Best Seller

4.9 · 1,640 Verified Reviews

The Hair Multiplier

Lightweight Growth Serum

15x best-seller, powered by Swiss 7-Stem Concentrate®, a complex of seven alpine botanicals selected for their ability to encourage longer, thicker hair in as little as 3 months.

96% saw thicker hair by week 8*

Formulated for fine and normal hair

95% natural formula,

no hormones

Absorbs instantly,

weightless feel

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We recommend a minimum of 3 months of consistent use to see results.

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Made

in Switzerland

Dedicated

Concierge Care

Proudly Made in Switzerland

120 Day Money-Back Guarantee

Dedicated Concierge Support

TIMELINE

Your Hair Grows In

3-Month Cycles

Inside the first cycle. Month by month.

Month 1

Reset & Rebalance

The first month is quiet on the surface, but it's when the foundation gets set. Years of buildup, inflammation, and DHT-driven stress have left your scalp in survival mode. Applying 2mL each evening, the Awakening dose, saturates the scalp with Swiss 7-Stem Concentrate® and calms inflammation while signaling shedding follicles back into the anagen growth phase. Visible changes are minimal. The biological work is happening beneath the surface.

Month 2

New Density Begins

The work beneath the surface starts to show. Baby hairs emerge along your part line. Strands at the temples feel sturdier. Shedding has stopped. With the foundation set, 1mL nightly is now enough to keep Swiss 7-Stem Concentrate® strengthening each follicle and extending its time in the active anagen phase, the only phase where hair actually grows. Density quietly returns.

Month 3

Extended Growth & Length

By month three, your hair feels and looks noticeably different. Existing strands are thicker, fuller, denser at the root. Hairs that were shedding in Month 1 have re-entered anagen and are emerging as new length. One full cycle is complete. Density has returned to the root and mid-lengths — and with every cycle that follows, the fullness travels further down the strand, toward your ends.

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1,640+ TRUSTED REVIEWS

TESTIMONIALS

What Happens When

You Stay Consistent?

These women were. Here's what they chose to document. Their timelines, in their own words.

Before

Month 0

After

Month 3

Verified 5 Star Review

"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!!"

"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

— Amanda H. | 35-44 | Suffered with stress and postpartum-related hair loss

Before

Month 0

After

Month 3

Verified 5 Star Review

"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."

"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

— Magdalena S. | 35-44 | Suffered with weak, brittle hair

Before

Month 0

After

Month 4

Verified 5 Star Review

"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 75 days 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. Soo happy I didn't quit."

"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

— Elena M. | 25-34 | Suffered with unexplained shedding and thinning

RESULTS

Following 3 Months Of

Daily Application

+96%

Reported visibly

thicker, fuller hair by week 8*

+90%

Saw a noticeable increase in length and hair softness by month 3.*

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.

No Sulfates (SLS/SLES)

No Parabens

No Phthalates

No Synthetic Fragrances

No Dyes

No Harsh Preservatives

No Animal Testing

MADE IN SWITZERLAND

From 3,000 Metres

Above Ground Level

Born in the world’s most remote alpine environments, these botanicals endure where few species can.

Key Function

Supports scalp health and extends the active growth phase

Key Function

Strengthens scalp elasticity and reduces dryness and breakage

Key Function

Improves scalp health and makes hair appear visibly thicker and fuller

Key Function

Stimulates follicle activity and stops follicle shrinkage

Aqua (Water), Glycerin, Caffeine, Erythritol, Niacinamide (Vitamin B3), Potassium Sorbate, Lactic Acid, Sodium Benzoate (Gentle Preservative), Amaranthus Caudatus Seed Extract, Acetyl Tyrosine, Sodium Hyaluronate (Hyaluronic Acid), Zea Mays Starch, Chlorella Vulgaris/Lupinus Albus Protein Ferment, Leontopodium Alpinum Extract (Swiss Edelweiss), Gluconolactone, Glycine, Larix Europaea Wood Extract, Sodium Metabisulfite, Phenethyl Alcohol (Plant-Derived Preservative), Benzyl Alcohol (Non-Drying Natural Preservative), Phenoxyethanol, Caprylyl Glycol, Citric Acid (pH Adjuster), Camellia Sinensis (Green Tea) Leaf Extract, Zinc Chloride, Calcium Gluconate, Tocopherol (Vitamin E)

FORMULATION

Made To Mirror

Your Scalp Biology

Formulated for women, with ingredients your body recognizes, not resists.

Non-hormonal, with no disruptors or harsh additives

Balanced pH mirrors your scalp's natural environment.

Top 1% EWG

clean ingredients score.*

*Based on data obtained from the Environmental Working Group Skin Deep® ingredients scoring tool, Jan 2025.

How to Apply

The Hair Multiplier

Apply directly to dry or damp scalp, focusing on problem areas.

