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BEST-SELLER

The Hair Multiplier
The Hair Multiplier
The Hair Multiplier
The Hair Multiplier
The Hair Multiplier
The Hair Multiplier

4.95 (1,317 Verified Reviews)

The Hair Multiplier

Lightweight Growth Serum

Our 15× best-selling serum, crafted in Switzerland from 95% naturally derived ingredients that mirror the scalp's biology to encourage thicker, longer hair in as little as 6 weeks.

Powered by Swiss 7-Stem Concentrate® and refined to a weightless molecular texture that absorbs instantly.

Thickens hair by up to 94%*

Grow 3" of length in 3 months*

No hormone disruptors

For low & high porosity hair

1 Month Supply

Recommended By Experts

2 Months + Get 1 FREE

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2 Month Supply + 1 FREE

$218

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2 Month Supply + 1 FREE Every Delivery

$188

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3 month supply, delivered every 3 months

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Free express shipping

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Mystery gift included each month

+ FREE Titanium Advanced Dermaroller

+ FREE Titanium Advanced Dermaroller

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$218

Order now to receive by December 19, 2025
Pay in 4 interest-free payments of $56 with Installment options
Pay in 4 interest-free payments of $56 with Installment options

"Our research shows best results come from uninterrupted daily application for 3 months. Hair follicles operate on natural 3 month growth cycles and require consistent support throughout the full cycle to produce thicker, fuller strands."

Sophie L. — Director of Research

Clinical Formulations & Hair Biology Division

95% Naturally

Derived Formulation

150 Day Money

Back Guarantee

Dedicated Hair

Concierge Support

The Hair Multiplier® was designed for women aiming to grow thicker, longer hair without feeling the weight of heavy oils.

Its ingredient composition is most effective for those with:

  1. Fine or thinning strands that lack volume or density.

  2. Hair growth that has slowed or plateaued.

  3. Hair that breaks before reaching its desired length.

  4. Ends that weaken or have split over time.

For optimal freshness, store The Hair Multiplier™ in the refrigerator. Chilling preserves the potency of its botanicals and delivers a cooling sensation that soothes the scalp and stimulates circulation.

We call this the cold application method, and while it’s completely optional, it’s easily one of our favorite rituals.

Application:

  1. Apply in the morning & evening, one full dropper is recommended per use. Do not rinse.

  2. Apply directly onto the scalp, concentrating on areas in need of support.

  3. Using fingertips, perform a gentle massage to encourage absorption and stimulate follicle activity.

  4. Keep serum refrigerated between each use.

You’ll start to crave this part of your routine — and your scalp will thank you for it.

Take up to five full months to really see your transformation unfold. If you are not completely happy with the results, we will issue a full refund, no questions asked.

The Hair Multiplier

2 Months + Get 1 FREE

add to BAG

$188

TESTIMONIALS

What Happens When

You Stay Consistent?

These women saw thicker, healthier growth from daily use. Proof of what’s possible when consistency meets the right routine.

Before

Month 0

After

Month 3

5.0 / 5.0

"I've been a fine hair girl my whole life, this added real thickness"

"Heard someone on a podcast talk about this so I figured I'd try and see if this is the real deal. The first pic is from January 10th, and the second is April 28th. Ladies... this thing is liquid gold. I've been fine haired my whole life and this added real thickness to my hair. The progress has been unbelievable. Ordered two more for my mom and my sister."

"Heard someone on a podcast talk about this so I figured I'd try and see if this is the real deal. The first pic is from January 10th, and the second is April 28th. Ladies ... this thing is liquid gold. I've been fine haired my whole life and this added real thickness to my hair. The progress has been unbelievable. Ordered two more for my mom and my sister."

Results: Fuller middle part, thicker hair

— Ashley T. | 🇺🇸 Verified Customer | 3 Pack

Before

Month 0

After

Month 2.5

5.0 / 5.0

"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 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. So happy I didn't quit."

