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“When the bleach comes in contact with the heavy metals from the henna, uncontrollable reactions can occur with high heat, which can burn the consumer or dissolve the hair.” Yikes. It’s very difficult to remove heavy metals when the henna is processed to make it ready for coloring the hair,” says George. “Henna, like all plant-based materials, contains heavy metals due to growing in soil. You can run a risk of facing henna’s dark side if you attempt the latter. “It should also be noted that hair will not lift with bleach easily after using henna, so you need to go a shade darker, rather than lighter.” Henna is very hard to lift out of your hair later,” says Chris Appleton, a celebrity hairstylist whose clients have included Kim Kardashian West and Jennifer Lopez. “Keep in mind that if you want to dye your hair later, it may be difficult to go lighter in color. These can be blended together to create natural shades of brown, or a reddish color,” explains George.īut there is a reason why stylists often suggest avoiding henna, even if it’s one of the more natural options. “The only ‘natural’ hair dye that exists is based on henna, cassia, or indigo extracts. Sorry: Natural Hair Dye Doesn't ExistĪt least, not in the traditional sense.

Regarding semi-permanent and permanent hair color, VP of Research and Development and Color Chemist at John Paul Mitchell Systems Valerie George says, “There is no such thing as organic.” So, does that mean it’s not clean, or safe? We turned to the experts to separate fact from fiction. We’re talking about hair dye, those oh-so tempting chemicals that promise the hair color of your dreams.

Just about every facet of your haircare routine can be clean and organic-except for the one you probably spend the most time, money, and energy on.