The Truth About "Safe" Henna — What Manufacturers Don't Always Tell You
What Manufacturers Don't Always Tell You Every few months, someone posts a story online about a bad reaction to henna. Burned scalp. Hair falling out in patches. A rash that lasted weeks. And almost every time, the product they used had the words "100% natural" printed right on the front. So what's going on? The issue isn't henna itself. Real henna — the kind that henna manufacturers have been producing for centuries — is a plant. It's dried, ground Lawsonia inermis leaf. Nothing added. Nothing hidden. Used correctly, it has a long and well-documented history of safe use across South Asia, the Middle East, and North Africa. The problem is what happens between the farm and your bathroom shelf. When demand grows fast, some henna powder manufacturers take shortcuts. They add chemicals to make the color darker, last longer, or apply more easily. The most common culprit is PPD — para-phenylenediamine. It's a synthetic compound used in conventional permanent ...