The Hair Multiplier™
Lightweight Growth Serum, 30mL
For women with thin, slow-growing hair, The Hair Multiplier™ increases visible hair density in as little as 3 months. Powered by 7-Stem Concentrate™, seven alpine peptides that enhance the hair’s natural growth cycle for thicker, longer hair.
- Drug-free
- Hormone-free
- Made in Switzerland
- Vegan
- 100% natural origin
- Sensitive-scalp safe
- Water-light texture
- Extension-safe
- Fragrance-free
- Gluten-free
- Nut-free
or 4 payments of $51.50 with Shop Pay
120-day guarantee
No visible results after 120 days, full refund. No bottles to return.
Order now for US delivery by July 27, 2026
- Strands look thicker from the first cycle
- Supports density where the part widens
- Fewer broken hairs on the pillow
- Absorbs in under 60 seconds, no residue
- Calms and hydrates the scalp
- Gentle enough for nightly use
- 95% Naturally Derived Ingredients
- Top 1% EWG Clean Ingredients Score*
- No Hormone Disruptors
- No Animal Testing
- Hand Harvested From Switzerland
- Proprietary Plant Based Formula
- No Synthetic Fragrances
Timeline
Your hair works in
90-day cycles
Inside the first cycle. Month by month.
- Month 1
Groundwork
Nothing visible yet — and that is expected. Years of buildup, tension and oxidative stress have pushed many follicles into their resting state. The 2 mL Foundation dose saturates the scalp with 7-Stem Concentrate™ each night: inflammation settles, the barrier rebalances, and resting follicles receive the signal to re-enter their active growth phase. Breakage on the pillow is usually the first number to drop.
- Month 2
First signs
The underground work surfaces. Short new hairs appear along the part line; strands at the temples feel sturdier when you pull them back. From here, 1 mL per night is enough — the complex keeps each follicle in anagen, the only phase where hair actually lengthens. Shedding keeps declining while density quietly rebuilds at the root.
- Month 3
The cycle completes
One full 90-day cycle done, and it shows. Existing strands measure thicker at the root, the part line reads narrower in photos, and the hairs that shed in month 1 are back in active growth, emerging as new length. From this point, each additional cycle carries the fullness further down the strand, toward the ends.
Documented results
What consistency
looks like
Customers who complete a full cycle document it here — their timelines, their words.
Before · Month 0
After · Month 3“I decided to give this serum a try and I’m SO glad I did!”
“Post-divorce my hair started falling out, and vitamins and proper nutrition alone weren’t cutting it. A year later and my hair wasn’t regrowing properly. I decided to give this serum a try and I’m SO glad I did! Don’t hesitate to try it. Before and after photos attached. Good luck with your hair journey!!”
Results: Fuller middle part, thicker hair
Before · Month 0
After · Month 3“My hair used to stay around bra-strap length, but now it’s growing longer and looks healthier. I truly feel beautiful with my natural hair again.”
“I started with one bottle, and after that I subscribed to receive a refill every three months. I am now finishing my third bottle after about two and a half months, and I can’t wait for my next refill to arrive.”
“I’ve noticed such a beautiful difference in my hair. It feels softer, shinier, and much stronger than before. I also feel like my hair is growing faster.”
“For many years I had blonde hair because I was covering my grey hair. Recently I decided to return to my natural color, and this product has been part of that journey. My hair used to stay around bra-strap length, but now it’s growing longer and looks healthier.”
“I truly feel beautiful with my natural hair again. I’m excited to continue this journey and keep using this brand.”
Results: Gained length, hair feels softer and stronger
Before · Month 0
After · Month 4“I'm so happy I didn't quit...my hair is noticeably thicker”
“It actually works!!! This is the first time in my life I am writing a review about something because THIS WORKS. Not sponsored and not a paid review. These are around 4 months apart. My sides have nearly filled in plus my hair is noticeably thicker when I tie it up or run my fingers through it. Consistency is KEY, about 80% of the new hairs you're seeing didn't even appear until early month 3. So happy I didn't quit.”
Results: Thicker hair, improved hair density
Results
Following 3 Months Of
Daily Application
wk 2
wk 4
wk 6
+96%
wk 8
Reported visibly thicker, fuller hair by week 8*
+90%
Saw a noticeable increase in length and hair softness by month 3.*
Reduction in visible hair breakage
95%
Improvement in shine and softness
90%
Reduction in hair shedding and fallout
86%
Noticeable improvements reported in the first 10 weeks*
*Based on a self-reported 12-week consumer-use survey of 80 participants using The Hair Multiplier twice daily. Individual results vary. Cosmetic product — not intended to diagnose, treat or cure any condition.
- No Sulfates (SLS/SLES)
- No Parabens
- No Phthalates
- No Synthetic fragrance
- No Dyes
- No Harsh preservatives
- No Animal testing
Made in Switzerland
Grown at 3,000 metres,
where little else survives
High-altitude plants endure cold, wind and UV by concentrating protective compounds. Those compounds are the formula.
Swiss 7-Stem Concentrate™
Supports scalp health and extends the active growth phase.
High-altitude Swiss valleys, where plants survive by producing unusually dense protective compounds.
Amaranth Seed Extract
Strengthens scalp elasticity and reduces dryness and breakage.
Cold-pressed amaranth seed, a grain cultivated for millennia and prized for its protein density.
Bio-fermented Hyaluronic Acid
Improves scalp health and makes hair appear visibly thicker and fuller.
