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

BEST-SELLER

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

The Hair Multiplier

Ultra Lightweight Growth Serum

1,292 Verified Reviews

Get your teenage hair back with our 15x best-selling organic growth serum.

Powered by Swiss 7-Stem Concentrate™, our lightweight serum penetrates deep into the scalp to multiply growth in dormant follicles — helping you break past plateaus and grow thicker, longer hair in as little as 3 months.

Grow up to 3" in natural length*

Thickens hair by up to 96%*

No hormone disruptors

Suitable for low & high porosity hair

"Since hair regrows in 90 day cycles, we find that new baby hairs typically appear around the three month mark. That’s why we recommend daily use for at least 3 full months to see visible results."

Sophie Lamora, Director of Research

Clinical Formulations & Hair Biology Division

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Made with 95% Natural Ingredients

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  1. Targets hair follicles to support the growth of visibly thicker, fuller, longer hair

  2. Repairs the scalp’s natural hydration barrier, enhancing its ability to nourish hair for natural softness and shine

  3. Strengthens hair at the follicle level, effectively reducing shedding and minimizing shower fallout

Apply The Hair Multiplier straight from the fridge for a cool, refreshing dose of calm — like cucumber water for your scalp. We call this the cold application method, and while it’s completely optional, it’s easily one of our favorite rituals.

Chilling the serum helps preserve its potency, so you’re getting the freshest version of the formula each time you use it. The cooling effect also soothes irritation, boosts circulation, and turns a quick nightly step into something you actually look forward to.

How to apply:

  1. Push the button down twice firmly until the dropper is 80% filled

  2. Apply directly onto the scalp — focus on the areas you want to support most.

  3. Gently massage in with your fingertips

  4. Repeat until you’ve used one dropper total.

  5. Do not rinse.

  6. Apply twice daily for best results.

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

Try The Hair Multiplier risk-free for your first 150 days. If you’re not seeing the growth you wanted, we'll refund your money back—no questions asked.

From Skeptical To Speechless.

Real stories from women who once felt the same—and finally found what worked.

Before

Before

After

After

"Def my new holy grail hair serum..."

5.0 / 5.0

"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 product is liquid goldddd. I've been at terminal length for YEARS, this helped me finally break my plateau and make my middle-part area fuller too. The progress has been unbelievable 😭 Ordered two more for my mom and my sister."

— Ashley T. | 🇺🇸 Verified Customer

Before

Before

After

After

"Made my ponytail so much thicker"

5.0/5.0

"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."

— Elena M. | 🇨🇭 Verified Customer

Before

Before

After

After

"I could honestly cry right now...."

5.0/5.0

"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."

— Leah H. | 🇸🇪 Verified Customer

No Animal Testing (Ever)

No Hormone Disruptors

No Sulfates (SLS/SLES)

No Parabens

No Phthalates

No Synthetic Fragrances

No Dyes

No PEGs

No Drying Alcohols

Made to Mirror Your Natural Biology

Ingredients your body recognizes—not resists.

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No phthalates, parabens, or hormone disruptors

Neutral pH levels mimic your scalp's natural oils

Top 1%

EWG clean ingredients score.*

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

The Science of Transformation

96%

Reported visibly thicker, fuller, longer hair.*

90%

Reported a significant reduction in hair shedding and fallout.*

93%

Reported an improvement in the softness and shine of their hair.*

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

From Soil to Serum

Made with 95% organic ingredients chosen for purity and perfect harmony with your biology.

Swiss 7-Stem Concentrate™

The result of years of research into the biology of human hair, our proprietary complex brings together 7 rare alpine plant extracts—among them Swiss Edelweiss—selected for its role in supporting follicle health, reducing shedding, and promoting visibly fuller, thicker hair.

Origin: Hand-harvested from the Valais region of the Swiss Alps at elevations between 1,500 and 3,000 meters — where Swiss Edelweiss develops a naturally potent antioxidant profile under high UV exposure and extreme altitude.

Function: Rich in leontopodic acid and protective flavonoids, Swiss Edelweiss shields scalp and follicle cells from oxidative stress — a key trigger of premature shedding. It also helps preserve collagen integrity at the follicle root, supporting a stable environment for fuller hair growth.

