less structural damage. Relaxers carry higher risk of breakage, thinning, scalp burns, and irreversible texture change.

Recommendation

Consult a licensed stylist. Discuss hair history, porosity, and goals. Consider keratin smoothing or heat styling as lower-commitment alternatives.

Hair Loss - Related Articles

Aspect	Perm	Relaxer
Bond Breakage	Partial, temporary	Complete, permanent
pH	~8–9.5	12–14 (lye)
Scalp Irritation	Lower risk	High risk (burns)
Breakage	Moderate	High, especially with overlap
Reversibility	Grows out	Must grow out; transition difficult