Are "PPD-Free" Hair Colour Claims Real? The ASA Ruling and the Chemistry Behind It

PTD, the ingredient most "PPD-free" hair colours use instead of PPD, is chemically PPD plus one methyl group — and in February 2025 the Advertising Standards Authority upheld a complaint against a "PPD-free" claim for exactly that reason. Someone allergic to PPD can still react to PTD; the published cross-reaction rate in real patients runs from roughly half to nearly all of them, depending on the study. Here's the ruling itself, the chemistry behind it, what the newer "ME+" alternative actually proves, and a straight answer — not a guess either way — on what's actually in Life Color Plus.

The Ruling: What the ASA Actually Found

On 12 February 2025, the Advertising Standards Authority upheld a complaint against Instituto Naturvita S.L., trading as Natur Vital, over its "Coloursafe" hair colourant range. The complaint came from the Cosmetic, Toiletry and Perfumery Association (CTPA) — the UK cosmetics industry's own trade body, not a rival brand or a consumer group.

Natur Vital's website had said: "PPD FREE PERMANENT HAIR DYE WITH HIGH SKIN TOLERANCE … lessening the risks of allergic reactions and skin irritations … Para-phenylenediamine (PPD) is responsible for most allergic reactions following the use of hair dyes … The absence of PPD in the formula could minimize the risk of allergic reaction." That's the advertiser's own copy, quoted in the ruling — not the ASA's own finding.

The ASA's assessment: the products were genuinely free of PPD. But they contained a different chemical — toluene-2,5-diamine sulfate, also called paratoluene diamine sulfate and abbreviated PTD — and the wording and repetition of the "PPD-free" claims, reinforced by the product name "ColourSafe," would lead consumers to believe there was very little risk of an allergic reaction in people already allergic to PPD, "when that was not the case." Because allergic reactions are a serious medical condition, the ASA ruled that implication irresponsible, not just inaccurate.

The advertiser's own site carried a mitigating disclosure — a linked page stating that 50% of people allergic to PPD would also react to Coloursafe, the other 50% would not, and recommending a 48-hour patch test. The ASA rejected it: the disclosure was "not presented sufficiently clearly nor prominently to counteract the impression" created by the main marketing claims. The ad breached CAP Code rules on social responsibility (1.3), misleading advertising (3.1, 3.3) and qualification (3.9, 3.10), and the ASA ordered it must not appear again in that form.

Is PTD Really Similar Enough to PPD to Matter?

Yes. The EU's Scientific Committee on Consumer Safety, in its official opinion on toluene-2,5-diamine, lists one of its recognised chemical names as "2-Methyl-p-phenylenediamine sulfate." PTD is PPD with one extra methyl group on the ring — not a loose comparison, but the compound's own scientific nomenclature.

UK and EU cosmetics law reflects the same relationship in practice: the mandatory warning text differs for the two families. A PPD-only product must carry "Contains phenylenediamines." A PTD/toluenediamine product must carry "Contains phenylenediamines (toluenediamines)" — the word "phenylenediamines" appears on both, by design.

The cross-reactivity has been tested directly, not just inferred from the name. In a guinea-pig study reviewed by the SCCS, 100% of animals sensitised to PPD reacted when challenged with PTD, while animals sensitised to two less closely related amines did not — a cross-reactivity signal specific to the PPD–PTD pair. In humans, a study of over 8,000 patch-tested patients found 231 sensitised to PPD and 109 to PTD, with cross-reactivity "commonly found" between the two, tracking the strength of the original patch-test reaction. A separate analysis found patients reacting to PTD were also positive for PPD in 5 out of every 6 cases. The mechanism is understood, not just correlated: a study of human T-cells from PPD-allergic patients found broad cross-reactivity (64.7%) with PTD and two related compounds — the immune system's receptors are recognising similar molecular shapes across the group, "with low specificity," exactly what two molecules differing by one methyl group would produce.

This is common cross-reactivity, not universal — not every PPD-allergic person will react to PTD. But neither the SCCS's own animal data nor the human patch-test literature supports treating a PTD-based product as safe for someone with a known PPD allergy.

What About ME+ / ME-PPD — Does the "Reduced Risk" Claim Hold Up?

Partly. ME-PPD (marketed by some brands as "ME+") is a further chemical modification — a methoxymethyl side chain in place of a simple methyl group. The foundational data behind the "reduced risk" claim comes from the ingredient's own manufacturer: a laboratory potency test found ME-PPD needed a much higher concentration to trigger a reaction in animals than PPD or PTD did, and a follow-up risk model built on that same figure concluded the risk to consumers, and separately to hairdressers handling it daily, was far lower than for PPD or PTD. Both studies were authored by the ingredient's manufacturer (Procter & Gamble, later Wella) or its funded academic partners — real, peer-reviewed science, but not independent of the company that owns the ingredient.