Supports: Reduces shedding, improves scalp hydration, thickens hair follicles.

Organic Caffeine Extract

A bioactive compound extracted from organic green coffee beans, formulated to energize follicles and help inhibit DHT—supporting a longer, uninterrupted growth phase.

Origin: Harvested from organic green coffee plants grown in high-altitude microclimates, where slower ripening enhances the bioactive strength of the bean.

Function: This bioactive compound boosts follicle vitality by stimulating ATP production and blocking DHT, the hormone responsible for miniaturizing hair follicles. It also enhances IGF-1 expression to keep hair in its active growth phase longer.

Supports: Thicker hair follicles, improved circulation in scalp.

Bio-Fermented Hyaluronic Acid

A bio-fermented humectant that deeply hydrates the scalp, supporting optimal conditions for healthy, sustained hair growth.

Origin: Naturally bio-fermented in Switzerland using plant-based substrates, then purified at low temperatures to preserve molecular integrity.

Function: A low-molecular-weight hydrator that penetrates deeply into scalp tissue, enhancing moisture retention and improving nutrient diffusion to hair follicles.

Helps maintain a healthy, elastic scalp barrier.

Supports: Improves scalp hydration, supports healthy growth cycles.

Amaranth Seed Extract

One of Earth’s most powerful plant proteins, Amaranth Seed reinforces strands from within—minimizing breakage and helping hair retain length over time.

Origin: Harvested from one of Earth’s most nutrient-dense plants, amaranth seeds are rich in bioactive peptides and replenishing lipids—essential nutrients for stronger strands and a healthier scalp.

Function: Exceptionally high in bioactive peptides and squalene, Amaranth Seed Extract reinforces follicle structure, strengthens the scalp’s barrier, and reduces moisture loss. It also activates renewal deep at the root by supporting dermal papilla cell activity.

Supports: Visible length retention and volume where it once felt impossible.

Made with 95% Natural Ingredients

Clinically Tested for Sensitive Scalps

No Silicones

No Sulfates

No Parabens

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)

Five Targets. One Proven Formula

Clinically Proven, Naturally Gentle.

Organic caffeine, sodium hyaluronate, and bio-fermented lupine protein help anchor strands at the root, reducing visible shedding and fortifying the follicle over time.

Swiss Edelweiss and fermented botanicals help calm irritation and rebalance the scalp's natural oil levels, reducing dryness and visible flaking.

Amaranth seed extract, acetyl tyrosine, and protein-rich microalgae support visibly denser strands by nourishing follicles and encouraging fuller diameter regrowth.

Niacinamide, zinc, and amino acids support optimal follicle function by fueling cellular repair and extending the natural growth cycle. Bioactive peptides and amaranth extract help reinforce strand integrity, allowing hair to grow visibly longer with less breakage over time.

Amaranth seed extract and vitamin E deliver essential lipids and antioxidants that fortify the hair shaft from within. By strengthening each strand’s structure, they help prevent splitting and breakage—preserving softness, elasticity, and length.

How To Apply The Hair Multiplier

Easily fits into any hair routine.

Watch Now

Frequently Asked Questions

Powered by Swiss 7-Stem Concentrate™, our lightweight serum penetrates deep into the scalp to multiply growth in dormant follicles — helping you break past plateaus and grow thicker, longer hair in as little as 3 months.

Once your order is successfully placed, you will receive a confirmation email with your order details, including your order number and a summary of your purchase. If you do not receive an email within a few minutes, please check your spam or promotions folder. If you still can’t find it, feel free to contact our customer support team for assistance.

We process and ship orders as quickly as possible to ensure fast delivery. If you need to change your shipping address, please email our customer support team within 24 hours of placing your order. While we will do our best to accommodate your request, we cannot guarantee changes once the order has been processed for shipping.

Yes, we ship internationally! We partner with premium logistics providers like DHL and UPS to ensure your package arrives safely and on time. Plus, we include free shipping insurance with every order for extra peace of mind.

Delivery times depend on the shipping speed you selected at checkout. On average, orders arrive within 5-8 business days (weekends not included), plus 2 business days for order processing. You will receive a tracking number as soon as your order ships so you can follow its journey to your doorstep.

