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Physician
Formulated
Created by a board-certified
endocrinologist for their own patients.

One routine. 17 actives.
Everything thinning hair actually needs.

One routine replaces a shelf of hair supplements and serums. Formulated by a board-certified endocrinologist with decades of experience and over 100,000 patient visits. Backed by published research on every active. Designed for the everyday causes of thinning — stress, hormones, postpartum, and age.

★★★★★ 4.9 · Customer Rating
The Complete System — gummy and serum
The Complete
System
Shop the routine →
 Man checking his hairline in the mirror
Find what's driving
your thinning
Take the quiz →
Hair, Skin & Nails Gummies
From $37/mo
Gummies›
Hair Serum
From $28/mo
Serum›
90-Day Guarantee
Free Shipping
3rd-Party Tested
WHO IT'S FOR

Thinning has more than one cause.

Perimenopause & hormonal shifts

Estrogen falls, and the same follicles are asked to do more with less.

Postpartum recovery

The reserves pregnancy and nursing drew down show up in the brush months later.

Stress-related shedding

Cortisol pushes more follicles into the shedding phase at once.

GLP-1 / rapid weight loss

Eating less leaves a nutrient gap the follicle feels before the mirror does.

Nutrient gaps

The cofactors hair runs on are the first to run short.

Age-related thinning

Strands get finer and slower to replace over time.
Take a Personalized Quiz to Find Your Root Causes
THE ROUTINE

Two products. One routine.

Support from within and at the scalp — the two directions thinning actually comes from.
Gummies
FROM WITHIN
Hair, Skin & Nails Gummies
Biotin, collagen & 11 research-backed actives, from the inside.
From $37/mo30% OFF
= $1.24 / day
✓ Hair, skin & nails support — from the inside out
✓ 90-day money-back guarantee
✓ Physician-formulated
✓ Replaces $300+/year in hair vitamins — for $1.24 a day
SHOP THE GUMMY
Serum
AT THE SCALP
Hair Serum
A dual-peptide leave-on topical, where hair actually grows.
From $28/mo30% OFF
= $0.93 / day
✓ Targets the scalp, where hair actually grows
✓ 90-day money-back guarantee
✓ Physician-formulated
✓ Replaces $250+/year in scalp serums — for $0.93 a day
SHOP THE SERUM
★ BEST VALUE — THE FULL ROUTINE
The Complete System
COMPLETE SET
The Complete System
Both products, one subscription — the full two-direction routine.
From $63/mo30% OFF
= $2.10 / day
✓ The complete two-direction routine — within + scalp
✓ 90-day money-back guarantee
✓ Physician-formulated · free shipping
✓ Replaces $600+/year in hair supplements — for $2.10 a day
SHOP THE SYSTEM
WHAT IT SUPPORTS

One routine. Hair, skin, nails & scalp.

17 research-backed actives, working in two directions — from within and at the scalp.

Hair

Biotin, collagen peptides, zinc, plus the dual-peptide serum (GHK-Cu, Acetyl Tetrapeptide-3) at the scalp.

Supports the appearance of fuller, stronger, healthier-looking hair — from within and where it grows.

Skin

Collagen peptides, vitamin C, MSM, vitamin E.

Supports skin elasticity and a smoother, healthy-looking complexion.

Nails

Biotin, L-cysteine, zinc, selenium.

Supports stronger, more resilient nails.

Scalp

GHK-Cu (copper peptide), caffeine, rosemary, Bacillus & Saccharomyces ferments.

Supports a healthy scalp and follicle environment.

17 research-backed actives across hair, skin, nails & scalp — in one daily routine.

BEHIND THE FORMULA

Formulated by the doctor, not the marketing team.

Dr. Renanit Barron, MD
A NOTE FROM DR. RENANIT BARRON
"I've spent my career treating the hormonal systems behind hair density — thyroid, cortisol, estrogen, testosterone. After years of seeing thinning hair as a downstream symptom, I formulated the routine I wanted to give my own patients."
Dr. Renanit Barron, MD
Board-Certified Endocrinologist · Founder
100k+patient visits
2003est. practice
20+years
HEAR FROM THE FORMULATOR
VERIFIED REVIEWS

What people are noticing.

★★★★★4.9Verified buyers
★★★★★

Transparency you can actually see.

"Most gummies hide behind proprietary blends. I liked that every ingredient and dose is clearly listed, and the formula feels intentional."

Rachel R.Verified buyer
★★★★★

Finally replaced my whole supplement shelf.

"I was tired of juggling powders and capsules every morning. These made everything simpler — the first I've stayed consistent with."

Suki S.Verified buyer
★★★★★

A serum that doesn't feel greasy.

"Every serum before weighed my hair down or made my scalp oily. This absorbs fast, feels lightweight, fits my routine."

Trent J.Verified buyer
★★★★★

My scalp feels healthier overall.