Results: Thicker hair, improved hair density

— Elena M. | 🇨🇭 Verified Customer | 3 Pack

Before

Month 0

After

Month 3

5.0 / 5.0

"I could honestly cry... my confidence has skyrocketed"

"I was shedding around the middle area of my head for unknown reasons. Stress? bad eating habits? Not sure what it was. I work as a nurse so i'm always on night shift. After seeing months of Le Jardin ads on Instagram, I thought what the hell, i'll try it. Pics are EXACTLY 3 months apart. I could honestly cry, my confidence has skyrocketed and I can finally take these extensions out. 10/10 worth the investment."

"I was shedding around the middle area of my head for unknown reasons. Stress? bad eating habits? Not sure what it was. I work as a nurse so i'm always on night shift. After seeing months of Le Jardin ads on Instagram, I thought what the hell, i'll try it. Pics are EXACTLY 3 months apart. I could honestly cry, my confidence has skyrocketed and I can finally take these extensions out. 10/10 worth the investment."

Results: Stopped shedding, healthier hair growth

— Leah H. | 🇸🇪 Verified Customer | 3 Pack

DATA BACKED BY SCIENCE

Following 3 Months of

Consistent Use

+94%

Reported visibly

thicker, fuller hair by week 6*

+90%

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

Noticeable improvements reported in the first

10 weeks

*Based on a self-reported 12-week consumer-use survey of 40 participants using The Hair Multiplier twice daily.

Swiss 7-Stem Concentrate®

The result of years of research into alpine botany and the biology of human hair, our proprietary complex unites 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.

INGREDIENTS

The World's Purest

Natural Ecosystem

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

Key Function

Reduces shedding and promotes visibly thicker hair

Key Function

Visible length retention and volume over time

Key Function

Improves scalp hydration, supports healthy growth cycles

Key Function

Extends hair growth phase and inhibits DHT in scalp

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)

No Sulfates (SLS/SLES)

No Parabens

No Phthalates

No Synthetic Fragrances

No Dyes

No Harsh Preservatives

No Animal Testing

INGREDIENTS

Made to Mirror Your

Natural Biology

Ingredients your body recognizes—not resists.

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Lorum Ipsum

Get 30% off your next skincare order by entering code at checkout:

No hormone disruptors or harsh additives

Balanced pH

levels mirror scalp's natural environment

Top 1% EWG

clean ingredients score.*

*Based on data obtained form the environmental working group Skin Deep® ingredients scoring tool, Jan 2025.

TRANSFORMATION TIMELINE

Your 3 Month

Hair Transformation

Two minutes. Twice a day.

Visible renewal in as little as three months

Month 1

Reset & Rebalance

Bio-fermented hyaluronic acid and alpine botanicals penetrate deep into the scalp, rebalancing the scalp barrier and flushing away weakened strands. We recommend taking a photo now, so you can easily compare the growth.

Month 2

Density Begins to Build

With the scalp now balanced, follicles begin functioning at higher capacity. Amaranth Seed peptides and Green Tea antioxidants fortify the follicle structure, improving keratin production and reducing breakage. Users may start noticing a visible increase in hair density — the first sign of stronger, healthier hair.

Month 3

Extended Growth & Fullness

Consistent nourishment keeps follicles in their active growth phase for longer. New density appears along the hairline and crown, breakage is reduced, and growth looks visibly longer, fuller, and stronger — a reflection of three months of true consistency.

TRY THE HAIR MULTIPLIER

150 Day Money Back Guarantee

The Jardin Difference

Bite isn’t just different, we’re better. Our comparison chart makes it clear — we’re the go-to for those who want their toothpaste both effective and earth-friendly.

Natural

Hair Products

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Hair Products

PLASTIC-FREE

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VEGAN + CRUELTY-FREE

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INFINITELY REFILLABLE

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CERTIFIED B CORP

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NO HARSH CHEMICALS

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MESS-FREE

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TRAVEL-FRIENDLY

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NHAP AND FLUORIDE OPTIONS

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Guaranteed Growth

or Your Money Back

If you don't see the growth you were hoping for after 150 days of consistent use, simply email us to receive a full refund on your purchase — no questions asked.

