4.9 average across 580+ verified reviews
The hair aisle stopped talking to you.
We didn't. Honest hair care for hair that changes with hormones and age — every active printed on the label. Try it for 90 days, money back if you're not impressed.
Why one more bottle rarely changes anything
Rosemary oils. Expensive supplements. Miracle-in-a-bottle serums. If the results never matched the promises, the gap usually isn't effort — it's the approach. Most options are a single step with a big claim and no clear explanation of how they're meant to help.
RootStim is built the other way around — as a scalp-care system, not a one-bottle shortcut. Fuller-looking, thicker-looking hair starts with a clean, balanced scalp, so the routine works scalp-to-strand: cleanse, condition, and nourish with five salon-grade actives, named in full — PDO, biotin, rosemary oil, saw palmetto, and caffeine. Every active is right there on the label, explained in plain English — no mystery blend, no guesswork.
Choose Your 90-Day Routine
Type:
Hair Growth Shampoo — Biotin & Rosemary
Type:
Big-Bottle Routine Set — Hair Growth Shampoo + Conditioner (500 mL)
Prefer bigger bottles? A 500 mL shampoo and conditioner pair — the optional second step, 40+ washes per bottle, for fuller-looking hair.
Type:
Hair Growth Shampoo & Conditioner Set
Daily shampoo and conditioner that leave hair looking fuller, softer, and cleaner.
Science, in plain English
Hair typically feels thicker around week 6; visibly fuller, thicker-looking hair by week 12 of consistent use. Individual results may vary.
PDO
Pyrrolidinyl Diaminopyrimidine Oxide — a lab-made cosmetic active, not a plant extract. It anchors the stack, and we print it on the label in full.
Biotin
A building-block nutrient that helps strengthen and condition the hair you have.
Rosemary
Supports a healthy scalp environment and helps invigorate circulation at the roots.
Saw Palmetto
A long-standing scalp-care ingredient, included at a meaningful level rather than a token drop for the label.
Caffeine
A well-studied cosmetic scalp ingredient, working at the roots where clean, conditioned-looking hair starts.
Real routines, on camera
From creators who tried it
I feel like I have a spa in my shower.
Super Mom JoanieGifted
an improvement in the texture of my hair and that it feels softer
Smart Shopper FindsGifted
my scalp actually felt less itchy and a bit more balanced
Lindsey CarusGifted
it is kind of viscous, like a little bit like honey coming out
Jacob WeyandGifted
It lathers really well [...] a little bit goes a long ways
SCO SHOWGifted
I don't feel like I need to even put product in my hair
Nate McCallisterGifted
it gives your scalp a really clean feeling
Sam's Prime PicksGifted
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.
FAQ
Is thinning hair hereditary?
Is thinning hair hereditary?
For many people, thinning runs in the family. You can’t change your genes, but a consistent scalp-care routine, a balanced diet, and managing stress can all help you look after the hair you have.
Does washing my hair too often cause thinning?
Does washing my hair too often cause thinning?
Washing itself doesn’t, but harsh cleansers can dry out your scalp. A gentle, sulfate-free shampoo two to three times a week is kinder to a fragile scalp. Pat hair dry rather than rubbing.
Can stress affect my hair?
Can stress affect my hair?
Stress can play a role in shedding for some people. Staying active, resting well, and giving your scalp a little regular care all help.
The honest timeline
What to expect, week by week.
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. Not impressed? Keep the bottle — money back.
Individual results may vary. This timeline reflects typical customer-reported perception 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.
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.
