The KilgourMD Prevention Serum
From the published KilgourMD trial — a Stanford-trained dermatologist’s 30-second nightly routine, formulated from actives backed by over 40 studies. 200,000 women now use it while staying on their GLP-1.
- 68% less shedding in just 6 weeks1
- 2× more hair growing2, up to 79% more density4
- 30 seconds — lightweight, never greasy
- No hormones, minoxidil, or side effects1
Choose Your Option Your 28% is held for 1:24:45
Your order is protected by a full money-back guarantee. If you don’t see less shedding and thicker, fuller hair within 90 days, we’ll refund every penny — no bottles to return, no questions asked.
200,000+ users · 1,400 doctors-
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3-Month Supply · $64 / month
You pay $192 upfront and we ship all 3 months together within 24 hours. Every 3 months, your next shipment renews automatically at the same $192 rate — the lowest price we offer. Save 28% vs. one-time pricing.
1-Month Supply · $75 / monthYou pay $75 and we ship a 30-day supply of the Prevention Serum within 24 hours. Every 30 days, your next bottle renews automatically at the same $75 rate. Save 15% vs. one-time pricing.
Cancel · Pause · RefundCancel or pause anytime — one click in your customer portal or a quick email. No phone calls. No “retention specialists.” No hoops. You hit cancel, it’s done. Refund hits your account within 3–5 business days. That’s it.
Both options include free priority shipping on every order, and access to Dr. Kilgour’s protocol support team if you have questions about your routine.
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You can cancel anytime, right from our website. No phone call, no waiting on support.
And there’s no password to remember. Just enter your email and we’ll send you a link to log in. Tap the link and you’re in.
Here’s how:
- Go to kilgourmd.com.
- Click “My Account” at the top right (next to the cart icon), or scroll to the bottom of the page and click “Manage Deliveries.”
- Enter the email you used for your order.
- Once you’re in, click cancel. Done.
Not sure which email you used? Open any order confirmation email from us. There’s a link inside that takes you straight to your account — every time, no login needed.
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Nothing in the Prevention Serum comes from animals — not a single ingredient — and nothing is ever tested on them.
It’s safe around them, too. Minoxidil is toxic to cats — and not just if they lick the bottle. Residue on your hands, your pillowcase, the towel you used — a cat that curls up where you slept and grooms itself can get enough to make it seriously ill, sometimes fatally. Neither serum carries any of that risk. You can keep them on the counter and never worry about your cat or dog.
Beauty and wellness should never come at a cost — to you, or to the animals you love.
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Marie Claire 2024 — Best Medical-Grade Scalp Solution
Winner of Marie Claire’s annual Beauty Awards — judged by editors and dermatologists. The “medical-grade” category specifically recognizes products with clinical backing.
Elite Lifestyle Magazine — Best Scalp Care Serums, 2024Winner of the 2024 ELITE Beauty Award for Best Scalp Care Serums in the Scalp Care & Hair Growth category. Elite’s panel tested products for months and selected winners based on quality, innovation, and how well they deliver on their promises. KilgourMD was the only scalp serum recognized for outperforming minoxidil in clinical trials — with no side effects.
FSA/HSA EligibleThis serum is FSA and HSA eligible — meaning you can use pre-tax health dollars to pay for it. Most hair growth products on the market can’t clear this bar. They’re classified as cosmetic. To qualify for FSA/HSA, a product has to meet a higher standard — it has to be positioned and classified as a health expense, not a beauty purchase.
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Free shipping on every order. Most orders ship same day and arrive within 3–5 business days.
If you’re not seeing results after 90 days of consistent use, we’ll refund you. No questions, no hassle, you don’t even need to send the bottle back.
Cancel or pause your deliveries anytime — no fees, no hoops. Just log into your account or email our team.
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One serum, one 30-second routine, once a day before bed. Apply the Prevention Serum — one dropperful to your scalp, parted in 2–3 sections, directly on the scalp (not your hair). Massage it in for 30 seconds and let it absorb.
Your scalp repairs itself during sleep. Blood flow increases, cell regeneration peaks. The serum works with that cycle overnight.