Gently massage into the scalp. Leave in and allow to dry naturally and style as usual.

Frequently Asked

Questions

Most women notice less shedding within the first few weeks. Followed by softer, healthier-feeling hair by month one. Baby hairs and added density typically become visible by month two. From month three, visible length and ongoing growth can start to show.

Results compound. The women who see the most significant transformation are the ones who stay consistent, supporting their hair through its ongoing natural growth cycle.

When application is inconsistent, build-up and oxidative stress return. This signals to the follicle that the scalp environment isn’t suited to growth. Hair transitions out of active growth and into resting and shedding.

Most hair growth products coat the strand or force growth with synthetic ingredients. The Hair Multiplier works differently. It targets the scalp environment and follicle directly, restoring the conditions your hair needs for healthy ongoing growth. This is why women who have tried everything else are finally seeing results with The Hair Multiplier.

Yes. Apply the serum directly to your scalp every evening, focusing on the areas where you'd like to encourage new growth.

Because extensions can place extra tension on fragile strands, we recommend gentle, low-tension styles while your hair strengthens. New hair is at its most delicate as it grows, so treat it with care.

No. The Hair Multiplier's weightless consistency absorbs into the scalp in seconds and leaves behind no residue. This means you can apply the formula daily without washing more often or hair becoming heavy or oily.

Yes. The Hair Multiplier® is ideal for those with compromised hair. Formulated with pure alpine botanicals, selected for their strengthening and restorative properties, its bioactive ingredients repair weakened strands, revitalize dormant follicles, and restore a healthy growth environment, leading to reduced breakage and revealing visibly healthier hair.

The Hair Multiplier® is fragrance-free and contains no synthetic perfumes to prevent scalp irritation.

Some women notice a slight, temporary increase in shedding in the first few weeks. This is usually a small portion of resting hairs completing their natural cycle and releasing, making room for new, stronger strands to form.

Meanwhile, the rest of your hair continues to strengthen and thicken in its active growth phase. Think of it as a gentle reset of the growth cycle: the hairs that release are gradually replaced by healthier, more resilient ones.

The Hair Multiplier® is plant-based and non-hormonal, formulated without minoxidil, finasteride, or hormonal actives. Many of our customers first come to us during the postpartum stage, when shedding is especially common, and use it to support their hair through that transition. That said, every pregnancy is different, and we can't make individual medical recommendations. If you're pregnant, breastfeeding, taking medication, or managing a health condition, please check with your doctor before use.

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Swiss 7-Stem Concentrate®

The result of years of research into alpine botany and the biology of human hair, our proprietary complex blends seven rare alpine botanicals, scientifically proven to support hair health and encourage natural growth.

Origin

The principal botanical, the Matterhorn Edelweiss Flower, blooms on the rocky slopes of the Matterhorn mountain. For centuries, the peak stood untouched, a fatal pursuit for mountaineers. Where human endurance falters, the Edelweiss Flower endures. To survive, it developed exceptional self-repair and protection systems, producing high concentrations of antioxidants and phytonutrients.

Function

Edelweiss Flower is scientifically proven to sustain the hair’s natural growth cycle by energizing follicle cells and preserving collagen integrity. Naturally abundant in antioxidants and vitamins A, C, and E, it protects the scalp from UV and environmental stress while reinforcing follicle structure to reduce breakage and support lasting growth.

Effect

The hair’s natural growth cycle is restored and new growth is shielded from external stressors, revealing stronger, healthier, and visibly longer hair.

Amaranth Seed Extract

One of the world’s oldest cultivated grains, Amaranth Seed Extract combines ancient botanical wisdom with modern bioactive science to support strand integrity and improve hair health for continuous growth.

Origin

Known as the Velvet Flower, Amaranth Seed Extract was rediscovered in the 1880s after five centuries of obscurity. Amaranth was once a sacred staple of Aztec and Incan civilizations before its cultivation spread across Asia, Africa, and Europe. Today, it is valued worldwide for its rich bioactive profile and deeply restorative properties.

Function

Amaranth Seed’s lightweight molecular structure penetrates deeply without irritation, replenishing the hair’s natural protein and repairing weakened strands. Rich in squalene and essential fatty acids, it locks in moisture, strengthening scalp elasticity and enhancing nutrient absorption to reduce dryness and breakage.

Effect

Hair appears visibly healthier and fuller with the strength and vitality to support new, continuous natural growth.

Bio-Fermented Hyaluronic

Acid

Capable of holding 1,000 times it's own weight in water, hyaluronic acid binds moisture to the skin and hair, improving elasticity and scalp health while making hair visibly thicker and fuller.

Origin

Naturally bio-fermented in Switzerland using plant-based substrates before being purified at low temperatures to preserve molecular integrity. This process allows for precise control of molecular weight, creating a lower-weight HA that penetrates deeper to enhance hydration and improve absorption.

