GLP-1 & your hair
Best Shampoo for GLP-1 Hair Loss? 4 Scalp Products and 1 Softgel, Ranked
On the shot or about to start? We checked 2 shampoo kits, a serum, an oil and a softgel for the thinning on top.
- A shampoo rinses off in a minute or two. It can clean your scalp and make thin hair look fuller.
- Thinning on top starts inside the root, where a shampoo can't reach. Shedding all over, around month 3, is different. It settles by itself.
- 4 scalp products and 1 softgel, checked on the same 5 points. Only one gets all 5 right.
A good shampoo keeps your scalp clean and can make thin hair look fuller. It rinses off in a minute, so it can't do much at the root.
The thinning on top comes from DHT, a hormone that shrinks the roots. The softgel ranked first works on DHT from the inside.
The drain looked worse every week, so you bought a better shampoo. Almost everyone does.
Not on the shot yet? A new shampoo can feel like a good way to get ready.
Each bottle in the shower does something for your hair. What matters is what it does at the root.
Why it happensWhat's going on
Two things can happen to your hair on the shot. The first is shedding, hair falling out all over your head. It settles by itself.
The second is thinning on top. That one doesn't settle by itself.
Your body makes two hormones that matter for the hair on top. Estrogen is one. Every woman makes it, and one of its jobs is guarding the hair roots.
The other is DHT. Your body makes it from testosterone. Women make a little of that too. DHT shrinks the hair roots on top, so each new hair comes in thinner.
The two pull against each other. While estrogen is up, DHT loses. When estrogen drops, DHT wins on top.
On a GLP-1, that happens in three steps.
- 1Estrogen guards the top
It keeps DHT away from the roots on top.
- 2The shot takes fat fast
Part of your estrogen is made in fat, so it drops too.
- 3The top thins, the back doesn't
DHT reaches the roots on top, and each new hair grows in thinner.
How it startsHow you got here
The shedding often starts around month 3. More hair in the drain, more in the brush.
So you head to the shampoo aisle. It's the one thing you can do today.
A thickening shampoo first. Then a scalp serum, then rosemary oil.
Your hair may feel softer and less dry. But the part in your hair can still look wider.
Now even using a special shampoo to prevent hair loss. Nothing is stopping the hair falling out in chunks.
A woman on the shot, on Reddit
Those bottles were made for the hair you can see, not for the root.
The checksThe 5 things that matter
A hair product can do two different jobs. It can care for the hair, or it can guard the root from DHT.
Scientists have studied two plants for slowing DHT. Pumpkin seed oil is pressed from pumpkin seeds. Saw palmetto is the berry of a small palm tree.
Five things to look for
Here's what to look for on the back of the bottle.
- Made for women. It's made for women losing hair on top, not all hair types.
- Slows DHT. It has pumpkin seed oil and saw palmetto.
- Every amount printed. There's a number next to each ingredient. No blend.
- Stays on. It stays on your scalp, or you swallow it. A shampoo rinses off in a minute.
- One easy step. Hair takes about 12 weeks to show a change. One product once a day is easy to keep up.
We checked every product below on these same five things.
The ranking4 scalp products and 1 softgel, worst to best
Women on the shot ask most about these four: two shampoo kits, a serum and an oil. We added number one, a softgel, and checked all five.
✓ Gets it right · ✕ Problem · ! Okay, not ideal
Nioxin System 2 Kit
Shampoo, conditioner and a leave-on step, every day
Gets 1 of 5 right- Made for Thinning hair, not colored or permed
- Slows DHT No saw palmetto, no pumpkin seed oil
- Every amount printed No amounts printed
- Stays on Step 3 stays on the scalp
- One easy step Three steps, every day
- Price About $57 for the kit
Verdict. It can make thin hair look fuller, and step 3 stays on. But it's three steps every day, it prints no amounts, and neither plant is in it.
BondiBoost HG GLP-1 Companion
Shampoo, conditioner, mask and scalp drops
Gets 1 of 5 right- Made for Anyone on a GLP-1
- Slows DHT Saw palmetto, no amount. No pumpkin seed oil.
- Every amount printed Two amounts printed, not the saw palmetto
- Stays on Scalp drops stay on, daily
- One easy step Four products, drops every day
- Price $92 for the kit
Verdict. The one kit here sold for people on a GLP-1, and its scalp drops stay on. But it's four products, and there's no amount printed for the saw palmetto.
Mielle Rosemary Mint Scalp & Hair Strengthening Oil
Rub a little into the scalp
Gets 2 of 5 right- Made for Dry scalp and split ends
- Slows DHT No saw palmetto, no pumpkin seed oil
- Every amount printed No amounts printed
- Stays on Rub it in, leave it in
- One easy step One bottle, one step
- Price About $10 a bottle
Verdict. The cheapest one here, and good for a dry scalp. No amounts are printed, and neither plant is in it.
