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Best Seller

4.9 (1,640 Verified Reviews)

The Hair Multiplier

Lightweight Growth Serum

Our 15× best-seller, powered by Swiss 7-Stem Concentrate®, a complex of seven alpine botanicals that mirror the scalp's biology and extend the hair's natural growth phase.

Refined to a weightless consistency that absorbs without residue.

94% saw thicker hair by week 6*

Extends hair's growth phase

No hormone disruptors

Absorbs instantly,

no residue

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Made

in Switzerland

Dedicated

Concierge Care

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

Its ingredient composition is most effective for those with:

  1. Fine or thinning hair that lacks volume or density.

  2. Hair growth that has slowed or plateaued.

  3. Hair that has breakage before reaching its desired length.

The Hair Multiplier® is a nightly leave-in treatment designed to work in rhythm with your hair's natural growth cycle.

For your first month, we recommend applying 2mL of The Hair Multiplier® rather than 1mL.

Think of this as an awakening ritual. In these early weeks, the follicle is at its most receptive and most primed to respond, and this concentrated cadence is how we awaken the scalp and set the foundation for everything that follows.

After the first month, you'll transition to the standard once-nightly ritual to maintain and build on those results.

We call this The Awakening Phase. It is the single most important month of your journey with the formula.

Application:

  1. Apply 1mL to a dry or slightly damp scalp each evening.

  2. Press the pump 2–3 times to fill the dropper entirely.

  3. Apply directly to the scalp, focusing on areas of concern.

  4. Gently massage with fingertips to encourage absorption.

  5. Leave in and allow to dry naturally. Do not rinse.

  6. During your first month, repeat once more before bed to complete The Awakening Phase.

Results continue to develop over time. That's why all purchases are covered by our 120-day money-back guarantee. If you don’t love your results, we’ll gladly provide a full refund.

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 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

5.0 / 5.0

"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."

"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."

"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 3

5.0 / 5.0

"I am finally feeling more confident and hopeful"

"I am EMOTIONAL over the results from using this product about 6 months. After ELEVEN YEARS, I am finally feeling more confident and hopeful. I have so much hair growing back in that it looks hilarious, sticking out all different directions. I am so incredibly grateful that I didn’t give up."

"I am EMOTIONAL over the results from using this product about 6 months. After ELEVEN YEARS, I am finally feeling more confident and hopeful. I have so much hair growing back in that it looks hilarious, sticking out all different directions. I am so incredibly grateful that I didn’t give up."

Results: Healthier hair growth, sparse patches filling in

— Alyssa W. | 25-34 | Suffered with hair thinning and shedding

Before

Month 0

After

Month 4

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 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

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 80 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 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.

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.

No hormone disruptors or harsh additives

Balanced pH

levels mirror 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.

TRANSFORMATION TIMELINE

Your Hair Grows In

3-Month Cycles

Inside the first cycle. Month by month.

Month 1

Reset & Rebalance

From the very first application, The Hair Multiplier® sinks deep into the scalp to restore the environment your follicles depend on to grow. Powered by Swiss 7-Stem Concentrate®, the scalp is gently rebalanced and cleared of buildup that weakens developing strands. The scalp feels calmer, cleaner, and more receptive to growth. This is the foundation phase, the quiet work that makes everything else possible. We recommend taking a photo now, so you can easily compare the growth.

Month 2

New Density Begins

With the scalp now balanced, follicles begin functioning at a higher capacity. Swiss 7-Stem Concentrate® helps strengthen the follicle structure itself, improving how keratin is formed and how strands anchor into the scalp. Fine, fragile hairs begin to thicken, baby growth becomes more noticeable, and your hair starts to feel fuller, stronger, and more resilient to daily stress. This is the phase where density quietly returns.

Month 3

Extended Growth & Length

By the third month, your follicles are no longer just growing. They are staying in their active growth phase longer. Consistent nourishment from Swiss 7-Stem Concentrate® helps prolong the anagen growth cycle. New growth fills in sparse areas, and length becomes visibly more noticeable, leaving hair fuller at the roots, longer through the ends, and stronger from scalp to tip. This is when your transformation becomes unmistakable, not by forcing growth, but by restoring the conditions your hair was always designed to thrive in.

TRY THE HAIR MULTIPLIER

120 Day Money-Back Guarantee

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® 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 notice a very light increase in shedding when first introducing The Hair Multiplier®. This typically involves a small portion of resting hairs, usually around 5% or less, completing their natural renewal cycle so new, stronger strands can begin forming.

At the same time, the remaining 95%+ of your hair continues to strengthen, thicken, and remain in its active growth phase. Think of this as a gentle reset of the growth cycle. The hairs that release are naturally replaced with healthier, more resilient strands over time.

The Hair Multiplier® is a topical, leave-in scalp serum formulated with our Swiss 7-Stem Concentrate® and 95% naturally derived ingredients, designed to work in harmony with the scalp’s natural rhythm.

It does not contain retinoids, prostaglandin analogues, prescription actives, minoxidil, synthetic fragrance, essential oils, or hormone-disrupting ingredients.

Pregnancy and breastfeeding naturally heighten skin sensitivity and can change how the body absorbs topical products. Because we have not conducted pregnancy-specific clinical trials, we recommend speaking with your doctor before use to determine what feels right for you.

Some expecting and nursing customers choose to pause during pregnancy, while others continue their routine without issue.

Your comfort and confidence always come first.

120 Day

Money-Back Guarantee

Results continue to develop over time. That's why all purchases are covered by our 120-day money-back guarantee. If you don’t love your results, we’ll gladly provide a full refund.

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.

5.0
Rated 5.0 out of 5 stars
Based on 287 reviews
Total 5 star reviews: 287 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
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287 reviews
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