"I bought it for thinning at my hairline, but first thing I noticed was my scalp feeling calmer and less irritated."

Daniel K.Verified buyer
★★★★★

The formula was actually thought through.

"Peptides, rosemary, caffeine, postbiotics — all clearly listed instead of hidden behind a blend."

Arielle T.Verified buyer
★★★★★

They actually feel premium.

"The ingredients feel thoughtfully chosen, the taste is great, the whole experience feels higher quality."

Michelle L.Verified buyer
WHAT TO EXPECT

Hair works on a 90-day cycle. We built the routine around it.

Month 1–3

Foundation

The actives build up as your current hair cycle completes. Many people notice changes in shedding and texture first.

Month 3–6

Momentum

New growth from supported follicles starts becoming visible — this is when fullness and volume changes typically appear.

Month 6+

Maintain

Hair health is ongoing. Staying consistent supports the results you've built.

Individual results vary. That's why the Quarterly plan is backed by a 90-day money-back guarantee — a full hair cycle, risk-free.

REAL SCIENCE

What the ingredient research shows.

80%
Increase in hair thickness
89%
Reduction in inflammatory scalp bacteria
65%
Increase in hair-structure collagen
Results from peer-reviewed clinical studies on individual active ingredients (MSM, 120-day study; Saccharomyces ferment, 28-day; Acetyl Tetrapeptide-3 & Copper Tripeptide-1, cellular studies). Individual results may vary.
Clinical Comparison

The New Gold Standard

See how DR BARRON compares on clinical dosing and ingredient transparency — every active, every dose, side by side.

Active
DR BARRON DR BARRON
Leading hair gummy
Biotin
10,000 mcg+250% More
2,800 mcg
Zinc
5 mg+65% More
3 mg
Vitamin C
30 mg+25% More
24 mg
Vitamin D
35 mcg+25% More
28 mcg
Collagen peptides
350 mg
Rarely included
Selenium
25 mcg
Rarely included
Bamboo silica
15 mg
Not included
MSM
50 mg
Not included
Pumpkin seed extract
50 mg
Not included
L-Cysteine
10 mg
Not included
Vitamin E
6 mg
Usually included
Every dose printed on the label — no proprietary blends.Compared to 6 best-selling hair gummies, 2026.
A couple doing the two-direction routine — gummy and serum

From within. At the scalp.
The complete routine.

Shop the Complete System →
OUR PROMISE

Risk-free.

See it, or get your money back.

90DAY
Guarantee · Quarterly Plan

Give the routine a full hair cycle. If you don't see fuller, healthier-looking hair, we'll refund you — opened or not, no return required.

90-Day Guarantee (Quarterly) 30-Day Guarantee (Monthly) Free Shipping on Subscriptions Cancel Anytime Third-Party Tested

The smarter way to invest in your hair.

One routine replaces a shelf of single-ingredient supplements and topicals — at a fraction of the monthly cost.

What it replaces
DR BARRON
Cost per month
Bovine collagen peptides
$35
High-dose biotin
$14
Multivitamin
$24
Vitamin D3
$12
Zinc
$10
Vitamin C
$10
MSM
$18
Pumpkin seed extract
$20
Vitamin E
$10
L-Cysteine
$18
Selenium
$10
Peptide scalp serum
$45
Total per month
$63
$226

Prices based on average retail cost of individually branded supplements and topicals at comparable doses (Amazon, iHerb, brand direct — 2026). Items commonly stacked in hair-care routines, not direct mechanistic equivalents. The Complete System price reflects the Quarterly (90-day) subscription rate.

Shop the Complete System
QUESTIONS

The short answers.

Hair works on a roughly 90-day cycle, so we ask for 90 days. Most people notice shedding and texture changes first, in the opening weeks; visible fullness typically follows between months 3 and 6. That's also why the Quarterly plan carries a full 90-day money-back guarantee.

Two ways. Every dose is printed on the label — no proprietary blends — and the routine works in two directions: the gummy supports from within while the serum works at the scalp, where hair actually grows. A drugstore vitamin is a pill only.

It's built for thinning from common, non-genetic causes — stress, postpartum, perimenopause, nutrient gaps, GLP-1 weight loss, age. It is NOT built for genetic pattern loss or alopecia — that needs a dermatologist, and we'll tell you so. The 2-minute quiz will tell you which group you're in.

The routine is drug-free, but if you take prescriptions, are pregnant, or are nursing, check with your physician first — your doctor knows your full picture.

Choose Quarterly (best price, 90-day supply, 90-day guarantee) or Monthly (30-day guarantee). Both auto-renew, ship free, and can be paused or canceled anytime from your account — no calls, no hoops.

Then it's free. Quarterly orders carry a 90-day money-back guarantee — opened or not, no return required. Email us and we refund you.

Fuller hair starts with the right routine.

Physician-formulated, every dose on the label, backed by a 90-day money-back guarantee.

Shop the routine Take the quiz