GLP-1 & your hair
Will GLP-1 Hair Loss Grow Back? Usually. Here's How to Tell If Yours Will
On the shot or about to start? A hand mirror shows if it's shedding or thinning on top. Plus 5 things women try.
- Shedding is extra hair falling out after fast weight loss. That hair usually grows back once your weight holds steady.
- Thinning only on top, with the back still thick, is a different kind. It doesn’t settle by itself.
- A hand mirror shows which one you have. Look at the top, then the back.
- 5 things women try for it, checked on the same 5 points. One gets all 5 right.
Usually, yes. Shedding settles a few months after your weight holds steady. Then the hair fills back in.
Thinning only on top, while the back stays thick, is a different kind. That one doesn't settle by itself.
A hand mirror shows which one you have. For thinning on top, see number one in the ranking below.
When your hair starts coming out on a GLP-1, you want to know if it will grow back.
Hair you lose to shedding usually grows back. Thinning on top doesn’t settle by itself. It helps to know which one you’re seeing.
On the shot now? The difference is easy to see once you know where to look. About to start? You'll know what to watch for.
What's going on
Fast weight loss makes lots of hair fall out at once, all over. That's shedding, and it ends by itself.
Thinning on top has a different cause. It comes down to two hormones.
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, which women make a little of 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 from shrinking the roots on top.
- 2The shot takes fat fast
Part of your estrogen is made in fat, so less fat means less estrogen.
- 3The top thins. The back doesn't.
DHT reaches the roots on top, and each new hair grows in thinner.
How you got here
The shot worked. The scale finally moved, maybe faster than you hoped.
Then, around month 3 or 4, the brush filled up. There were clumps in the shower, and your ponytail felt thinner.
Everyone had advice. Eat more protein, take biotin, wait it out.
Most of that is true. But nobody said how to tell if what you're seeing is only shedding.
How will I know if it's not the 'usually reversible' type?
A comment under a GLP-1 hair video
How to tellThe mirror test
- Where it shows. Shedding thins your hair all over. Thinning on top shows at your part and the crown of your head.
- The back of your head. Hold up a hand mirror. If the back is thick and the top is thinner, that's thinning on top.
- How it comes out. Shedding comes out in handfuls, then slows down. Thinning on top is slow. Your part just gets a little wider over time.
- How it feels. Frizzy or dry hair is common on the shot. That's the hair itself. Thinning on top starts down at the root.
The two kinds can happen at the same time. Sometimes heavy shedding makes thinning on top easier to see. The thinning may have started earlier, before you noticed.
Still shedding 6 to 9 months after your weight holds steady? See your doctor, and ask about iron, thyroid and vitamin D.
About to start? Take a photo of your part now, in daylight. That's the before picture you'll want later.
The 5 things that matter
What to look for
Here’s what to look for on the back of the bottle.
- Made for women. It says women on the front, not just hair, skin and nails.
- The DHT job. It has pumpkin seed oil and saw palmetto, with the amounts. Saw palmetto is a palm berry. Both plants have been studied for slowing DHT.
- Form and dose. Two a day or less. Each ingredient shows its own amount, not one total for a “blend.”
- Easy on blood tests. Biotin under 1,000 mcg and no iodine, so your blood tests stay accurate.
- 12 weeks, fair price. Hair needs about 12 weeks to show a change. Those 12 weeks should cost about $60 or less.
We checked every product below on these same five things.
The ranking5 things women try, worst to best
Women on the shot reach for these while they wait for their hair to grow back. We checked each one on the same five things, straight off the back label.
✓ Gets it right · ✕ Problem · ! Okay, not ideal
Nature's Bounty Biotin 10,000 mcg
1 softgel a day
Gets 2 of 5 right- Made for Hair, skin and nails, for anyone
- The DHT job Biotin only, nothing for DHT
- Form and dose 1 softgel, amount printed
- Blood tests 10,000 mcg of biotin a day
- 12 weeks About $8, one bottle lasts 4 months
- Price About $8 a bottle
"I was taking Biotin for a bit but that did nothing"
From a GLP-1 thread on RedditVerdict. The cheapest bottle in the aisle, and the first one most women grab. Nothing in it slows DHT. And that much biotin can throw off a thyroid test.
Mielle Rosemary Mint Scalp & Hair Strengthening Oil
A rub-on scalp oil
Gets 2 of 5 right- Made for Any hair type
- The DHT job Rosemary and mint, no amounts
- Form and dose Rub-on oil, no dose printed
- Blood tests Nothing you swallow
- 12 weeks Cheap enough to try
- Price $9.99 a bottle
Verdict. It smells good and feels nice on your scalp, for ten dollars. But there's no dose on the label, and nothing for DHT.
