Roll & Grow — Leave-In Hair Density Serum | Medulla Clinic
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Hair Growth Roll-On Serum — Created for Fast, Visible Results

Shampoos wash off. Pills take months. Roll & Grow puts 10+ bioactive ingredients directly on the scalp, where hair is actually made — in 30 seconds a day, with no grease and no rinsing.

🇪🇺 Made in the EU Roll & Grow leave-in hair density serum
  • 90% of Roll & Grow users reported less shedding and increased new hair growth after 12 weeks of use
  • Leave-in serum — 30 seconds: roll, massage, done
  • Pleasant scent — botanical, not like a pharmacy
Join 10,000+ happy customers
★★★★★ ★★★★★ 4.7/5 See reviews →
🛡️ 30-day money-back guarantee 🚚 Fast and FREE shipping across Canada 🇪🇺 Made in the EU 🔬 Dermatologically tested 💇‍♀️ For all hair types
Built properly

Engineered, Not Bottled

Tap a feature to see how it works

Roll & Grow serum bottle and rollerball
01

Steel rollerball

A stainless-steel ball, not plastic. It glides along the part without dragging, feels cool on the scalp, and releases a measured amount with every pass — so you never over- or under-apply.

What makes it different

Most Serums Treat Your Hair.
Ours Targets Your Scalp.

Roll & Grow pairs a blend of scalp-care actives with a new way to apply them. The steel rollerball places the serum precisely on the scalp — at the base of each strand — instead of on hair that can't absorb it.

Where your serum actually ends up

✕
Shampoo
Rinsed away

About a minute of contact, then down the drain.

✕
Dropper
Often sits on hair

Drops can land on the strands before they reach the skin.

✕
Spray
Scatters

Mist settles over hair rather than targeting the scalp.

✓
Roll & Grow
Lands on the scalp

Applied directly at the base of each strand, where you aim it.

✓ Applying Roll & Grow with the rollerball along a hair part
✓Along the part
✓ Applying Roll & Grow at the hairline on curly hair
✓At the hairline
✓ Applying Roll & Grow at the temple
✓At the temples
Why this format

How It Compares

Generic categories, not named brands — so you can see the trade-offs honestly.

Roll & Grow serumRoll & Grow Hair-growth shampoo Oral supplements Salon treatments
Applied directly to the scalp✓✓✕✓
Stays on for hours✓~60 secn/avaries
No pills✓✓✕✓
Daily, at home✓✓✓✕
Time to apply30 seconds2–5 mina few seconds1 hour+
No rinsing or mess✓✕✓✕
Works with protective styles✓partly✓partly
Typical monthly costfrom CA$29.90CA$20–60CA$30–90CA$150+

Cost ranges are typical market prices and vary by product and provider.

Shop Roll & Grow 30-day money-back guarantee
What's inside

Four Ingredients Doing the Heavy Lifting

🌴

Batana Oil

Scalp nourishment

A rich plant oil traditionally used for hair, carrying fatty acids that condition the scalp and help the rest of the formula spread evenly.

🌿

Rosemary Extract

Botanical

One of the most widely used botanicals in scalp care, and the source of the serum's fresh, natural scent.

💧

Biotin

Hair-structure support

A B-vitamin associated with keratin, the protein hair is built from.

☕

Caffeine

Scalp stimulation

A common active in topical scalp products, included for its role in scalp-care formulations.

Real customers

Hear From Our Customers

★★★★★ Rated 4.7 / 5 by our customers

Joanna M. — after 90 days 90-day result
★★★★★
Widening part

“After 3 months, my hair has completely transformed. The density and volume are incredible, and areas that were thinning are now full of life. I only wish I'd started sooner.”

Joanna M. ✓ Verified buyer
Roll & Grow Serum
Heather L. — after 80 days 80-day result
★★★★★
Receding temples

“I'm genuinely impressed. My hair feels significantly stronger, and I'm already seeing new baby hairs sprouting where it used to be thin. It actually works — I'm a convert.”

Heather L. ✓ Verified buyer
Roll & Grow Serum
Angela R. — after 120 days 120-day result
★★★★★
Excessive shedding

“I used to be so self-conscious about my thinning part. The transformation has been life-changing. You can see the increased density in my photos. I finally feel like myself again.”

Angela R. ✓ Verified buyer
Roll & Grow Serum
90-day user trial What users reported after 90 days of daily use
94%
reported less daily hair loss
83%
reported visibly thicker strands
74%
reported new growth in thinning areas
Self-reported outcomes from a 90-day user trial. Individual results vary.

Customer photos shared with permission. Individual results vary.

