Home/Collagen/Keratin Hair Growth Booster Capsules
Hair / skin / nails

Keratin Hair Growth Booster Capsules

★★★★★ 4.9 · 1,000+ reviews
5,000 mcg Biotin + Hydrolyzed Keratin + Saw Palmetto

Our 30-capsule advanced beauty support formula combines high-potency biotin (5,000 mcg), hydrolyzed keratin peptides, and saw palmetto berry extract — three of the most widely studied nutrients used in hair and nail wellness protocols.

AMOUNT
$55.00

One-time purchase · Free shipping on orders over $60

Clinically shown in 30 days
153%
improvement in skin texture
138%
increase in skin smoothness
140%
improvement in fine lines and hydration
Free shipping $60+30-day guaranteeLab certifiedSustainable
Provides what collagen can't+
Cysteine forms the disulphide bonds that give hair its strength - something collagen cannot provide.
What's Inside

Targeted Hair Growth. One clean protein.

No blends you can't pronounce, no fillers padding the capsule - just hydrolyzed keratin your body can absorb.

01
Hydrolyzed Keratin
Star Protein, 400mg
Keratin peptides broken down small enough to absorb through the gut and reach the follicle. Sustainably sourced from lamb wool.
02
Saw Palmetto
200mg
Widely researched for supporting scalp health and helping regulate DHT, a hormone associated with hair thinning.
03
Biotin
5,000 mcg
a clinically studied B-vitamin essential for keratin production (healthy hair growth cycles, nails & eyelashes).
04
Sustainably Sourced
Lamb wool, no slaughter
Derived from wool - a byproduct, not a slaughter product. Vegetarian, not vegan.
05
3rd-Party Tested
0 metals, toxins, fillers
Every batch is tested by an independent lab for heavy metals, toxins, and fillers.
06
GMP Certified
Made to standard
Manufactured in a GMP-certified facility under strict quality controls - consistent, clean, and traceable.
Keratin Hair Growth Booster Hydrolyzed Keratin Peptides Thicker Hair - Stronger Nails - Better Skin Vegetarian Collagen Alternative Results in 30 Days Keratin Hair Growth Booster Hydrolyzed Keratin Peptides Thicker Hair - Stronger Nails - Better Skin Vegetarian Collagen Alternative Results in 30 Days
What is Keratin?

The protein your hair is literally made of.

Keratin is the primary structural protein that makes up your hair, nails, and the outer layer of your skin. When keratin levels are depleted - by heat styling, chemical treatments, or aging - the damage shows: breakage, dullness, thinning, frizz.

Our formula uses hydrolyzed keratin - broken into smaller peptides for optimal absorption - sourced sustainably from lamb wool.

Keratin is what hair is made of
Over 90% of your hair shaft is keratin protein. Supplementing it directly feeds the structure that makes hair strong.
Hydrolyzed for real absorption
Standard keratin molecules are too large to absorb. Ours are hydrolyzed and broken into peptides your body can actually use.
Commonly known as vegetarian collagen
Keratin is clinically proven to nourish skin cells and trigger your body's own collagen IV and VII production - without animal collagen.
35%
faster skin cell growth in clinical trials
Keratin - The Vegetarian Collagen

The protein your body already knows how to use. Now in a capsule.

Hydrolyzed. Purified. Absorbed. Keratin that actually reaches your follicles - not just your fingertips.

VegetarianLamb-wool sourced
No FillersJust keratin
3rd Party TestedEvery batch
GMP CertifiedMade in the USA
No Taste or SmellEasy to take
60 Capsules30-day supply
Keratin vs. Collagen

Two proteins. Different jobs. Both essential.

Collagen and keratin work on different structures. Together, they cover everything. Alone, each has a gap.

Keratin

The structural protein of hair itself

Keratin is the primary building block of the hair shaft, nail plate, and skin surface. It's rich in cysteine - a key amino acid that forms the disulphide bonds that give hair its strength.
Directly builds and strengthens the hair shaft
Rich in cysteine - what collagen cannot provide
Triggers production of collagen types IV and VII
Works at the follicle level, not just the surface
Collagen

The structural protein of the dermis

Collagen builds the dermal matrix - the deeper layer of skin where firmness, elasticity, and moisture live. It does not directly strengthen hair shafts the way keratin does.
Supports skin firmness, elasticity, and hydration
Provides glycine and proline for dermal structure
Supports joints, gut lining, and nail bed matrix
Most effective when combined with keratin
30
Days to results
Thicker, stronger, glossier strands reported within the first month
35%
Faster skin cell growth
Acceleration of skin cell regeneration shown in clinical research
7
Days for skin
Benefits begin showing in skin within one week of consistent use
14
Days for hair
Hair and follicle improvements typically noticeable from day 14
Ingestible vs Topical

Why pills work better than shampoo.

Topical keratin treatments temporarily coat the hair shaft with a protein film. It washes out. It doesn't reach the follicle. Ingestible keratin travels through your bloodstream directly to the follicle and supports the root of the problem.

Topical Treatments
Only coats the surface
Washes out over time
Never reaches the follicle
Doesn't change new growth
Ingestible Keratin
Reaches the follicle via bloodstream
Supports new growth from the root
Builds structure, not just appearance
Benefits compound with consistent use
reported in 30 days
Less
shedding & breakage

What changes when you commit.