Function

Long, chain-like molecules bind water and bioactive nutrients to hyaluronic acid, allowing deep absorption into the scalp’s protective barrier. This ensures every element of the formula is activated while hydrating the scalp to sooth irritation, prevent follicle damage, and plump strands.

Effect

Restores the scalp’s natural growth environment by maintaining a healthy barrier and strengthens existing strands so hair appears thicker and fuller.

Alpine-Purified Caffeine

A natural growth stimulant, caffeine extract energizes follicles and extends the hair’s natural growth phase.

Origin

Harvested from organic green coffee plants grown in high-altitude microclimates. These alpine environments slow the ripening process and enhance drainage, producing higher-quality beans with greater concentrations of bioactive compounds.

Function

Caffeine promotes hair growth by improving scalp health and stimulating follicle activity. It boosts blood circulation to deliver oxygen and nutrients essential for growth, while antioxidant properties protect against environmental damage. By blocking DHT, the hormone responsible for follicle shrinkage, and supporting ATP production and IGF-1 expression, it ensures hair remains in its active growth phase longer.

Effect

Caffeine extract helps stimulate natural growth, resulting in visibly longer, stronger hair that’s protected from and more resilient to damage.

4.9
Rated 4.9 out of 5 stars
Based on 1,364 reviews
Total 5 star reviews: 1.2k Total 4 star reviews: 146 Total 3 star reviews: 4 Total 2 star reviews: 4 Total 1 star reviews: 5
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1,364 reviews
  • Lisa D.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Rated 5 out of 5 stars
    1 week ago
    Just started!

    It’s only been 2 days and I feel like I love this so much because it feels like water! I put it on at night and slept in it but also put it on once I washed my hair today and will leave on all day and it makes it soft and easy to wear as opposed to an oil. I have a dozen hair oils and so far this has made my hair the softest overnight! Can’t wait to see if it helps over time and will write again with my review! To be continued…. ❤️

    Was this helpful?
  • Chloe
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 25-34
    What is your hair length? Medium
    What is your hair type? Straight
    What are your hair concerns? Want longer hair, Hair too thin , Hair damage or breakage, Scalp irritation or dandruff
    How long have you been using it for? 3 months
    What improvements have you noticed? Hair is longer, Hair is thicker / fuller, Ends look healthier
    Rated 5 out of 5 stars
    2 weeks ago
    I AM AMAZED

    the hair multiplier works! My nails and hair are growing longer and stronger. It’s an absolute revelation. I was under the impression that my hair and nails were nice but limited genetically. For the first time in my life I have thick growing hair and nails.

    Was this helpful?
  • Brooke F.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 45-54
    What is your hair length? Long
    What is your hair type? Curly
    What are your hair concerns? Hair loss or shedding
    How long have you been using it for? More than 3 months
    What improvements have you noticed? Hair is longer, Hair feels softer , Ends look healthier
    Rated 4 out of 5 stars
    3 weeks ago
    For length and faster growth -yes! But didn't help my hair shedding

    I love this product for several reasons, but unfortunately the main reason I ordered was hair shedding and it hasn't touched that. I absolutely love the clean ingredients and no strong perfume. It's super easy to use and doesn't make my hair greasy at all. In fact, it's really helped improve the texture of my hair! My hair is often frizzy and this has helped. I am on my 8th bottle, so I have given it a fair shot. If it even reduced my shedding by 50% I would be devoted forever, but I keep shedding like crazy, which I'm sure is related to peri-menopause. This product helps it grow back fast, but then I see all these short hairs in the shower like 2-3" long and I know I'm just losing the new growth too. For the costly monthly expense I'll have to try something else. But too bad because it's almost perfect.

    Was this helpful?
  • Francesca
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 25-34
    What is your hair length? Medium
    What is your hair type? Wavy
    What are your hair concerns? Hair loss or shedding
    How long have you been using it for? 3 months
    What improvements have you noticed? Less shedding
    Rated 5 out of 5 stars
    1 month ago
    So far, so good!

    Ive been using this for almost 3 months and have noticed new baby hairs growing in and less shedding in the shower! Reordering another 3 month supply :)

    Was this helpful?
  • Dhana H.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    What is your hair length? Long
    What is your hair type? Curly
    How long have you been using it for? 3 months
    What improvements have you noticed? Hair feels softer
    Rated 4 out of 5 stars
    1 month ago
    So far so good.

    Hoping to get better results

    Was this helpful?
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Your subscription delivers a fresh 6-month supply every 6 months, automatically. You can skip, pause, or cancel anytime through your account or by emailing hello@lejardinswitzerland.com.

By subscribing, you authorize Le Jardin Switzerland to charge $418 every 6 months starting today. Your subscription continues automatically until you cancel — and you can cancel anytime, with no fees.

We'll send a reminder email 3 days before each renewal, so there are no surprises. Full terms at Terms of Service.