What to expect

Hair Grows Slowly. Here's the Honest Timeline.

Hair grows about a centimetre a month, so this asks for patience. We'd rather tell you that now than have you give up in week three.

1–2

Weeks 1–2

Nothing visible yet. You're building the habit — that's normal.

2–4

Weeks 2–4

Often the first change: less hair in the brush and the shower.

4–8

Weeks 4–8

Fine new growth may appear along the part and hairline.

8–12

Weeks 8–12

Where visible density usually shows — a full growth cycle.

Results vary. Hair depends on age, hormones, health and genetics, and no serum works the same way for everyone.
Take a photo of your part today, in the same light you'll use later — it's the best way to see real change.

Shop Roll & Grow Start today — results build week by week
In their own words

See It in Real Life

Real customers, real routines. Tap 🔈 to hear them.

Shop Roll & Grow From CA$29.90 / bottle · ships within 24 hours
Choose your supply

Start Small, or Commit to the Full Cycle

1 Bottle
30-day starter
CA$49.90
CA$39.90
CA$39.90 per bottle
Save 20%
  • Try it with no commitment
  • Free shipping in Canada
  • 30-day money-back guarantee
Try one bottle
2 Bottles
60-day supply
CA$99.80
CA$69.90
CA$34.95 per bottle
Save 30%
  • Enough to see early changes
  • Free shipping in Canada
  • 30-day money-back guarantee
Get 2 bottles
Best value · Full cycle
3 Bottles
12-week protocol
CA$149.70
CA$89.70
CA$29.90 per bottle
Save 40%
  • Covers a full growth cycle
  • Lowest price per bottle
  • 30-day money-back guarantee
Get the 12-week protocol

All prices in Canadian dollars. One-time purchase — no subscription, no hidden fees.

Simple & effective

3 Steps. Under 60 Seconds.
Every Single Day.

1

Roll & Glide

Run the steel rollerball directly over your part, hairline or thinning areas. It puts the formula straight onto the scalp in seconds.

2

Massage & Absorb

Gently massage the lightweight, non-greasy serum into your scalp with your fingertips. It has a pleasant botanical scent — not like a pharmacy. No rinsing needed; let it absorb and carry on with your day.

3

Stay Consistent

Apply once daily. Visible change usually takes 8–12 weeks, but many people notice less shedding and a healthier-feeling scalp within the first 2–4 weeks.

30Day guarantee

Try It Properly. Or Send It Back.

If it isn't for you, contact us within 30 days of delivery for a full refund of the product price — used bottles included. No interrogation, no restocking fee.

Questions

Frequently Asked Questions

Hair grows about a centimetre a month, so this takes patience. Many people notice less shedding first, around weeks 2–4. Visible density usually takes 8–12 weeks — a full growth cycle. If you're hoping for results in a fortnight, this isn't the product for you, and we'd rather say so now.

If you want to try it first, start with one bottle — it lasts about 30 days. If you already know you want to give it a proper chance, the 12-week protocol covers a full growth cycle at the lowest price per bottle.

No. It absorbs into the scalp within seconds and leaves no film on the hair, so you can style as normal straight afterwards.

Yes. It contains no sulfates or bleaching agents and is applied to the scalp rather than the hair shaft, so it won't affect colour, relaxers or keratin treatments.

Yes. Roll & Grow is applied to the scalp rather than the hair, so it works the same way on straight, wavy, curly and coily hair. It's also suitable for relaxed, coloured and chemically treated hair, and the narrow rollerball reaches the scalp under braids, cornrows and other protective styles without disturbing them.

No. Every option is a one-time purchase. You won't be charged again unless you place another order yourself.

Contact us within 30 days of delivery for a full refund of the product price, used bottles included.

No. Roll & Grow is a cosmetic product. It isn't intended to diagnose, treat, cure or prevent any disease, and it isn't a substitute for advice from a doctor. If your hair loss is sudden, patchy or accompanied by other symptoms, please see a doctor.

Free guide

Not Ready Yet? Get the Thinning Hair Guide.

What changes with age, what actually reaches the scalp, and how to tell real progress from wishful thinking. Free, straight to your inbox.

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Smiling woman holding Roll & Grow serum
Ready when you are

Feel Like Yourself Again

From CA$29.90 per bottle, free shipping across Canada, and thirty days to decide.

Shop Roll & Grow
The 90% figure is based on [source — e.g. a self-reported survey of N customers after 12 weeks of daily use].

Roll & Grow is a cosmetic product. It is not intended to diagnose, treat, cure or prevent any disease, and is not a substitute for medical advice. Individual results vary.
Roll & GrowFrom CA$29.90 / bottle · free shipping
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