For hair that changes with hormones and age
A cause isn’t a routine. This is.
- For women noticing thinning-looking hair and a widening part.
- Five actives, every one named in full on the label: PDO, biotin, rosemary oil, saw palmetto, caffeine — including the one made in a lab.
- 90 days. Any reason. Keep the bottle.
More strands in the brush. On the pillow. Around the shower drain.
A ponytail that feels thinner than it used to. A part that looks a little wider in photos.
“I don’t expect to reverse the loss but no longer finding hair in my shower drain is a win.”— Verified Buyer
If that list feels familiar — this page was written for you.
“It’s just hormones.”
“It’s just stress.”
“It’s just age.”
We get it. If your hair has been thinning, you’ve already heard every answer there is.
Maybe. But an answer isn’t a plan — and knowing why isn’t a routine.
Hair that changes with hormones and age usually isn’t one dramatic event. It’s a scalp environment that slowly stops supporting the hair you have. So RootStim starts where hair starts: it cleanses and conditions the scalp, strengthens hair at the root, and reduces breakage from the very first washes.
It’s not your hair. It’s what’s been washing it.
Pick up the shampoo you already own — especially if it’s marketed for thinning hair. Turn it around. Read the second ingredient out loud.
If it ends in “sulfate,” here’s what’s worth knowing: your hair is a protein, held together by sulfur bonds. Harsh sulfate surfactants are very good at stripping oils and proteins — that’s their job. It’s why the same class of chemical shows up in dish soap and degreasers.
A shampoo isn’t doing thinning hair any favors while it keeps stripping what hair is built from.
You didn’t do anything wrong. It was never about trying harder — it was about what your routine was washing away.
We built RootStim around that one idea: cleanse without stripping, then feed the scalp. The same five minutes you already spend in the shower. Nothing new to remember.
PDO (Pyrrolidinyl Diaminopyrimidine Oxide)
The lab-made active, included for root-level scalp care — and printed on the label in full.
Biotin
A building-block nutrient that helps strengthen and condition the hair you have.
Rosemary Oil
The most-studied botanical here, associated with a healthy-feeling scalp environment.
Saw Palmetto
The classic botanical for a refreshed, balanced-feeling scalp.
Caffeine
A well-studied cosmetic scalp-care ingredient that works at the roots.
No “proprietary blend.” No percentage we wouldn’t stand behind.
So — tonight. Turn your bottle around. Read the second ingredient. If you don’t love what you find, ours is here, and the whole pitch is printed on it.
Cosmetic scalp care — not a drug treatment.
*All orders, past 12 months — counted from our own records.
What to expect, week by week
DIRECTIONS: Thoroughly wet your hair. Pour a coin-sized amount of shampoo into your palm. Apply the shampoo from roots to tips. Lather and gently massage your scalp with your fingertips for 2-3 minutes. Rinse with warm water until clean.
“We keep it on for 4-5 minutes and use a shower scalp brush to massage to really work the scalp.”— Laura · Verified Buyer
The first wash is just that — a gentle, sulfate-free wash.
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Weeks 1–2
The routine settles in. Your scalp feels cleaner and lighter; buildup rinses away; hair feels softer to the touch.
What to check: how your scalp feels right after the wash.
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Around week 6
Hair typically feels thicker and easier to style — and many notice it starting to look fuller at the roots. Your brush and drain are your own data.
What to check: the drain catcher.
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By week 12
Visibly fuller, thicker-looking hair is the goal. Not impressed? Keep the bottle — money back.
What to check: your part line in the mirror — and how the ponytail feels in your hand.
It varies — which is exactly why the guarantee runs 90 days.
You won’t need our word for it — your brush will tell you.
Individual results vary. This timeline reflects typical customer-reported perception over a consistent routine — not a promised outcome. That’s why the guarantee covers the full 90 days.
Real People, Real Results
The reviews that mean the most to us all start the same way: with somebody who didn’t believe us.
So we won’t ask you to believe anything. We’ll ask you to read.
ROOTSTIM REPLIED — “We’d rather earn that fifth star than promise it.”
These creators received RootStim products at no cost. Opinions are their own. Clips are excerpts from their original videos, edited for length and used with permission.
That’s the kind of win we’re offering. Not a miracle. A plan.
More than 97 in 100 never ask for a refund.* *All orders, past 12 months — counted from our own records.
Individual results may vary.
Choose your pack
Free U.S. shipping over $40 — every pack here qualifies. Arrives in 3–6 business days. One-time purchase, no subscription.
