Busting the myths about using henna to dye your hair

Henna has been used as a natural hair dye for thousands of years, yet it remains one of the most misunderstood beauty treatments today. From ancient Egypt to modern salons, this plant-based dye continues to spark debates filled with misconceptions and half-truths. Let’s separate fact from fiction and explore what henna can really do for your hair.

Myth 1: “Henna only creates one shade of red”

The reality: Pure henna (Lawsonia inermis) does produce red-orange tones, but the final colour depends heavily on your starting hair colour and texture. On dark hair, henna creates rich auburn highlights and adds depth without dramatically changing the base colour. On lighter hair, it produces more vibrant copper and strawberry tones.

Additionally, henna is often combined with other plants to create different shades. Indigo creates brunette to black tones, while cassia adds golden highlights to blonde hair. These combinations can produce everything from rich chocolate browns to deep burgundies.

Myth 2: “You can’t use chemical dyes after henna”

The reality: This myth stems from confusion about different types of henna products. Pure, natural henna won’t react dangerously with chemical dyes, though the results may be unpredictable due to the coating henna creates on the hair shaft.

The real concern lies with “compound henna” or products labelled as “black henna” which often contain metallic salts and synthetic additives. These can indeed cause dangerous reactions with chemical processing. Always read ingredients carefully and choose 100% pure henna if you plan to use chemical treatments later.

Myth 3: “Henna damages your hair”

The reality: Pure henna actually strengthens hair by filling in the gaps in damaged cuticles and coating each strand with a protective layer. Many users report increased shine, reduced breakage, and improved texture after regular henna treatments.

However, henna can be drying if overused or if your hair is already very dry. The key is proper preparation (moisturising in the days before dyeing with henna) and not hennaing more frequently than every 4-6 weeks.

Myth 4: “The henna colour washes out quickly”

The reality: Unlike many natural dyes, henna creates a permanent colour change by bonding with the keratin in your hair. The colour may fade slightly over time due to sun exposure and washing, but it won’t wash out completely like a synthetic dye. This permanence is actually why some people struggle with henna – you’re committed to growing it out if you want to change colours dramatically (unless you want to go darker).

Myth 5: “All henna products are the same”

The reality: The quality and composition of henna products vary dramatically. Fresh, high-quality henna powder should be finely ground and green in colour (never brown or orange). It should contain only Lawsonia inermis with no additives.

Many commercial “henna” products contain synthetic dyes, metallic salts, or other plants that can cause allergic reactions or unpredictable results. Body art quality (BAQ) henna is typically the gold standard for hair use. The best quality henna comes from countries that have climates perfect for growing henna (Omani and Pakistani henna is among the best in the world, and my favourite henna to use is Jamila pure henna powder from Pakistan).

Myth 6: “Henna application is just like regular hair dye”

The reality: Henna can require more time and patience than conventional dyes to get the full saturation it can provide. The powder must be mixed well, so that it’s not lumpy (because if you have lumps left, there is dry powder left in your mix which won’t dye on contact).

Depending on the quality of your henna powder, you may need to allow it to sit after mixing for 6-12 hours before applying it to your hair. (With Jamila henna, the quality of the henna plant used to make the power is so high that I can use it straight after mixing and it will dye my hair wonderfully.)

You do not need to leave the henna in your hair for hours upon hours – again, depends on the quality of your henna powder (but if the dye molecules are poor quality, leaving them in for several hours won’t make them dye any more). I typically leave the dye in for 30 mins to an hour, before washing it out as usual.

The final henna mix should be smooth and a bit more liquid than chemical dyes. You can leave it drier if you feel it’s easier to apply that way, but water (or some lemon juice if you want to bring out the more orange tones) is the thing that will allow the powder to transfer the dye to your hair, so having a wet enough mixture ensures a better end result.

Henna is a great alternative to chemical dyes.

Just make sure you adjust your expectations. Henna is great if you have damaged hair, because it will help repair it. It’s also great for soothing an itchy scalp, and having it in is nice and cooling when the weather is hot (think mud mask but in your hair).

Before trying henna, research your supplier carefully, and only get pure henna powder to use. And yes, you can use that same henna powder to make mehndi.

When done right, henna can give you a gorgeous, healthy-looking colour that improves your hair’s condition over time. Remember: the key to henna success lies in understanding what you’re working with, not in believing the myths that surround this ancient beauty treatment.