Commonly Asked

Questions

Yes. Apply the serum directly to your scalp twice daily, focusing on areas where you’d like to encourage new growth. Extensions can sometimes place extra tension on fragile strands, so we recommend opting for gentle, non-damaging methods while your hair strengthens. Remember, new hair is at its most delicate stage while it’s growing, treat it with care.

No. The Hair Multiplier’s formulation was specifically refined to a lightweight molecular consistency that absorbs effortlessly into the scalp, ensuring you receive the full benefits of the formula while leaving hair completely grease-free.

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 users may experience very light shedding when first introducing The Hair Multiplier. This is a healthy sign that dormant follicles are reawakening and replacing old, fragile hairs. The vast majority of your hair will continue to strengthen and thicken. Think of the light shedding as resetting the growth cycle. The shedding may happen either way, but The Hair Multiplier ensures those hairs grow back healthier.

4.9
Rated 4.9 out of 5 stars
Based on 1,317 reviews
Total 5 star reviews: 1.2k Total 4 star reviews: 134 Total 3 star reviews: 6 Total 2 star reviews: 4 Total 1 star reviews: 7
Write a Review (Opens in a new window)
1,317 reviews
  • Kate J.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 35-44
    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? 1 month
    What improvements have you noticed? Less shedding
    Rated 5 out of 5 stars
    1 week ago
    It really WORKS

    I have been using the hair multiplier for just shy of one month and I took a photo of the hair I was loosing in the shower on day 1 and then another on day 27 and the proof is in the photo. I knew it was working even before taking the photo bc I was dropping hair all over my house like I had been months prior. I also have so much new growth sprouting up. I am officially sold on this hair care.

    Was this helpful?
  • melissa C.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 45-54
    What is your hair length? Medium
    What is your hair type? Straight
    What are your hair concerns? Want longer hair, Hair too thin , Hair loss or shedding, Hair damage or breakage
    How long have you been using it for? 2 months
    What improvements have you noticed? Hair is thicker / fuller, Less shedding, Hair feels softer , Ends look healthier
    Rated 5 out of 5 stars
    2 weeks ago
    So far So good!

    Ordered it, like everything else I have tried, hoping THIS would make a noticeable difference and after a couple months, it has. I am very much enjoying the results of stronger less brittle thin hair. It feels good and I am excited to continue. A little pricey but there is always some deal going on which I appreciate.

    Love Swiss products!!!

    Was this helpful?
  • Lex
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 35-44
    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
    How long have you been using it for? 2 months
    What improvements have you noticed? Hair is thicker / fuller
    Rated 5 out of 5 stars
    2 weeks ago
    So far so good!

    I’ve only been using this 2 months and I’m seeing so much new growth. After my last super fun postpartum shed my hair just wouldn’t come back- and I needed some help! I also wanted to use something natural . Will definitely keep using to try and get my long hair back!

    Was this helpful?
  • Cecile K.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    Age 45-54
    What is your hair length? Long
    What is your hair type? Straight
    What are your hair concerns? Hair loss or shedding, Hair too thin
    How long have you been using it for? 2 months
    What improvements have you noticed? Less shedding
    Rated 5 out of 5 stars
    2 weeks ago
    Positive results so far

    I am 54 and, like many other women my age, I have been dealing with hair loss and thinning.

    I have been using the hair serum for a little over two months and I don't know if it is a coincidence but I feel that I am not losing my hair as much. Also, I am noticing more baby hair. I will reorder a 3 month supply and I am looking forward to seeing even more positive results.

    Was this helpful?
  • Stephanie
    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, Want longer hair
    How long have you been using it for? 1 month
    What improvements have you noticed? Less shedding
    Rated 4 out of 5 stars
    2 weeks ago
    Reduced hair loss

    I noticed less hair loss when I blow dry my hair within the first week of using the serum. I also liked that it’s not oily or heavy, which other products can be and caused my hair to fall out even more. Definitely recommend trying!

    Was this helpful?
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