Coildex · Products · Ingredient Checker · Learn Hair care, explained simply How to tell your hair porosity (and why the float test gets it wrong) — Porosity matters more than curl type when choosing products. Learn the real signs of low, medium, and high porosity hair, and skip the unreliable float test.Why glycerin makes your hair frizzy in summer — Glycerin and other humectants pull water from the air. Learn how dew point decides whether they help or cause frizz, and what to use instead.Are silicones bad for curly hair? It depends on your porosity — Silicones aren't all bad. Learn which hair types benefit from silicones, which build up, and how to tell water-soluble silicones from heavy ones.Protein overload vs. moisture overload: how to tell — Stiff and straw-like, or mushy and limp? Learn the signs of protein overload and moisture overload in curly hair, and how to rebalance.Co-wash, low-poo, or clarifying? Picking a cleanser for curly hair — Learn the difference between co-wash, sulfate-free low-poo, clarifying, and chelating shampoos, and which suits your porosity and scalp.