Nutrafol Shampoo and Conditioner: What the Root Purifier Claims, Read Closely
Nutrafol's $44 shampoo and conditioner are gentle cosmetics with company scalp tests behind them, not hair-loss treatments.
Nutrafol's Root Purifier Shampoo and Strand Defender Conditioner are sulfate-free cosmetics that cost $44 a bottle each on 18 October 2026. The company's published testing shows the shampoo reduced scalp oil and flaking over the study period, and that the conditioner made bleached hair samples easier to comb in a laboratory. None of that testing measured hair loss or hair growth, there was no comparison group in the scalp study, and the authors worked for or with the company. As shampoos they may be pleasant. As hair-loss products, the cheaper medicated shampoos with actual trials are the better-evidenced choice.
This entry is information only, drawn from Nutrafol's product pages, a 2023 company paper and PubMed as they stood on 18 October 2026. No clinician has checked it. Nobody here has used the products. If your scalp is itchy, scaly or painful, or your hair is coming out in patches, see a doctor first.
The short verdict
The direct answer: buy them if you like them as shampoo and conditioner; do not buy them to slow hair loss.
- What they are: a cleansing shampoo with prebiotics, vegan protein and a "bio-based cleanser", and a conditioner built on ximenia oil, sold for women; plus a 2-in-1 for men.
- What the company tested: oil, hydration, flaking and pH on the scalp, and combing force on hair samples.
- What nobody tested, as far as we could find: whether either product changes shedding or hair counts.
- Cheaper with more evidence: generic ketoconazole or zinc pyrithione shampoos, if dandruff or flaking is part of the picture.
What's in the shampoo and conditioner
The direct answer: gentle cleansers and conditioning agents, without the ingredients that hair-loss shoppers are often told to avoid.
The women's Root Purifier Shampoo page describes "prebiotics, vegan protein, and a bio-based cleanser that deeply cleanse thinning hair without stripping the scalp", and says the formula leaves out parabens, phthalates, silicones, sulfates and synthetic fragrance. Its claimed benefits are balancing oil without stripping, hydrating the scalp, and visibly improving volume, strength and texture "in 2 weeks". It calls itself colour and extension safe and gentle enough for daily use.
A 2023 paper by Nutrafol staff describes the shampoo's ingredient approach in more detail: a yeast-fermented, lipid-based biosurfactant, Australian wild berries as antioxidants, vegan proteins and a prebiotic called alpha-glucan oligosaccharide. The same paper describes the Strand Defender Conditioner as combining fermented amino acids and arginine, ximenia oil, glucose fibres, sea buckthorn and wheat proteins.
The conditioner page makes a claim worth quoting because it is unusually candid: "Your hair cannot be repaired once it leaves the scalp. Hair is not alive." That is accurate, and it is also the reason no conditioner can do anything about hair loss, which happens at the follicle.
The men's product is a 2-in-1 shampoo and conditioner, also $44, which the page says is the first 2-in-1 certified microbiome-friendly by a private certification scheme.
The "100%" claim and "data on file": what a consumer-perception study is
The direct answer: these figures are what participants said they noticed, not measurements of hair.
The men's 2-in-1 page footnotes its claims about dissolving build-up and improving a dry, flaky scalp to "Nutrafol. Data on file. 2024", which is not published. In the company's 2023 paper, 100% of people using the Root Purifier Shampoo self-reported an improvement in dry, flaky scalp.
Figures like these come from questionnaires. Someone who has chosen to take part in a product study, and uses a new shampoo for a few weeks, is asked whether they agree that their scalp feels less flaky. Without a group using an ordinary shampoo for comparison, these studies cannot separate the product from the simple effect of washing regularly with something gentle, or from people's expectations. They are useful for knowing whether customers like a product. They are not evidence about hair loss, and the products do not claim that they are.
The women's shampoo page also footnotes a 2022 paper by Stephens and colleagues in the Journal of Clinical and Aesthetic Dermatology. On PubMed that paper is a six-month study of a nutraceutical supplement in men and women, not a test of a shampoo; the page does not make clear which shampoo claim it is meant to support.
What the company's scalp test measured
The direct answer: in 37 people, oil went down, hydration went up and flaking improved over the study, compared with their own starting point.
Townsend and colleagues, writing in a 2023 supplement of the Journal of Clinical and Aesthetic Dermatology with authors from Nutraceutical Wellness, the company behind Nutrafol, reported that 37 people with oily, dry or self-perceived sensitive scalps used Root Purifier at home at least three times a week. Sebum fell and hydration rose significantly, flakiness improved when scored by an expert grader, and scalp pH stayed in range. The figure legend compares results with baseline: there was no control shampoo.