Fermented from plant substrates, then cold-purified to preserve the molecule's chain length.
Alpine Purified Caffeine
Stimulates follicle activity and helps counter follicle miniaturization.
Organic green coffee grown at altitude, where slow maturation concentrates the active.
Full ingredients list
Aqua (Water), Glycerin➁, Caffeine, Erythritol, Niacinamide (Vitamin B3), Potassium Sorbate, Lactic Acid, Pentylene Glycol, Potassium Hydroxide, Butylene Glycol, Sodium Benzoate, Amaranthus Caudatus Seed Extract, Acetyl Tyrosine, Sodium Hyaluronate (Hyaluronic Acid), Urtica Dioica (Nettle) Leaf Extract➀, Zea Mays Starch, Chlorella Vulgaris/Lupinus Albus Protein Ferment, Leontopodium Alpinum Extract (Swiss Edelweiss), Gluconolactone, Glycine, Larix Europaea Wood Extract, Sodium Metabisulfite, Phenethyl Alcohol, Benzyl Alcohol, Phenoxyethanol, Caprylyl Glycol, Citric Acid, Camellia Sinensis (Green Tea) Leaf Extract, Zinc Chloride, Calcium Gluconate, Tocopherol (Vitamin E)
➀ Ingredients from organic farming · ➁ Made using organic ingredients.
Formulation
Made to Mirror
Your Scalp Biology
Formulated for women, with ingredients the body recognizes rather than resists.
Non-hormonal — no endocrine disruptors, no minoxidil, no harsh additives
pH balanced to the scalp's own range, so the barrier never fights the formula
Water-based and silicone-free — actives reach the root, nothing sits on it
100%
ingredients of natural origin
Ecocert COSMOS Natural
The formula is COSMOS NATURAL certified by ECOCERT Greenlife according to the COSMOS Standard: ingredients of natural origin, environmentally responsible production, no GMO ingredients, recyclable packaging.
Read the COSMOS Standard on ecocert.comSupport
Frequently asked
questions
Our guarantee
Protected for 120 days.
Opened or not.
Why 120 days
A growth cycle takes roughly 90 days. We cover the full cycle plus a month, so the formula is judged on its actual timescale.
Take a day-one photo
Hair changes slowly, then obviously. Day to day you will see nothing; day 1 against day 120, side by side, settles it.
Nothing to send back
No visible improvement, write to hello@lejardinswitzerland.shop with your order number. Full refund, bottles stay with you. A short questionnaire is all we ask.
Customer reviews
Rated 4.8 by 1,502 women
4.8
Based on 1,502 reviews
250+ reviews with photos and details
Sort: Featured
Amanda H.
Verified BuyerFeatured3 days agoI recommend this productIt’s Worth the Investment, Ladies!
Let me tell you what a journey my hair loss has been! Post-divorce my hair started falling out, and vitamins and proper nutrition alone weren’t cutting it. A year later and my hair wasn’t regrowing properly. I decided to give this serum a try and I’m SO glad I did! I use the product 2x per day - morning and night. I’ll use the micro needling roller once per week. The one downside is I felt like the bottle didn’t quite last a month, but based on my results it’s worth the investment! Don’t hesitate to try it. Good luck with your hair journey!!
- Age 35-44
- Medium length
- Thick, curly
- Using for 2 months
Noticed: Hair looks healthier · Filled in bald spots
Jill G.
Verified Buyer1 week agoI recommend this productGreat results!!
I am so glad I found this product! I’ve only been using it for about six weeks and I started noticing a difference at three weeks only! My hair is very thin and is starting to feel like it was getting thinner and then I started using the serum and it’s definitely thicker. I’m actually shocked that it works this well, and my next shipment isn’t coming for another few weeks, so I’m a little bummed because I have to slow down with how much I’m using it until it arrives. Anyway, I highly recommend it and I hope you enjoy its results as well!
- Age 55+
- Medium length
- Wavy
- Using for 2 months
Noticed: Hair is thicker / fuller
Kelly
Verified BuyerFeatured5 days agoI recommend this productShocked, in the best way!
I have been using Le Jardin for about two months now and am shocked by how much thicker my hair has become and how much faster it is growing. I had my hair done in February and generally I can go 4-5 months before having my hair highlighted again because my hair grows so slowly and you usually can't see the root fully grow out until around that 4 month mark. However, I have had to move my June appointment up because my hair has grown so fast! Even my boyfriend has commented on how thick it feels and is starting to look. I had a lot of doubts starting out because I have tried so many things. I started using Le Jardin at the beginning of February, right after my last highlight appointment. Will continue to use and update more!
- Age 35-44
- Medium length
- Wavy
- Using for 2 months
Noticed: Hair is longer · Hair is thicker / fuller · Less shedding · Hair feels softer · Ends look healthier
Meryl
Verified BuyerFeatured2 weeks agoI recommend this productLove It
One month into applying Le Jardin, my hair line is becoming more solid and my hair is looking fuller.
Can't wait to see the results that month number two bring.
- Age 55+
- Short
- Straight
- Using for 1 month
Noticed: Hair is thicker / fuller
Beth F.
Verified Buyer10 days agoI recommend this productNoticeable at the two-month mark
Around two months in, my part looked narrower. The hair fall had decreased considerably by then. Fuller overall now. Repurchasing.
Brenda R.
Verified Buyer3 weeks agoI recommend this productLess shedding, more volume
By month two the drain situation had improved a lot. Hair along my part is visibly fuller now. Simple as that.