What The Trial Measured, Week By Week
Week 0
Where you are now
You lost the weight, and you’re paying for it with your hair11. That’s the trade you’ve been making. Here’s what the next sixteen weeks undo.
Weeks 1–4
It goes to work underneath
Nothing dramatic on the surface yet — this is the groundwork. Hair starts shifting back out of telogen and into anagen, and the follicles left empty behind each shed start getting fed again. Everything that shows later is being set up now.
Weeks 4–6
The shedding drops
This is when it shows on the surface. Far more of your hair is being held in the growing phase instead of let go — so there’s much less reaching the drain and the brush. Shedding down as much as 68% in the study1, wash day finally easing up.
Weeks 8–12
New hair comes through
The hair pulled back into anagen has been growing the whole time underneath — now it breaks the surface. Baby hairs along your part and at your temples, the ponytail beginning to feel like it has weight again. And you’re still on your GLP-1 the whole way through.
Weeks 12–16
Real density
Everything above compounds: less shedding, more growing, thicker strands — all landing at once. The thin spots fill back in and your part closes up. In its studies, Capixyl alone increased hair density by up to 79% versus untreated4.
GLP-1 Hair Recovery Stories From Our Customers ❤️
I debated sharing the “before” for a long time — it’s hard for me to look at. But if it stops one woman from waiting the way I did, fine.
Mine came from the GLP-1. I blamed myself for years, thought it was my protein, thought I was doing something wrong. It wasn’t. A few months in, my temples… started receding — the kind of thing you catch in a shop window and don’t recognize. I stopped wearing my hair back. For two years.
Biotin, collagen, two shampoos that promised everything. I thought the only way to stop it was to quit the medication, and I wasn’t willing to give up what it’s done for my health.
Second photo is four months in, still on my meds. The temples are filling back. Not all the way — I won’t pretend — but it’s coming back. I can pull my hair off my face again.
That’s my hairbrush. Both photos, same brush. Started Mounjaro last year, loved the weight loss, then the shedding hit and nobody warned me. Grey wad in the brush every wash. Lint roller in three rooms, not kidding.
Figured I had to choose — the meds or my hair.… Tried a supplement, more protein. Nothing.
Second brush is six weeks on the scalp serum. Stayed on my Mounjaro the whole time. Stood at the sink staring at an empty brush like a weirdo.
Okay I don’t normally do this but I have to share because I know so many of you are going through the exact same thing. That first photo is me and my husband in Paris a few years back — right before I started my shots. I’d been wanting to lose the weight for years, and it was finally happening. My hair? Thick, full. Didn’t think twice about it.
Then a few months into the GLP-1 it started…. The second photo is what I’d pull out of my hair in the shower — every single wash, a handful like that. And the worst part was the top of my head, you can see in the photo how you could see right through to my scalp at the part. I stopped parting it in the middle. I started wearing it up so people wouldn’t notice from above. I cried in the car more than once.
I honestly thought about quitting the medication over it — but I’d worked so hard for the weight. I tried a few things — a couple of shampoos everyone swears by, more protein, a supplement my sister sent me. Nothing touched it. I genuinely thought I had to pick: my weight or my hair.
The third photo is me last week. I’ve been using the prevention serum (the scalp one) every night, takes me 30 seconds, and I never came off my medication. The shedding stopped first — that was the thing that made me cry happy tears, not finding it all over the shower anymore. And then it just slowly came back. My part filled in. It feels like MY hair again.
I’m 57. If you’re sitting there thinking you have to choose between your weight loss and your hair — that’s exactly what I thought. You don’t. Please don’t wait as long as I did. 💛
Visible Results In 90 Days Or Your Money Back
Use KilgourMD Prevention every night for 90 days. Don’t see less shedding and a fuller ponytail? You get every dollar back. Less than 3% of our customers ever claim it.
Trusted By The ExpertsDermatologists. Dietitians.
Over 200,000 Women. They
all trust KilgourMD.