4.9
Rated 4.9 out of 5 stars
Based on 1,293 reviews
Total 5 star reviews: 1.1k Total 4 star reviews: 131 Total 3 star reviews: 6 Total 2 star reviews: 4 Total 1 star reviews: 7
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1,293 reviews
  • Maria S.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    What is your age range? 25-34
    What are your main concerns? Hair too thin, Hair shedding, Bald spots
    What is your hair type? Thin, Straight
    What is your hair length? Medium
    How often are you applying this? Every day
    How many months have you been using this for? 90 days (3 months)
    What improvements have you actually noticed? Hair is thicker, Filled in bald spots
    Rated 5 out of 5 stars
    4 months ago
    Worth the investment

    I have tried cheaper priced stuff in the past (Ordinary, rosemary oil, amazon serums) and i've come to the conclusion that you get what you pay for. CHEAP products always made my scalp red and irritated. This is the first time I spent more on a hair product after battling with years of hair loss due and age and stress. Conclusion: I'm happy I did. This works if you're very consistent. I've taken photos of my hair 3 months apart. I've noticed significant regrowth in areas that we once bare. There is also hardly any fallout in the shower anymore. I have a shower drain catcher so I can check. Even my hairdresser says it's a noticeable improvement. I've just began my 4th bottle now to keep the momentum going. Wonderful product. Will continue to buy and recommend to others.

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  • Dawn F.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    What is your age range? 55-64
    What are your main concerns? Hair too thin, Hair shedding, Bald spots
    What is your hair type? Thin, Straight
    What is your hair length? Medium
    How often are you applying this? Every day
    How many months have you been using this for? 90 days (3 months)
    What improvements have you actually noticed? Hair is thicker, Hair looks healthier, Filled in bald spots
    Rated 5 out of 5 stars
    4 months ago
    Ladies, it WORKS

    I bought this hair serum not expecting very much (I have "old-soul" hair and tried every thing). I'm pleasantly surprised. I've used Minoxidl before but it was too heavy and greasy which I hated. I've been following Le Jardin for years so when I saw the new serum I got the 3 pack and have been at it for a full 3 months now; I see my bald areas filling in nicely (pics to chuckle at) and the rest of my hair has grown out really long. It's not instant; however, it does work. The smell is fresh and light (I get compliments often on the smell), and the fluid itself is lightweight so I don't feel like I need to wash my hair often. Overall i'd buy again.

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  • Nessa C.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    What is your age range? 18-24
    What are your main concerns? Hair won't grow past certain length
    What is your hair type? Thick, Straight
    What is your hair length? Long
    How often are you applying this? Every day
    How many months have you been using this for? 60 days (2 months)
    What improvements have you actually noticed? Hair is longer, Hair looks healthier
    Rated 5 out of 5 stars
    4 months ago
    Hair grew 2 inches!!!

    An influencer I watch mentioned this on a podcast so I gave it a shot and tbh i'm more amazed than I expected. Not only made my hair feel thicker but it made my hair grow FAST. I feel like it wont stop growing now and my boyfriend says I have way too much hair😭. I apply twice a day because I have a trip coming up and I didn't have time to wait 6 months for growth. So happy with the results so far. I always am gonna reach for this. It didn’t weigh my hair down at all and never left my scalp or hair greasy which has always been a worry for me. Def an A+ in my eyes.

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  • Kelly W.
    Verified Buyer
    Reviewing
    The Hair Multiplier
    I recommend this product
    What is your age range? 35-44
    What are your main concerns? Hair shedding, Bald spots
    What is your hair type? Thick, Straight
    What is your hair length? Medium
    How often are you applying this? Every day
    How many months have you been using this for? 60 days (2 months)
    What improvements have you actually noticed? Hair is thicker, Filled in bald spots
    Rated 5 out of 5 stars
    5 months ago
    OBSESSED

    A friend from my pilates class suggested this and I am obsessed!! It has really really started to help regrowth on my hair and thicken it in the short time i've been using it (about 2 months) Easy to put into my routine and use. Doesn't irritate my scalp at all and I just really love this hair growth support from Le Jardin! The scalp hydration is my FAVORITE part is hands down to really protect the hair barrier! Highly recommend by far!!

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