The Hair Serum

The Hair Serum

$69
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The Hair Serum
  • The Hair Serum
  • The Hair Serum
  • The Hair Serum
  • The Hair Serum
  • The Hair Serum
  • The Hair Serum
  • The Hair Serum
The Hair Serum

26 reviews

The Hair Serum

Fortifying Scalp & Hair Serum

An advanced, anti-thinning scalp serum that provides targeted nutrients and skincare-level treatment to the scalp, hydrating, balancing scalp microbiome and supporting natural hair growth cycles for stronger, fuller and thicker-looking hair. Delivers 1 billion plant-based exosomes per dropper. Absorbs quickly for all hair lengths and textures. Fragrance-free.
Risk free for 60 days

At Caldera Lab, our goal is to help you discover products that are the perfect fit for your skin, health, and lifestyle. While we do not accept returns, we proudly offer a 60-day satisfaction guarantee. If you try a product and it doesn’t work for you, simply contact us within 60 days of your purchase and we’ll make it right.

Please note that while we’re happy to honor this guarantee, we’re unable to process multiple refunds for the same product. We monitor refund activity and reserve the right to limit or refuse a refund if we find our policy has been misused.

Our Customer Care team is always here to answer any questions you may have before or after purchase. We want you to feel confident in your skincare journey, and we’re committed to your satisfaction. Please reach out to us anytime at help@calderalab.com.
Shipping details

Orders ship from our facility in the U.S. within 1-2 business days of receipt and for U.S. orders generally arrive at your doorstep 3-4 days later. International orders ship via various priority carriers and delivery time may vary by country. You will receive an email with a tracking number when your package ships, so you can follow your order to your doorstep.
  • NO ANIMAL
TESTING

    NO ANIMAL
TESTING

  • NO HARSH CHEMICALS

    NO HARSH CHEMICALS

  • PARABEN FREE

    PARABEN FREE

  • SILICONE FREE

    SILICONE FREE
Shampoo Stats 1

Proven to reduce hair fall, strengthen hair and soothe the scalp.

  • 100%

    Agree hair looks fuller and thicker

  • 96%

    Agree hair appears to have less shedding

  • 98%

    Agree hair feels stronger

  • 2.3x Reduction in visible hair fall

  • 28%

    Improvement in visible cuticle damage.

  • Dermatologically tested

See Clinical Results

How to Use The Hair Serum

Apply 1-2 pipettes to dry or damp scalp. Part hair in the middle and on both sides, apply the serum directly to the scalp and gently massage in with fingertips. Leave in, do not rinse.

For best results, use as part of The Hair Care System.
Shampoo Feature

The Cornerstone of our Anti-Thinning Hair Care Routine

Men’s scalp have higher oil production and frequent build up and scalp irritation. By balancing the scalp microbiome, The Hair Serum creates an optimal environment for healthy hair growth. It is formulated with plant exosomes, highly concentrated nanovesicles that deliver bioactive nutrients to the scalp. With continued use after 12 weeks, hair is visibly thicker and fuller, and clinically proven to experience less hair fall out from breakage.

 About The Science

Unrivaled ingredients

Every ingredient is carefully selected for its nutrient profile and backed by research to work for men's skin. Plant-based and 100% fair trade.

All ingredients

Aqua/Water/Eau, Glycerin, Propanediol, Pentylene Glycol, 1,2-Hexanediol, Butylene Glycol, Creatine, Curcuma Longa (Turmeric) Root Extract, Panthenol, Arginine, Lactic Acid, Caffeine, Methyl Diisopropyl Propionamide, Eclipta Prostrata Extract, Hydrolyzed Pea Protein, Hydrolyzed Vegetable Protein, Glycine Soja (Soybean) Germ Extract, Triticum Vulgare (Wheat) Germ Extract, Xanthan Gum, Piper Nigrum (Pepper) Seed Extract, Sarcosine, Sodium Phytate, Gluconolactone, Camellia Sinensis Leaf Extract, Capsicum Annuum Fruit Extract, Lycium Chinense Fruit Extract, Sophora Flavescens Root Extract, Scutellaria Baicalensis Root Extract, Phyllanthus Emblica Fruit Extract, Sodium Benzoate, Angelica Gigas Root Extract, Malus Domestica Fruit Cell Culture Extract, Potassium Sorbate, Angelica Dahurica Root Extract, Lithospermum Erythrorhizon Root Extract, Morus Alba Root Extract, Pinus Palustris Leaf Extract, Polygonum Multiflorum Root Extract, Rubus Coreanus Fruit Extract, Myrothamnus Flabellifolia Leaf/Stem Extract, Phytic Acid, Ascorbic Acid, Citric Acid, Biotin, Calcium Gluconate, Glycoproteins, Oligopeptide-2
ExoDense™ Complex