Dr. James Kilgour
Stanford-Trained, Board-Certified Dermatologist · Founder of KilgourMD
“My own mother was on a GLP-1 for her health and couldn’t come off it — and it was taking her hair. Nobody had built anything for that. So I did, then I ran the trial, counted every strand, and published it.”
Jennifer Hanway
Holistic Nutritionist · Advisor to L’Oréal & Johnson & Johnson
“Most women treat their hair. The ones who get it back treat what the GLP-1 actually did to their scalp. In 19 years I’ve not seen another study count every strand by hand — with zero side effects. KilgourMD is the only protocol I recommend for it.”
Ilyse Schapiro, MS, RD, CDN
Registered Dietitian · 20 Years in Practice
“Almost every GLP-1 client I see now asks me about her hair, and she’s been told to eat more protein. I’m a dietitian and I’ll say it plainly: this isn’t a food problem. Protein won’t move a follicle that’s stopped growing.”
Alyssa Nishihira, PA-C
Hair Restoration Specialist
“Women come to me ready to quit their medication over their hair. That’s the wrong trade — you give back the weight and the hair still doesn’t come back on its own. Treat the scalp and you keep both.”
Dr. Manhong Ma, MD
Dermatology · 34 years
“I like this for thinning or slower regrowth from aging or hormonal shifts. Give it 3 to 6 months, since hair grows on a months-long cycle. It protects the follicle and reduces shedding, with botanicals to support hair in the growth phase.”
Dr. Adeeba Akhtar, MD
Primary care · 21 years
“It combines actives across the full growth cycle: Capixyl reinforces its attachment to the scalp, and Procapil nourishes the root so fewer hairs fall. For anyone noticing thinning or hair loss, I’d strongly recommend it.”
Matched Against The ResearchWhy What You’ve Tried Hasn’t Worked
On a GLP-1, your hair is being pushed out of the growing phase and into shedding11 13 — and nothing moves it back while you’re still on it. Here’s why the usual fixes were never going to touch that.
The claim: Feed your hair the vitamins it’s missing and it grows back stronger.
The truth: Biotin only does anything if you’re actually low on it — and almost no one is. Your hair isn’t falling because it’s underfed. It’s falling because your GLP-1 pushed it out of the growing phase, and a vitamin can’t change that. When researchers tested biotin against a dummy pill, both groups grew the same amount of hair — no difference. The skin doctors’ own board says plainly it shouldn’t be used for hair loss.
Journal of Clinical & Aesthetic Dermatology, 2024; American Academy of Dermatology.
The claim: The one FDA-approved drug for women’s hair loss — rub it in and regrow.
The truth: Most women never respond to it. Minoxidil doesn’t work until an enzyme in your scalp switches it on — and about half of women don’t have enough of that enzyme, so it stays inactive no matter how much you use. In a head-to-head trial, it worked for 25.5% of women. It also works by forcing blood to the scalp, and your follicles were never short on blood — they were pushed out of the growing phase, which is a different problem. And the moment you stop, it all sheds back within months. You’re on it twice a day, every day, for life, just to hold the line — on top of the medication you’re already taking.
British Journal of Dermatology; head-to-head trial, 25.5% response rate in women.
The claim: Drink your collagen and rebuild the foundation your hair grows from.
The truth: Your hair is made of keratin, not collagen — and your body digests the powder long before any of it could reach your scalp. The Cleveland Clinic says there’s no strong evidence collagen grows hair in people; the hopeful results come from cells in a dish and mice, not women. The few human studies mixed collagen in with a pile of other vitamins, so there’s no way to say the collagen did anything. It helps skin and nails. Not this.
Cleveland Clinic; human studies (Arias 2022; Milani & Colombo 2023) used mixed formulas.
The claim: Target the root causes of thinning from the inside out.
The truth: The doctors who actually treat hair have looked at these and come up empty. A major review in the Journal of the American Academy of Dermatology concluded there simply isn’t enough evidence to recommend the vitamins and minerals these are built on. And underneath that: your loss is at the scalp, and a pill has to cross your whole body and hope a trace reaches a single follicle. On a GLP-1, that’s an even longer trip13 — you’re eating less and absorbing differently than you were.