Divi Scalp Serum
A dropper on the scalp, once a day
Gets 2 of 5 right- Made for Thin-looking hair, all hair types
- Slows DHT No saw palmetto, no pumpkin seed oil
- Every amount printed Ingredients listed, no amounts
- Stays on Leave-on drops, no rinse
- One easy step Once a day, one step
- Price $48 a bottle
Verdict. The easiest of the four scalp products: drops once a day, and they stay on. It prints no amounts, and neither plant is in it.
HALO Hair
2 softgels a day
Gets 5 of 5 right- Made for Women losing hair on top
- Slows DHT 1,000 mg pumpkin seed oil, 320 mg saw palmetto
- Every amount printed Every dose on the label, no blend
- Stays on Swallowed, nothing rinses off
- One easy step 2 softgels a day, done
- Price $20 a bottle, more than the rosemary oil
Verdict. The only one here that gets all five right. You swallow it, so nothing rinses off, and both plant amounts are printed. Start it with your first shot, or today if you're already on one.
Prices and labels checked September 2026.
Get number one, buy 2 get 1 free →Number oneWhat's inside number one, and how it works
| Ingredient | Per day | What it does |
|---|---|---|
| Pumpkin seed oil, cold-pressed | 1,000 mg | Slows the switch at the root that makes DHT |
| Saw palmetto extract | 320 mg | Slows the same switch, a second way |
| Zinc | 10 mg | A mineral hair roots use to grow |
| Selenium | 55 mcg | A mineral that helps protect cells |
| Copper | 1 mg | A mineral hair uses for its color |
| Vitamin E | 50 mg | Helps protect cells from everyday wear |
| Biotin | 100 mcg | Low on purpose, so blood tests stay accurate |
| Iodine | None | Left out on purpose |
Every dose is printed on the label. No blend.
How it works
Estrogen helps guard the top from DHT. On the shot, estrogen drops along with the fat.
Women make a little testosterone too. At the root, a natural switch called an enzyme turns some of it into DHT.
Both plants slow that switch, right at the root. So less DHT gets made.
Each plant does this in its own way. No prescription needed.
That's the big difference from a shampoo. You swallow a softgel, so it works from the inside and nothing rinses it off.
Where it comes from
Pumpkin seed oil is pressed cold from the seeds, like a good olive oil. Saw palmetto is the berry of a small palm tree that grows wild in Florida.
Some shampoos have these plants too. But they rinse off with the suds, and no amount is printed.
What the research says
There's one small study, in men. They took 400 mg of pumpkin seed oil a day for 24 weeks.
At the end, their hair count was up about 40%. There's no study in women.
Number one has 1,000 mg of the oil in every daily dose.
What makes it different
No other product here has 1,000 mg of cold-pressed pumpkin seed oil. It adds 320 mg of saw palmetto.
Biotin is kept low, at 100 mcg, and there's no iodine. So your blood tests stay accurate.
It's made for women losing hair on top, on the shot or about to start.
See the full label →Your turnNow check yours
Got a bottle in your shower? Check the back for the same five things.
- Is it made for women losing hair on top?
- Are pumpkin seed oil and saw palmetto both on it?
- Is there a number next to every ingredient?
- Does it stay on, or rinse off in a minute?
- Is it one easy step, once a day?
Count how many it gets right.
If it gets one or two, that's not a mistake you made. You picked it off the same shelf everyone does.
See the one that gets all five →
What number one costs
Buy once, or subscribe and save from $24.99. Free US shipping on 3 or more. 90-day money back.
What women ask about shampoo and GLP-1 hair loss
Does shampoo help GLP-1 hair loss?
A good shampoo keeps your scalp clean and can make thin hair look fuller. It rinses off before it can slow DHT at the root. Still shedding 6 to 9 months after your weight is steady? See your doctor.
Is there a shampoo made for GLP-1 hair loss?
Yes, one. BondiBoost sells a kit for people on a GLP-1. It's four products, with some saw palmetto but no amount printed.
What about Nizoral, the ketoconazole shampoo?
It's a dandruff shampoo. The box says it controls flaking, scaling and itching. If your scalp itches or flakes, it's worth having.
Can I keep my shampoo and add number one?
Yes. They do different jobs. Nothing in number one is a drug. Still, show the label to your pharmacist first, especially if you take hormones, the pill or a blood thinner.
I haven't started the shot yet. Can I get ahead of it?
Shedding usually shows up around month 3. Eat protein at every meal, and ask your doctor to check your iron and thyroid. If you want number one, start it with your first shot. Then you're 12 weeks in by month 3.
Or you close this page. That's allowed.
Nothing happens. You keep your shampoo, the shedding settles, and you keep an eye on the part in your hair.
You know the five things now. Next time you're in the shampoo aisle, check the back of the bottle first.
Get number one, buy 2 get 1 free →© 2026 HALO Health. All rights reserved.