For the conditioner, the paper describes a laboratory test on bleached hair tresses combed by a machine: Strand Defender reduced the force needed to comb and the number of broken fibres over 2,000 strokes, compared with a non-conditioning solution. That is a sensible test of a conditioner, done on cut hair rather than on a person.
| Product | Test | Who or what was tested | Comparison | What was measured |
|---|---|---|---|---|
| Root Purifier Shampoo | Home use study | 37 people with oily, dry or sensitive scalps | Their own baseline | Sebum, hydration, flaking, pH, self-reported scalp improvement |
| Strand Defender Conditioner | Laboratory combing test | Bleached hair tresses | Non-conditioning surfactant | Combing force and broken fibres over 2,000 strokes |
| Men's 2-in-1 | Data on file, 2024 | Not stated on the page | Not stated | Not stated on the page |
Why a wash-off product has limits
The direct answer: whatever is in a shampoo is on the scalp for a minute or two before it goes down the drain.
That short contact time is why even medicated shampoos are tested carefully for whether their active ingredient does anything to hair, and why the US rules treat hair-growth claims as drug claims. FDA guidance dated 11 September 2024 names a promise to "restore hair growth" as the kind of wording that turns a cosmetic into a drug. Nutrafol's shampoo pages keep to cosmetic claims: oil, hydration, volume, texture. Read them that way.
Against shampoos that have trials
The direct answer: if your scalp is flaky or itchy, the medicated shampoos have more evidence and cost less.
The FDA's over-the-counter rules for dandruff, at 21 CFR 358.710, permit pyrithione zinc, selenium sulfide, salicylic acid, coal tar and sulfur at set strengths, and ketoconazole 1% is sold without a prescription under its own approval. These are drugs with labels and warnings, aimed at dandruff and seborrhoeic dermatitis, and two of them have been studied for hair as well:
- Pyrithione zinc: a 2003 randomised trial in 200 men compared a 1% pyrithione zinc shampoo with placebo shampoo, minoxidil and both, over six months, and counted hairs.
- Ketoconazole: a small 1998 comparison reported hair density and size improving on 2% ketoconazole shampoo much as on minoxidil, and a 2025 Canadian expert panel put ketoconazole shampoo among treatments "recommended with near consensus" for pattern hair loss. The prescription 2% label also reports that, among 264 patients in eleven double-blind trials for dandruff or seborrhoeic dermatitis, under 1% had either extra shedding or irritation.
Neither reliably treats pattern hair loss, and the evidence is small. It is still more than we could find for any premium hair-loss shampoo, including this one.
Price, dated
The direct answer: $44 a bottle, $88 for the pair, as listed on 18 October 2026.
| Product | Listed price | What you get |
|---|---|---|
| Root Purifier Shampoo | $44 | One bottle, delivered once |
| Strand Defender Conditioner | $44 | One bottle, delivered once |
| Shampoo and conditioner together | $88 | One bottle of each |
| Men's 2-in-1 Shampoo and Conditioner | $44 | One bottle |
The product pages did not state bottle size in the text we read. Prices move, so read these as one day's listing rather than a quote. Generic medicated dandruff shampoos are sold widely; we did not price one at source that day, so no generic figure appears here.
Who it suits
The direct answer: someone who wants a sulfate-free cleanser and conditioner and is happy to pay for the experience.
It may suit someone already treating diagnosed hair loss who wants gentle products that will not irritate the scalp, or someone who prefers formulas without sulfates and synthetic fragrance. It is not a substitute for a diagnosis, and it is not a reason to delay a blood test. If you want to buy it, our Nutrafol link is an affiliate link, and a first order through it can pay us a commission; nothing written here depends on that. If you are weighing the capsules too, start with our full Nutrafol review, and for what drives hair loss before any product, see our entry on iron, ferritin and vitamin D testing.
Edge cases
You have dandruff or seborrhoeic dermatitis. Use a medicated shampoo; Root Purifier is not labelled as a dandruff treatment.
You take Nutrafol capsules already. The shampoo is sold as a companion. Nothing we found shows the pair works better than the capsules with an ordinary shampoo.
You have a scalp allergy. Botanical extracts can irritate. Patch-test, and stop if redness or itching starts.
You colour or extend your hair. The page says the products are colour and extension safe; that is a cosmetic claim worth taking at face value, and it is about the hair, not the follicle.