Hair Growth Shampoo — Biotin & Rosemary
Cosmetic scalp care — not a drug treatment.
Hair Growth Shampoo — Biotin & Rosemary
30 in stock
- ✓ Full refund, any reason
- ✓ Keep the bottle — no need to ship it back
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Fuller-looking, thicker-feeling hair from a sulfate-free daily shampoo that prints every active on the label — including the lab-made one.
Five actives, named in full: PDO (Pyrrolidinyl Diaminopyrimidine Oxide), Biotin, Rosemary Oil, Saw Palmetto, and Caffeine. PDO is a lab-made cosmetic active, not a plant extract — the anchor of the scalp-conditioning system. Made for women and men with finer, thinning-looking hair; gentle enough for sensitive, color-treated scalps and everyday use. See how each active works ›
Consistency is what matters — the routine settles in over weeks 1–2, hair typically feels thicker around week 6, and by week 12 visibly fuller, thicker-looking hair is the goal. Individual results vary — this reflects what customers typically report over a consistent routine, not a promised outcome. RootStim is a cosmetic, not a drug, and makes no medical claims.
Step 2, when you want it. The shampoo is the foundation; a conditioner is an optional second step. Prefer the pair? Get the set ›
90 days. Any reason. Keep the bottle.
Money back if you're not impressed — even if the bottle is empty. One email, refunded to your original payment. No phone calls, no hoops. How the guarantee works ›
Who it's for
Who it's for
For women noticing finer strands, thinner-looking density, or a wider-looking part — especially through perimenopause and menopause, after pregnancy, or whenever age and hormones start changing the hair you've always known. If you've already tried biotin, rosemary oil, and a shelf of other shampoos and you're tired of being told it's just hormones, this is a daily scalp routine built for exactly that moment. It's for the realist who wants fuller-looking hair and a healthier-feeling scalp, not a miracle.
Thinning-looking hair builds gradually — the sooner you start a consistent scalp routine, the more there is to work with. Results build over weeks of steady use, so the best time to start supporting fuller-looking hair is now.
Why it works
Why it works
RootStim works at the scalp with a fully disclosed stack of actives — every one named on the bottle:
- Saw Palmetto — the most-studied active here, associated with a healthy-feeling scalp environment.
- PDO (Pyrrolidinyl Diaminopyrimidine Oxide) — an advanced scalp active included in the formula.
- Caffeine — a well-studied cosmetic scalp ingredient, working at the roots where clean, conditioned-looking hair starts.
- Biotin & Rosemary — classic conditioning and scalp-support ingredients.
- Sulfate-free — gentle enough for sensitive scalps and daily use.
What to expect, honestly: used consistently, the routine settles in over weeks 1–2; hair typically feels thicker around week 6; and by week 12, visibly fuller, thicker-looking hair is the goal. Consistency is what matters — no overnight results. Individual results vary — this reflects what customers typically report over a consistent routine, not a promised outcome. RootStim is a cosmetic, not a drug, and makes no medical claims.
How to use
How to use
1. Massage into a wet scalp and work into a lather.
2. Leave on for 2–3 minutes so the actives can work, then rinse thoroughly.
3. Follow with a conditioner, especially on dry or color-treated hair.
Use as your regular shampoo with consistent, ongoing use. A little goes a long way. We recommend a patch test before first full use.
Ingredients
Ingredients
Key actives & ingredients:
- Biotin
- Rosemary
- Saw Palmetto (Serenoa repens)
- He Shou Wu (Polygonum multiflorum)
- PDO (Pyrrolidinyl Diaminopyrimidine Oxide)
- Caffeine
- Niacinamide
- Panthenol
- Argan
- Aloe
- Tea Tree
Sulfate-free · paraben-, phthalate- & dye-free · Ginger-herbal scent. Pet safety: contains active ingredients that can be harmful to pets, especially cats — keep away from pets and wash hands after use.
Our 90-Day Money-Back Guarantee
Our 90-Day Money-Back Guarantee
Try RootStim risk-free with our 90-Day Money-Back Guarantee. If you don't see results you love, reach out within 90 days for a full refund — and keep the bottle. We're confident because consistency is what delivers results, and we want you to give it a fair try. Free U.S. shipping on orders over $40.
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Common Questions
Is RootStim a hair loss treatment?
Is RootStim a hair loss treatment?
No. RootStim is cosmetic scalp care — not a drug treatment. It's a daily shampoo-and-conditioner routine that cleanses the scalp, conditions the hair, and supports the look of fuller, thicker-looking hair.
It isn't a medicine, and nothing on this site is medical advice. If your shedding is sudden, patchy, or comes with an irritated scalp, please see a doctor — that's a conversation for a professional, not a shampoo bottle.
When should I expect results?
When should I expect results?
Hair works on its own schedule, so here's our honest timeline.
Weeks 1–2: the routine settles in — your scalp feels cleaner and lighter, buildup rinses away, and hair feels softer to the touch.
Around week 6: hair typically feels thicker and easier to style, and many notice it starting to look fuller at the roots.
By week 12: visibly fuller, thicker-looking hair is the goal.
Individual results vary. This reflects what customers typically report over a consistent routine — not a promised outcome. We ask you to judge at 90 days on purpose: that's how the guarantee is built.
Does it contain minoxidil?
Does it contain minoxidil?
No. This is a cosmetic hair-and-scalp routine — no minoxidil, and no drug actives of any kind. Every active in the formula is named in full on the label and explained on our Science page. No secret blends.
What if it doesn't work for me?
What if it doesn't work for me?
Then you get your money back. If you're not impressed after your 90-day routine, email cs@rootstim.com with your order number any time within 90 days of delivery, and we'll refund the full amount to your original payment method — even if the bottle is empty.
No photos. No phone calls. No hoops. Keep the bottle. Full details are on our Guarantee page.
How long does shipping take?
How long does shipping take?
Shipping typically takes 3-6 business days within the United States (1-2 days processing). You will receive a tracking number once your order has shipped so you can monitor its progress.
Does my order come in protective packaging?
Does my order come in protective packaging?
Every order is packed with care: each product is securely wrapped and cushioned so it arrives in perfect condition.
Do you ship internationally?
Do you ship internationally?
Currently we ship within the United States only.
What payment methods do you accept?
What payment methods do you accept?
We accept a variety of payment methods to make your shopping experience convenient. These include credit cards (Visa, Mastercard, American Express), PayPal, and, in some regions, alternative payment methods such as Apple Pay or Google Pay. Rest assured, your payment information is secure and protected during the checkout process.