Viviscal Women's Hair Growth Supplement
2 tablets a day
Gets 2 of 5 right- Made for Women
- The DHT job No saw palmetto, no pumpkin seed oil
- Form and dose 2 tablets, one total for its blend
- Blood tests Biotin 240 mcg, no iodine
- 12 weeks About $120
- Price About $40 a month
Verdict. Made for women and easy on blood tests. It feeds the hair while you eat less. Nothing in it goes after DHT.
Women's Rogaine Minoxidil Foam
A foam you rub on the scalp, once a day
Gets 3 of 5 right- Made for Women
- The DHT job Nothing on the label for DHT
- Form and dose A daily foam you have to keep using
- Blood tests Nothing you swallow
- 12 weeks One 4-month pack covers it
- Price Under $15 a month
Verdict. Cheap, and it helps a lot of women. But it does nothing about DHT. If you stop using it, the label says the hair loss begins again. Some women also get facial hair.
HALO Hair
2 softgels a day
Gets 5 of 5 right- Made for Women losing hair on top
- The DHT job 1,000 mg pumpkin seed oil, 320 mg saw palmetto
- Form and dose 2 softgels, every amount printed
- Blood tests Biotin 100 mcg, no iodine
- 12 weeks $59.99 for three bottles
- Price $20 a bottle on the 3-pack, more than biotin
Verdict. The only one here that gets all five right. 1,000 mg pumpkin seed oil and 320 mg saw palmetto, every amount printed. On the shot or about to start, give it 12 weeks.
Prices and labels checked September 2026.
Number oneWhat's inside number one, and how it works
Two softgels a day. Here is every amount, straight off the label.
| Ingredient | Per day | What it does |
|---|---|---|
| Pumpkin seed oil, cold-pressed | 1,000 mg | Slows how much DHT is made at the root |
| Saw palmetto extract | 320 mg | Slows it too, in a second way |
| Zinc | 10 mg | Helps keep hair healthy |
| Selenium | 55 mcg | Helps keep hair and nails healthy |
| Copper | 1 mg | Helps keep your natural hair color |
| Vitamin E | 50 mg | Helps protect cells from everyday wear |
| Biotin | 100 mcg | Low on purpose, so blood tests stay accurate |
| Iodine | None | Nothing to throw off a thyroid test |
How it works. Estrogen helps guard the roots on top. On the shot, you lose some of it along with the fat.
Women make a little testosterone too. At the root, a natural helper called an enzyme turns some of it into DHT.
DHT is the hormone that makes each new hair on top grow in thinner.
Both plants slow that enzyme, right at the root. So less DHT gets made, and less of it reaches the roots on top.
Each plant slows it in its own way. No prescription needed.
Pumpkin seed oil is pressed cold from the seeds, like a good olive oil. Saw palmetto is the berry of a small palm that grows wild in Florida.
There is one trial, and it was 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 trial in women yet. Number one has 1,000 mg a day.
It's the only one here with 1,000 mg cold-pressed pumpkin seed oil and 320 mg saw palmetto. The biotin is kept low, at 100 mcg, and there's no iodine.
It's made for women losing hair on top, on the shot or about to start.
See the full label →Now check yours
Already taking something? Check the back of the bottle for these five things. Not yet? Use them on the next one you pick up.
- Does the front say women?
- Are pumpkin seed oil and saw palmetto both on it?
- Is every amount printed, with no blend?
- Is biotin under 1,000 mcg, with no iodine?
- Do 12 weeks cost about $60 or less?
Count how many it gets right.
If yours gets only 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 shedding
Is GLP-1 hair loss permanent?
The shedding usually isn’t. It settles once your weight holds steady. The hair fills back in over the next few months. Thinning on top is the kind that can stay.
How much hair loss is normal?
Losing 50 to 100 hairs a day is normal. Shedding on the shot can be a lot more, all over, for a few months. Thinning on top is slower. Your part slowly gets wider.
When should I see a doctor?
If it’s still coming out 6 to 9 months after your weight holds steady. Or if you see round bald patches. Ask about iron, thyroid and vitamin D.
Can I take number one with my shot?
Number one is two plant extracts, three minerals, vitamin E and a little biotin. Show the label to your pharmacist first, especially if you take hormones, birth control or a blood thinner.
When would I see a difference from number one?
You won’t see much in weeks 1 to 4. Check your part at week 8. Decide at week 12.
Or you close this page. That's allowed.
Nothing happens. The shedding settles, and every few weeks you check your part in the mirror.
You can tell the two kinds apart now.
Get number one, buy 2 get 1 free →© 2026 HALO Health. All rights reserved.