When it comes to lightening dark hair, not all bleach lighteners are created equal. As a professional hair educator with over 20 years of experience behind the chair, I’ve tested over 50 professional bleach lighteners on Level 2 swatches—yes, very dark brown—to find out which ones truly perform the best.

Using the Manelli Scale, a professional rating system I developed specifically to evaluate bleach lighteners, I scored each product across 10 critical categories to determine the best hair bleach on dark hair.

If you’ve ever wondered which bleach can lift the most, maintain hair integrity, or won’t leave your salon smelling like a chemistry lab—this guide is for you.