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
The Hair Serum
The Hair Serum
The Hair Serum
Supports Thicker, Fuller Hair

The Hair Serum

An advanced hair serum that delivers 1 billion plant-based exosomes per dropper to provide concentrated, targeted nutrients directly to the scalp. Powered by advanced plant exosomes, peptides, and biomimetic amino acids, the serum supports the scalp’s natural barrier, creating the perfect environment for stronger, fuller-looking hair.

Most Popular
Membership Benefits
  • Set your pace: Adjust frequency and shipping addresses to subscribed products.
  • Flexible Plan: Pause, reactivate, skip or cancel anytime at no extra cost.
  • Special Member Pricing: Enjoy 20% discount on products.
  • Priority access to support: Front-of-the-line access to customer care.
choose frequency
Unsure of frequency? Take quiz. Take frequency quiz.
45 Days
60 Days
75 Days
- 1 +
risk-free-icon Ships Fast + Risk Free for 60 Days.
Ships Fast + Risk Free for 60 Days.
We stand behind our products with a 'No Questions Asked' 60-day satisfaction guarantee. Keep the bottle and we'll send you a 100% refund. It's that simple.
shipping-box-icon Shipping Details
noun_Shipping_1541529 Created with Sketch. 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.

Upgrade to The Hair Care System

Product Image for The Hair Care System

The Hair Care System

Designed to be Used Together

$167
How To Use + + Rectangle

Use as a routine - each product is designed to work together to support your hair and scalp ecosystem.

  • Shampoo: Apply to wet hair, massage into the scalp, and rinse thoroughly.
  • Conditioner: Apply to damp hair, focusing on the lengths and scalp. Leave in for 1 minute, then rinse.
  • Hair Serum: Apply 2-3 pipettes nightly 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. 

 

Ingredients + + Rectangle
Plant Exosomes Image Plant Exosomes Image
Plant Exosomes

Support Fuller-Looking Hair

Plant-derived nanovesicles designed to deliver bioactive peptides and essential nutrients to the scalp, supporting the look of fuller, healthier hair. Extracted using proprietary technology.

Peptides Image Peptides Image
Peptides

Help Maintain the Scalp’s Barrier

Designed to help maintain the scalp’s protective barrier, supporting a balanced, refreshed scalp that is essential for strong, resilient hair.

Amino Acids Image Amino Acids Image
Amino Acids

Nourish & Fortify Hair Fibers

Inspired by the body’s natural proteins, these Biomimetic Amino Acids help nourish and fortify hair fibers, supporting  hair’s strength and resilience.

Plant Stem Cells Image Plant Stem Cells Image
Plant Stem Cells

Targeted Follicular Nourishment

Powerful phytonutrient extracts derived from resilient Swiss botanicals, they play a critical role in follicular nourishment by delivering highly concentrated growth factors, antioxidants and essential nutrients directly to scalp and follicles.

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

See All Ingredients
FAQs + + Rectangle

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 & support your hair’s vibrancy while nourishing the scalp.

4 boxes showing the hair serum being applied to hair
×
Already have a membership?

Log in now to add new products to your already existing subscription. Receive all of your products in one easy shipment.

Forgot Password?
Don't have a membership?

If you’ve never had a subscription with us, continue to shop on this page and checkout as normal.

Continue Shopping

How to Use

Use as a routine - each product is designed to work together to support your hair and scalp ecosystem.

  • Shampoo: Apply to wet hair, massage into the scalp, and rinse thoroughly.
  • Conditioner: Apply to damp hair, focusing on the lengths and scalp. Leave in for 1 minute, then rinse.
  • Hair Serum: Apply 2-3 pipettes nightly 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. 

 

Ingredients

Plant Exosomes Image Plant Exosomes Image
Plant Exosomes

Support Fuller-Looking Hair

Plant-derived nanovesicles designed to deliver bioactive peptides and essential nutrients to the scalp, supporting the look of fuller, healthier hair. Extracted using proprietary technology.

Peptides Image Peptides Image
Peptides

Help Maintain the Scalp’s Barrier

Designed to help maintain the scalp’s protective barrier, supporting a balanced, refreshed scalp that is essential for strong, resilient hair.

Amino Acids Image Amino Acids Image
Amino Acids

Nourish & Fortify Hair Fibers

Inspired by the body’s natural proteins, these Biomimetic Amino Acids help nourish and fortify hair fibers, supporting  hair’s strength and resilience.

Plant Stem Cells Image Plant Stem Cells Image
Plant Stem Cells

Targeted Follicular Nourishment

Powerful phytonutrient extracts derived from resilient Swiss botanicals, they play a critical role in follicular nourishment by delivering highly concentrated growth factors, antioxidants and essential nutrients directly to scalp and follicles.

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

See All Ingredients

FAQs

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 & support your hair’s vibrancy while nourishing the scalp.

4 boxes showing the hair serum being applied to hair

Real Results

Healthy-looking hair starts with a well-nourished scalp. The Hair Serum supports the scalp’s natural balance and reinforces hair fibers to help improve the look and feel of hair with continued use.

  • 1 Billion

    exosomes per dropper

  • 3 Years

    of research on scalp and hair science

  • 30+

    high-performance ingredients

Clinical Results
Clinical Results

More Products to Consider

Customer Reviews

NO EDITS. NO PAID REVIEWS OR INCENTIVES

Certifications

Caldera + Lab is committed to Transparency, Sustainability, and Excellence. Our products are certified by the world’s leading, independent regulatory agencies.

Certified Logos
Certified Logos
Certified Logos