You step out of the pool feeling refreshed, but your hair tells a different story. It might feel dry, straw-like, or even have a strange greenish tint. That familiar post-swim texture is the direct result of chlorine, a chemical that’s great for keeping pools clean but not so great for your hair’s health.
Chlorine is a necessary disinfectant, but it’s also a harsh chemical that can strip your hair of its natural protections. Knowing exactly what it does helps you take the right steps to protect your locks before and after your swim.
How Chlorine Damages Your Hair
Think of your hair as being protected by a layer of natural oils called sebum. This layer keeps your hair shaft moisturized and smooth. Chlorine is a powerful oxidizer, which means it breaks down and strips away these protective oils. Once that barrier is gone, the chlorine attacks the hair’s protein structure, called keratin. This process leaves the hair cuticle—the outer layer—rough, porous, and vulnerable. The result is hair that feels dry, brittle, and more prone to tangling and breakage.
Can Chlorine Really Turn Hair Green?
It’s a common myth, but chlorine itself isn’t the main culprit for green hair. The real cause is usually copper, often from algaecides used in pool water or even from copper pipes. When chlorine oxidizes these tiny copper particles, they can bind to the protein in your hair, especially if it’s porous or light-colored, leaving behind a greenish film.
Simple Ways to Shield Your Hair
The good news is that you can easily prevent most chlorine damage. One of the best tricks is to wet your hair with fresh water before you swim. Soaking hair in clean water means it will absorb less chlorinated water. For even more protection, apply a leave-in conditioner or a light hair oil beforehand to create an extra barrier.
Caring for Your Hair After a Swim
After you get out of the pool, don’t wait until you get home to care for your hair. If possible, rinse your hair thoroughly with fresh water immediately. When you can, wash your hair with a gentle, clarifying shampoo designed to remove chlorine and mineral buildup. Following up with a deep conditioning treatment or mask will help restore lost moisture and smooth the hair cuticle back down.
With a little preparation and the right after-care, you can enjoy your time in the pool without worrying about the health of your hair. A quick pre-swim rinse and a thorough post-swim wash are your best defenses for keeping your hair soft and strong all summer long.