Get My 3-Bottle Pack Get My 2-Bottle Pack
90 days. Any reason. Keep the bottle.
A shampoo takes weeks to judge honestly — so the guarantee covers the full 90 days. If you’re not impressed, email cs@rootstim.com with your order number: full refund to your original payment, nothing to box up, nothing to prove.
Because skepticism deserves better than promises.
The policy fits in one sentence because we mean it.
Join the thousands of women who’ve switched their shampoo first.
Five actives, named in full: PDO, biotin, rosemary oil, saw palmetto and caffeine.
RootStim began with a simple conviction: nature and science belong in the same bottle. We chose our actives deliberately — rosemary, caffeine, saw palmetto: some backed by modern study, some trusted for centuries — plus one made in a lab, because it earned its place. Every ingredient is named in full on the label; nothing hides in a “proprietary blend.” Your scalp is the soil healthy hair depends on. And because a shampoo takes weeks to judge honestly, the 90 days are on us — any reason, keep the bottle.
— RootStim
If your hair concerns feel bigger than a shampoo, that’s a conversation for your doctor — this routine works alongside whatever you choose.
Your questions, answered honestly
Is RootStim a hair loss treatment?
No. RootStim is cosmetic scalp care, not a drug treatment. It cleanses, conditions and strengthens the hair you have. If you’re exploring medical options, that’s a conversation for your doctor — and this shampoo will still be a good scalp routine alongside whatever you choose.
How long before I notice anything?
Most women feel the difference in the wash within the first two weeks, and typically notice thicker-feeling hair around week six. It varies — which is exactly why the guarantee runs 90 days.
What’s actually in it?
Five actives, named in full: PDO, biotin, rosemary oil, saw palmetto and caffeine. Sulfate-free, no parabens, no phthalates. The complete ingredient list is printed on every bottle.
Shipping and returns?
Free U.S. shipping on orders over $40 — every pack on this page qualifies. Ships from U.S. warehouses: 1–2 days to pack, then 3–6 business days in transit. And the 90-day guarantee means returns are one email, with nothing to ship back.
What happens if I stop using it?
RootStim is cosmetic scalp care, not a drug treatment. Like any cosmetic routine, it cares for your hair and scalp while it’s part of your washes — we don’t make claims about what stays after you stop. If you take a break, you can simply pick the routine back up.
Is it safe for color-treated hair?
RootStim is a gentle, sulfate-free wash — no parabens, no phthalates. Sulfate-free cleansing is the usual recommendation for color-treated hair. If your hair is freshly colored, bleached or permed, follow your stylist’s advice on timing.
Can men use it?
Yes. Nothing in the formula is women-only — same five actives, any scalp. You’ll spot a man or two in the reviews above.
Will it leave my hair dry or greasy?
We built RootStim around that one idea: cleanse without stripping, then feed the scalp. What you can expect is only what we’re willing to print: a gentle, sulfate-free wash. Less breakage. Hair that feels stronger and looks fuller over weeks of use. It’s a rinse-out shampoo, not a leave-in — nothing stays behind to weigh hair down. And if it’s not for you, that’s covered: 90 days, any reason, one email, full refund — the bottle stays with you.
Is RootStim safe around pets?
RootStim is a cosmetic product formulated and tested for human use only — we can’t make safety claims for cats, dogs, or other animals. Some ingredients common in hair care, including essential oils like rosemary, are known to be a concern for pets (especially cats). Please store bottles out of reach, rinse thoroughly, and never use the product on animals. If your pet licks or ingests it, contact your veterinarian.
My scalp is sensitive — will it irritate?
Sensitive scalps deserve specifics, not adjectives — so we won’t promise “safe for everyone.” The complete ingredient list is printed on every bottle. Read it first, the way you would with anything new for your skin; if your scalp is ever uncomfortable, stop using it. Either way you’re covered: 90 days, any reason, one email, full refund — the bottle stays with you.
What if it doesn’t seem to be working for me?
Then the guarantee is doing its job. Judge it against the week-by-week timeline above, on your own brush and drain — it varies, which is exactly why the guarantee runs 90 days. And if you’re not impressed: any reason, no argument, and the bottle stays with you. One email, full refund.
What does it smell like?
Fresh and clean — a mint-and-ginger character, not an herbal rosemary scent. It rinses out completely and doesn’t linger on your hair.
Fuller-looking hair, honestly.
Three bottles. 75+ washes. Under $1 a wash — and 90 days to change your mind.
An answer isn’t a plan. This is.
Individual results may vary. Cosmetic scalp care — not a drug treatment.
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