Journal of the American Academy of Dermatology (review of biotin, zinc, and other hair supplements).
The KilgourMD Prevention Serum
From the published KilgourMD trial — a Stanford-trained dermatologist’s 30-second nightly routine, formulated from actives backed by over 40 studies. 200,000 women now use it while staying on their GLP-1.
- 68% less shedding in just 6 weeks1
- 2× more hair growing2, up to 79% more density4
- 30 seconds — lightweight, never greasy
- No hormones, minoxidil, or side effects1
Choose Your Option Your 28% is held for 1:24:45
Your order is protected by a full money-back guarantee. If you don’t see less shedding and thicker, fuller hair within 90 days, we’ll refund every penny — no bottles to return, no questions asked.
-
-
3-Month Supply · $64 / month
You pay $192 upfront and we ship all 3 months together within 24 hours. Every 3 months, your next shipment renews automatically at the same $192 rate — the lowest price we offer. Save 28% vs. one-time pricing.
1-Month Supply · $75 / monthYou pay $75 and we ship a 30-day supply of the Prevention Serum within 24 hours. Every 30 days, your next bottle renews automatically at the same $75 rate. Save 15% vs. one-time pricing.
Cancel · Pause · RefundCancel or pause anytime — one click in your customer portal or a quick email. No phone calls. No “retention specialists.” No hoops. You hit cancel, it’s done. Refund hits your account within 3–5 business days. That’s it.
Both options include free priority shipping on every order, and access to Dr. Kilgour’s protocol support team if you have questions about your routine.
-
You can cancel anytime, right from our website. No phone call, no waiting on support.
And there’s no password to remember. Just enter your email and we’ll send you a link to log in. Tap the link and you’re in.
Here’s how:
- Go to kilgourmd.com.
- Click “My Account” at the top right (next to the cart icon), or scroll to the bottom of the page and click “Manage Deliveries.”
- Enter the email you used for your order.
- Once you’re in, click cancel. Done.
Not sure which email you used? Open any order confirmation email from us. There’s a link inside that takes you straight to your account — every time, no login needed.
-
Nothing in the Prevention Serum comes from animals — not a single ingredient — and nothing is ever tested on them.
It’s safe around them, too. Minoxidil is toxic to cats — and not just if they lick the bottle. Residue on your hands, your pillowcase, the towel you used — a cat that curls up where you slept and grooms itself can get enough to make it seriously ill, sometimes fatally. Neither serum carries any of that risk. You can keep them on the counter and never worry about your cat or dog.
Beauty and wellness should never come at a cost — to you, or to the animals you love.
-
Marie Claire 2024 — Best Medical-Grade Scalp Solution
Winner of Marie Claire’s annual Beauty Awards — judged by editors and dermatologists. The “medical-grade” category specifically recognizes products with clinical backing.
Elite Lifestyle Magazine — Best Scalp Care Serums, 2024Winner of the 2024 ELITE Beauty Award for Best Scalp Care Serums in the Scalp Care & Hair Growth category. Elite’s panel tested products for months and selected winners based on quality, innovation, and how well they deliver on their promises. KilgourMD was the only scalp serum recognized for outperforming minoxidil in clinical trials — with no side effects.
FSA/HSA EligibleThis serum is FSA and HSA eligible — meaning you can use pre-tax health dollars to pay for it. Most hair growth products on the market can’t clear this bar. They’re classified as cosmetic. To qualify for FSA/HSA, a product has to meet a higher standard — it has to be positioned and classified as a health expense, not a beauty purchase.
-
Free shipping on every order. Most orders ship same day and arrive within 3–5 business days.
If you’re not seeing results after 90 days of consistent use, we’ll refund you. No questions, no hassle, you don’t even need to send the bottle back.
Cancel or pause your deliveries anytime — no fees, no hoops. Just log into your account or email our team.
-
One serum, one 30-second routine, once a day before bed. Apply the Prevention Serum — one dropperful to your scalp, parted in 2–3 sections, directly on the scalp (not your hair). Massage it in for 30 seconds and let it absorb.