ExoDense™ Complex

Supports scalp microbiome, natural growth cycles and hair strength. Comprised of plant exosomes, adaptogenic botanicals, caffeine and essential minerals

Biomimetic Peptides

Biomimetic Peptides

Helps improve hair resilience and reduce hair thinning by strengthening the hair shaft

Amino Acids

Amino Acids

Fortify hair fibers and nourish the scalp

Plant Stem Cells

Plant Stem Cells

Support skin regeneration and help protect against external aggressors

PROVEN BY SCIENCE. TRUSTED BY MEN

Mario Lopez

Actor

“Someone handed me Caldera + Lab. No promo, no pitch, just this product that worked. So I stuck with it.”

Dave Annable

Actor

“Caldera + Lab's daily routine has amazing products. I use them every single day.”

Mind Pump

Podcast

“Caldera + Lab has figured this out.”

Tony Gonzalez

Football Hall Of Famer

“You need to try Caldera + Lab's routine. It's gonna make you feel better, it's gonna make you feel fresher, it's gonna make you feel younger.”

Frequently asked questions

How does the serum contribute to stronger, thicker-looking hair?

It supports a balanced, hydrated scalp and reinforces hair fibers, reducing breakage and promoting a visibly thicker, stronger appearance.
Is it safe for daily use?

Yes, its lightweight, fast-absorbing formula is perfect for daily use without causing buildup, ensuring ongoing scalp and hair support.
Can this serum be used on all hair types and lengths?

Absolutely. Whether you have short, long, or in-between hair, the fast-absorbing, non-greasy formula is designed for everyone. It seamlessly fits into any routine without leaving sticky residue.
Is this hair serum safe for color-treated hair?

Yes. Our serum is 100% color safe and sulfate-free, meaning it won’t strip or wash out your hair color. Crafted with high-performance ingredients, including plant exosomes & botanicals, to protect and support your hair’s vibrancy while nourishing the scalp.
I am prone to scalp irritation. Is The Hair Serum good for me?

Our formula was designed to help soothe the scalp, with plant-based, non-irritating ingredients. A clinical study and an irritancy study confirms product safety. If you are concerned about irritation, try a patch test first on skin.

Brand Ps
Brand Ps

Transform Your Skin and Hair Health

CUSTOMER REVIEWS

Overall rating: 4.6666665 / 5 from 27 reviews.

AI Generated Review Summary

Summary topics

Review topics: ["hair","smell","results","difference","shine","serum"].

Review highlights

Reviews

As an actor, it’s a MUST

"I’ve absolutely loved using Caldera + Lab’s Hair Serum. As an actor, taking care of my hair and scalp is an important part of what I do, especially with the constant styling, products, long days on set, and changes that come with different roles. What I appreciate most is how easy this has been to incorporate into my routine while still feeling like a genuinely premium product. My hair and scalp feel healthier and better cared for, and it’s become something I consistently reach for."

— Cody B. (5/5)

"Amazing product. 2nd time repurchasing the hair serum after buying the caldera lab hair system the first time. At 35 jus started to experience youthfulness leaving the hair this product has halted thinning and grays. Restored and rejuvinated a healthy look and after consistency as started to promote new growth where a small bald/thinning patch was occurring. Amazing product. If you dont got money for the whole hair kit. This product is very much a stand alone product if need be and does wonders. Growth takes a lil time but literally one application is all it takes to see a difference visually in the health of your hair. -Will"

— Lauren (5/5)

Have loved this product - feels like a reset for my scalp

"My scalp had been feeling really dry and in need of nourishment. The scalp serum did the trick and after a month my hair and scalp feel a lot better. It also has helped with thickness and texture."

— David B. (5/5)

"Good"

— Rene (5/5)

Hair Serum

"I have been using it for a month, my hair seems to be improving but it is really hard to tell this early. I am also using other products along with it."

— Lazor T. (4/5)

"It didn’t not work for me"

— Djenebou D. (1/5)

"I still have Hope, but I have been using it twice daily for three weeks now and unfortunately I don’t see any improvement. The eye serum doesn’t do anything for my bags under my eyes so honestly, I will give it another month. Ok"

— Brian (1/5)

Works great!

"Works great!"

— Robert B. (5/5)

"Fantastic product. Like all of their products, this serum delivers an all natural powerful punch. Need to be consistent, but my hair is definitely looking healthier"

— ANDREW (5/5)

Very good

"Nice"

— David B. (5/5)

Q&A

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