Is Ammonia-Free Hair Color Less Damaging in 2026?

Ammonia-free hair colour can be a great option for achieving beautifully rich and lasting colour – but ammonia-free doesn't automatically mean damage-free. Like any hair colour, its impact on your hair depends on the entire formulation and how it's used. Plus, as Wella Professionals scientists discovered, how your hair colour manages metals is also key to maintaining condition.

Why metals, you might wonder? Because the most common ammonia alternative, MEA, has been found to create an environment where metals present in your hair (specifically copper and iron) become highly reactive during the colouring process, potentially contributing to damage. But don’t let that put you off. 2026 has seen the launch of a new ammonia-free hair colour specifically designed to address this surprising reaction. Keep reading to learn more about ammonia-free hair colour, damage control, and Pure Perfection's Supercharged Metal Purifier...

What Does Ammonia-Free Hair Colour Actually Mean?

Ammonia-free means a hair colour is formulated without ammonia. But, despite some confusion, it doesn’t automatically mean chemical-free or damage-free. Before we get into why, it’s important to know that there are two types of ammonia-free hair colours:

• Non-oxidative hair colours, like temporary or semi-permanent dyes, are ammonia-free because they simply don’t need an alkalizer like ammonia to do their job. They’re designed to colour the surface of hair without significantly altering its internal structure.

• Oxidative hair colours, like demi-permanent or permanent hair dyes, need to penetrate the hair cuticle in order for the colour to develop, usually with the help of ammonia and its alkalizing powers. Ammonia-free colours use alternative ingredients to recreate the same alkalizing effect, so the colour is still able to penetrate the hair.

Usually, when people talk about ammonia-free hair colours, they're referring to oxidative formulations; demi-permanent and permanent colours that might usually benefit from ammonia, but have been formulated with an alternative ingredient. The most popular is MEA (monoethanolamine), which – like ammonia – raises the pH level of the hair to swell the cuticle, so colour molecules can rush inside and deliver your dream shade.

Is Ammonia-Free Hair Colour Better for Damaged Hair?

Ammonia-free hair colour isn't automatically less damaging – but that doesn't mean it's a damaging choice. The overall formulation matters, particularly when it comes to managing metals naturally present in the hair.

Most of us have a build-up of metals in our hair that come from the water we wash with, and Wella Professionals scientists discovered that MEA – the popular ammonia alternative – can make these metals highly reactive during the permanent hair colouring process.

As a result, damage can occur during colouring, making metal-controlling technology crucial in ammonia-free hair colour. That's why all Wella Professionals ammonia-free colours contain Metal Purifier. And because highly reactive metals are of particular concern in permanent hair colour, our first permanent ammonia-free colour, Pure Perfection, features our Supercharged Metal Purifier.

This exclusive technology neutralizes iron and copper particles that can become highly reactive during the colouring process, helping to protect the hair from metal-induced damage.

”Pure Perfection is truly unique! Colour results are pure, weightless and natural.”

– Briana Cisneros (@brianacisneros), Wella Professionals Global Ambassador

Ammonia-Free Colours Compared: Demi-Permanent vs. Permanent

As we mentioned above, 'ammonia-free hair colour' usually refers to demi-permanent or permanent formulas that use ammonia alternatives – not semi-permanent or temporary colours, which simply do not need the effects of ammonia. But which is less damaging: demi-permanent or permanent colour?

• If you want a less intensive colour process: choose a demi-permanent colour, like Color Touch. Ammonia-free demi-permanent colours generally cause less structural change to your hair.
• If you want longer-lasting colour, stronger grey coverage or lightening: choose a permanent colour, like Pure Perfection. Ammonia-free permanent colour uses a more intensive process to deliver these results, so it has greater potential to affect your hair's structure.

Ammonia-Free Hair Colour Options for Grey Coverage

It's time we debunked a myth. Despite popular belief, ammonia-free products can help you cover up grey hair, with different products offering different levels of coverage. Demi-permanent colours are ideal for softer grey blending, with Color Touch providing up to 50% grey coverage. Meanwhile, certain permanent colours, like Pure Perfection, offer up to 100% grey coverage. So, don't let misinformation and a few silver strays steer you away from ammonia-free hair colours; just like ammonia-based colours, the right formula can effectively target every last grey.

Ammonia-Free Hair Colour: FAQs

Do Professional Hair Colourists Use Ammonia-Free Hair Colour?

Yes, professional hair colourists will use both ammonia-free and ammonia-based hair colours, depending on what they believe is best suited to your hair type, condition and desired result. Wella Professionals’ ammonia-free hair colours, Color Touch and Pure Perfection, are both salon products, used to achieve the rich, radiant results you want without ammonia in the formulation.

Can Ammonia-Free Hair Colour Still Irritate a Sensitive Scalp?

Although some people find ammonia-free hair colour more comfortable or gentler on the scalp than ammonia-based formulas, it can still cause irritation or an allergic reaction. If you’re trying a new hair colour product, your colourist may recommend a patch test and/or strand test beforehand to help assess its suitability.

What Ingredient Should You Look for Instead of Ammonia in Hair Colour?

If you’re looking for an ammonia-free hair colour, one of the most common ammonia alternatives to look for is MEA. This alkaline ingredient helps to create the right conditions for hair colour to develop without ammonia. However, ammonia-free doesn’t necessarily mean irritation-free. If you have a sensitive scalp, you may also want to look for a colour that’s PPD-free, as PPD can cause allergic reactions in some people.

Does Ammonia-Free Permanent Hair Colour Last As Long As Regular Colour?

Yes, ammonia-free permanent hair colours can offer similarly long-lasting results ammonia-based permanent colours. How the colour wears depends on the full formula and how you care for your shade at home – not just on the presence of ammonia.

Find the Right Ammonia-Free Hair Colour for You

So, is ammonia-free hair colour less damaging? There is no 'one size fits all' answer; it depends on a range of factors, from supporting ingredients to how your colour is used. To understand if ammonia-free colour is right for you, speak to your colourist at your nearest Wella salon. They'll help you find the formula that considers all factors: your hair history, lifestyle, hair porosity, type, texture, condition and goals.