Hair, nails, skin - keratin supports all three at once. Because they're all built from the same protein.

Thicker, fuller hair
Hydrolyzed keratin peptides strengthen the hair shaft and support follicle health, leading to visibly thicker strands and reduced shedding.
Glossier, smoother strands
Keratin fills structural gaps in the hair cuticle, reducing frizz and giving hair the smooth, glossy finish of a salon treatment - from the inside.
Stronger nails, less breakage
Nails are made primarily of keratin. Daily supplementation reduces brittleness, splitting, and breakage.
Skin firmness and cell renewal
Keratin has been shown to support faster skin cell renewal and firmer-looking skin, signalling collagen types IV and VII.
Reduced shedding and breakage
Cysteine - the amino acid keratin is rich in - forms the disulphide bonds that give hair its structural integrity.
Anti-inflammatory skin support
Keratin's anti-inflammatory properties soothe irritated skin, restore moisture, and strengthen the outer epidermis.
Hair
Thicker strands, less shedding, stronger follicles, glossier finish.
Nails
Harder, smoother nails that grow out without splitting or peeling.
Skin
Faster cell renewal, improved barrier strength, firmer texture.
Real Results

Hair that speaks for itself.

30-day results from women who took Keratin Hair Growth Capsules consistently every day. No filters. No special treatments. Just keratin doing its job.

Less shedding
91%
Stronger strands
88%
More gloss
85%
Would repurchase
96%
DAY 1
DAY 30
Better Together

Keratin covers what collagen can't.

Collagen supports the skin matrix - the deeper dermis layer. Keratin supports the hair shaft and outer skin layer - exactly where collagen falls short. Together, they provide complete structural support from the inside out.

We recommend taking keratin capsules alongside your daily collagen drink for complete hair and skin support.
A picture with a bowl filled with Keratin with Biotin Hair Boosters Capsules by Crushed Tonic next to a glass bowl
Complete beauty stack
How to Take

Simple enough to never skip.

1 capsule. 1 habit. Results that compound.

01
Take 1 capsule daily
1 capsule per day — simple. We recommend taking with a meal, but a glass of water is all you need.
02
Anytime that works for you
Morning with coffee, lunch, or evening — keratin isn’t time-sensitive. Daily consistency is everything.
03
Pair with your collagen
Add your Crushed Tonic collagen drink at the same time for the complete hair and skin ritual.
30 capsules per bottle 30-day supply No taste, no smell GMP certified Free from fillers and additives

Real hair. Real results.

#CrushedKeratin · tag us to be featured

↑ Replace with real customer content from Instagram and TikTok

Years of bleach and hot tools left my ends snapping off. Three months in, my hair is the thickest and glossiest it’s been since my twenties — and I’ve stopped finding it all over the floor.
MR
Marie R.
@marie.grows · 3 months
VERIFIED
I take these alongside the banana milk collagen every morning. My hair is thicker and my skin is glowing. I didn’t expect both from one routine — I’m obsessed.
JK
Ji-Yeon K.
@jiyeon.glow · 2 months
VERIFIED
I’ve never had such strong nails in my life. As someone who avoids animal products, finding something that works at the follicle level was a game-changer.
SL
Sofia L.
@sofia.wellness · 6 weeks
VERIFIED
From Our Founder

I built the collagen. Then I built what it couldn't do.

Collagen changed my skin - but it was never going to fix my hair. Hair isn't made of collagen. It's made of keratin. So I went looking for the missing half of the ritual: a keratin your body could actually absorb, sourced without slaughter.

This is that. Two capsules a day, no taste, no fuss - the follicle-level support collagen was never built to give.

Sally
Founder, Crushed Tonic

Got questions about keratin?

Hydrolyzed keratin is keratin protein that’s been broken down into smaller peptides — small enough to be absorbed through the gut lining into the bloodstream, where it can be transported to hair follicles and skin cells.

Our keratin is sustainably sourced from lamb wool — a byproduct of the wool industry. It is hydrolyzed, purified, and manufactured under strict quality standards, with no harm to animals.

Yes. Keratin is derived from lamb wool, not slaughter. It is often called “vegetarian collagen” and is suitable for vegetarians. It is not vegan.

Benefits begin showing in skin within 7 days and in hair from approximately day 14. Most users report thicker, stronger hair by day 30. Full results compound over 2–3 months of consistent daily use.

Absolutely — we recommend it. Collagen supports the dermal matrix while keratin supports the hair shaft and outer skin layer. Together they provide complete structural coverage, with no known interference.

Two capsules per day. We recommend taking with a meal but they can be taken with water alone. Each bottle contains 60 capsules — a 30-day supply.

Very different. Salon treatments coat the hair surface and wash out. Ingestible keratin travels through the bloodstream to the follicle and supports new growth from the root — structural, not cosmetic.

Always consult your healthcare provider before starting any new product during pregnancy or breastfeeding. Keratin is a natural protein, but professional guidance is always recommended.

Beautiful hair. Every morning.
New launches, science drops, and Sally's latest beauty rituals.
Keratin Hair Growth Booster Capsules
Keratin Hair Growth Booster Capsules
Subscribe and Save 10%
$55.00/mo
Add to Cart