The clinical trials that test cross-reactivity in real PPD-allergic people are independently peer-reviewed, though every one discloses manufacturer funding in its own conflict-of-interest statement. Their results agree on one point: reduced, not eliminated. In one head-to-head trial, 84% of PPD-allergic subjects reacted to a PPD-containing dye, and 48% still cross-reacted to the same dye made with ME-PPD. In a separate trial, that figure was 30%. In a smaller Italian cohort of highly PPD-allergic volunteers, it was 88% — though their reaction to ME-PPD was significantly weaker than to PPD. Across the published research, the cross-reaction rate for ME-PPD in people already allergic to PPD runs from roughly 30% to nearly 90%, depending on the study and the method. That's a real reduction on average — and not a route back to permanent colour for anyone with a genuine PPD allergy.

A real-world tolerance study found a negative 45-minute pretest with an ME-PPD product did not reliably predict safety: of the people who passed it, roughly a quarter still had a mild-to-moderate allergic reaction the first time they actually had their hair coloured with it. A 2016 editorial comment, written independently of the manufacturer-funded research group, responded to that study under the title "Advice for patients with hair dye allergy remains 'stop using permanent hair dyes'" — a fair one-line summary of the caution the evidence supports.

Does Life Color Plus Contain PPD?

The straight answer: it isn't published anywhere, at the level of an individual shade.

The live UK ingredient list on lifecolorplus.co.uk is genuine, but cuts off mid-word before the list is complete — every ingredient visible in it is a carrier or conditioning ingredient (water, thickeners, a chelator, a fragrance component), with no dye precursor of any kind in the text that's actually there, because the text stops before that section would be reached. FarmaVita's own technical brochure for the range confirms it as an ammonia-based product with a proprietary, chemically unnamed odour-neutralising ingredient, but carries no ingredient list, INCI names or safety declaration at all. Neither the current shade chart, FarmaVita's US distributor's own product listings (checked across all fifteen), nor the lifecolorplus.co.uk sitemap (exactly five static pages, none of them ingredients or safety data) carries a full ingredient declaration either.

The one genuine piece of evidence is an older, official FarmaVita shade chart (print-proof dated 2015) carrying a Nordic-language regulatory warning that translates to "Ammonia, benzenediamines, resorcinol and toluenediamines." That's a real, manufacturer-published warning — printed once, generically, for the whole range, not broken out by shade. And because a PTD-only warning also has to say "phenylenediamines" (see above), that single warning can't tell you whether a given tube contains PPD, PTD, both, or — for a toner or corrector with no oxidative precursor at all — neither.

Life Color Plus is not marketed as "PPD-free," and its official chart carries the standard phenylenediamines/toluenediamines warning that applies to oxidative permanent colour lines generally. Which specific precursor sits in which specific tube isn't published anywhere the brand has made available.

What a Patch Test Actually Establishes

The Natur Vital ruling and the wider evidence above point at the same limit of a patch test (testing obligations themselves are a matter for the regulation and your own insurer's requirements, not something this article covers). A patch test tells you about a reaction to the specific substance tested, at the concentration and exposure time tested. It doesn't establish that a PPD-allergic client is safe with a PTD or ME-PPD product just because that product wasn't the one tested — and, per the tolerance study above, it doesn't guarantee safety on repeated real-world use even for the exact product that was tested and passed.

Summary: PPD, PTD and ME-PPD at a Glance

"PPD-free" is a real, checkable claim with a real ruling behind it — and the chemistry it's built on is genuine cross-reactivity, not a technicality. It's neither "PPD-free products are just as risky as PPD" nor "the reduced-risk alternatives are proven safe": PTD cross-reacts commonly, ME-PPD cross-reacts less often but not never, and Life Color Plus's own published material doesn't say which of these is in any specific tube.

Part of a short series untangling the developer and colour-chemistry questions we get asked most.
See also: 1.9% Developer Explained: Why Demi-Permanent Activators Run So Weak · Can You Mix Developers Across Brands? · Mixing Permanent and Demi Colour in the Same Bowl · Colour Remover vs Bleach Bath: What's the Difference?
For what's actually in the tube more broadly, see What's Actually in Life Color Plus. If a previous colour has gone wrong and an allergy history is part of the picture, see Correcting a Colour That Has Gone Wrong.

Sourced to: the ASA's own published ruling on Instituto Naturvita S.L. t/a Natur Vital (Complaint Ref A24-1257402, 12 Feb 2025, asa.org.uk); the EU Scientific Committee on Consumer Safety's opinions on toluene-2,5-diamine (SCCS/1390/10) and p-phenylenediamine (SCCS/1443/11); UK retained Regulation 1223/2009, Annex III; Skazik et al. (2008, Contact Dermatitis), Vogel et al. (2017, Contact Dermatitis), Basketter & English (2009, Cutaneous and Ocular Toxicology) and Thomas et al. (2014, Contact Dermatitis) on PPD/PTD cross-reactivity; Goebel et al. (2014, Toxicology and Applied Pharmacology) and Gargano et al. (2022, Dermatitis) on ME-PPD potency and occupational risk (manufacturer-authored); Schuttelaar et al. (2018), Blömeke et al. (2015), Kock et al. (2016) and Tammaro et al. (2019, all Contact Dermatitis/British Journal of Dermatology/European Annals of Allergy and Clinical Immunology) on ME-PPD cross-elicitation and tolerance; and CTPA's own published guidance and press statements. Life Color Plus's own product page, technical brochure, shade chart and sitemap were checked directly for the ingredient fact-check above.