Your scalp repairs itself during sleep. Blood flow increases, cell regeneration peaks. The serum works with that cycle overnight.
Frequently Asked Questions
A Note From Dr. Kilgour
“My mother lost her hair through menopause. I built her a serum for it, and it grew back — so she stopped using it. Why wouldn’t she.
Then she went on a GLP-1 for her health, and like most women, nobody warned her the hair loss could come back. It did. But she knew what to do this time — she started again straight away, and it came back fast.
That’s the whole difference. She didn’t wait. She’s still on her medication, and she still has her hair.
Here’s my promise. Use it every night for 90 days. If your shedding hasn’t visibly slowed and you’re not seeing new growth come in, one email and you get every penny back. Keep the bottles. No forms, no questions.
I’ve watched it work for over 200,000 women — starting with her. Fewer than 3% ever ask for a refund.
The real risk isn’t the serum. It’s another year of thinking you have to choose between your health and your hair. You don’t. She didn’t.”
Founded by Dr. James Kilgour, MD — board-certified dermatologist, Fellow of the American Academy of Dermatology, Stanford School of Medicine.
Our trial is published in the Journal of Drugs in Dermatology. Every strand was counted by hand by Dermaclaim, an independent lab. Density was graded by two board-certified dermatologists with no involvement in the study.
More than a thousand US clinicians supply KilgourMD to their own patients. More than 200,000 women use it.
Phone: +1 (844) 889-5348
Email: hello@kilgourmd.com
Mailing Address: 300 Delaware Ave, Ste 210, Wilmington, DE 19801, United States
Enter your email and your 10% off unlocks right here. It stacks on any active discount.
Authentic KilgourMD products are not sold on Amazon or other websites.
1. Kilgour J, et al. Journal of Drugs in Dermatology, 2026. Wash-test shed count and Ludwig-scale density; independent lab (Dermaclaim); density graded by two independent board-certified dermatologists.
2. AnaGain™ — Mibelle Biochemistry.
3. Procapil® — Sederma.
4. Capixyl™ — Lucas Meyer Cosmetics.
5. RootBioTec™ — Mibelle Biochemistry.
6. L-Ascorbic Acid — Antioxidants, 2022 (ascorbic acid and dermal collagen synthesis); International Journal of Cosmetic Science, 2021 (oxidative stress and the scalp).
7. Yelich A, et al. Journal of Clinical and Aesthetic Dermatology, 2024; American Academy of Dermatology position on biotin.
8. Karaca N & Akpolat ND, 2019 — comparative trial, 5% minoxidil vs. Redensyl/Capixyl/Procapil combination. Minoxidil response: McCoy J, Goren A, et al. J Biol Regul Homeost Agents, 2016;30(4):1153–1155, PMID 28078868; Jimenez-Cauhe J, et al. J Cosmet Dermatol, 2024, DOI 10.1111/jocd.16473.
9. Cleveland Clinic; human studies (Arias 2022; Milani & Colombo 2023).
10. Journal of the American Academy of Dermatology — review of vitamins and minerals in hair supplements.
11. Vidal SI, Akiska YM, et al. “Increased risk of hair loss with GLP-1 receptor agonists: a real-world multicenter TriNetX cohort study.” JAAD International, 2026;25:133–135. DOI 10.1016/j.jdin.2026.01.014. Retrospective cohort, 547,993 matched patients.
12. Burke O, Sa B, Cespedes DA, Sechi A, Tosti A. Journal of the American Academy of Dermatology, 2025;92(5):1141–1143.
13. Branyiczky MK, et al. “Effects of GLP-1 receptor agonists on hair loss and regrowth: a systematic review.” International Journal of Dermatology, 2026. DOI 10.1111/ijd.70133.
Individual results vary and are not guaranteed. Images may include clinical trial photography, unretouched customer photos, and other visual examples; before-and-after photos show individual experiences and are not a guarantee of results.
© 2026 KilgourMD. Statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is for educational purposes and is not individual medical advice; consult your doctor before use.
Your 28% is held for 1:24:45 · 90-day guarantee