The One Hair Product You Should NEVER Use Because It Causes Thinning Hair

If you have thin hair, you should completely avoid using co-wash or two-in-one shampoo and conditioner products.
This is because these two-in-one products are loaded with ingredients that do not wash out easily and therefore leave behind heavy buildup and residue. This chemical buildup can lead to thin hair because it blocks the hair follicle and stunts new growth.

"Some shampoos are worse than others because the ratio of cleansing agents versus ingredients that don't easily rinse off (i.e. silicones, conditioners etc.) is weighted heavily toward the conditioning side, not the cleansing side,” said Gail Federici, founder of Color Wow and co-founder of John Frieda, to New Beauty. 

When co-wash products like this only focus on conditioning and not cleansing, the chemical ingredients don’t ever get completely rinsed out of your scalp. Shampoos and conditioners, co-wash or otherwise, containing sulfates, silicones, and pearlizing agents should be avoided to reduce scalp buildup.

Shop Safe Sulfate-Free Shampoos

Briogeo Be Gentle Be Kind™ Matcha + Apple Replenishing Superfood Shampoo ($28)

Living Proof Perfect Hair Day Jumbo Set ($79)

Kérastase Discipline Sulfate Free Smoothing Shampoo ($33)

Bumble And Bumble Hairdresser’s Invisible Oil Shampoo ($31)