GLP-1 & your hair
Does GLP-1 Hair Loss Stop? The Shedding Does. Thinning on Top Doesn't
On the shot or about to start? When shedding starts and stops, and 5 things women take for it, checked label by label.
- The shedding stops. It usually starts around month 3. It usually ends 3 to 6 months after your weight holds steady.
- Thinning on top doesn’t stop by itself. Watch for a wider part while the back stays thick.
- 5 things women take for it, checked on the same 5 points. Only one gets all 5 right.
Yes, GLP-1 shedding stops. It usually shows up around month 3. It usually ends 3 to 6 months after your weight holds steady.
Thinning on top is different. It doesn’t settle by itself. That’s the one to look after, on the shot or before you start.
The scale is finally moving. Then, around month 3, your hair starts falling out. All you want to know is when it will stop.
Not on the shot yet? You want to know what's coming, and when.
There are two answers, because two things can happen to your hair at once.
Why it happensWhat's going on
The first is shedding: hair falls out all over your head. Fast weight loss sets it off, and it stops by itself.
The second is thinning on top. Two hormones 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 helps keep DHT away from the hair roots on top.
- 2You lose fat fast
Your body fat makes some of your estrogen. Less fat means less estrogen.
- 3The hair on top thins
DHT gets to the roots on top. Each new hair comes in thinner.
How you got hereMonth by month: shedding and thinning on top
Here’s how it usually goes, counting from your first shot.
| When | Shedding | Thinning on top |
|---|---|---|
| Month 1 and 2 | Usually nothing yet | Usually nothing new |
| Month 3 to 6 | The worst of it. Hair in the brush, drain and pillow | The part can start to look wider |
| Once your weight is steady | Starts to slow | Keeps going at its own pace |
| 3 to 6 months after that | Settled, for most women | Doesn't stop by itself |
Losing 50 to 100 hairs a day is normal. When shedding is heavy, it can reach about 300 a day.
People tell you to eat more protein, take biotin or just wait it out.
Protein protects your muscle, so keep eating it. It just doesn’t help with thinning on top.
And waiting works for shedding.
For me, shedding began in month five, lasted five months, and stopped as suddenly as it had started.
A woman on a GLP-1, in a Reddit thread
After shedding stops, hair usually fills back in within 6 to 9 months. The first new hairs can feel short and wiry.
But for some women, shedding stops and the part stays wider. That’s thinning on top. It doesn’t stop by itself.
In the mirror, shedding thins your hair all over.
Thinning on top shows at the part and the crown, while the back stays thick.
Not on the shot yet? Shedding usually doesn’t start until month 3. So you have time to look after the hair on top.
The checksThe 5 things that matter
Researchers have studied two plants for slowing DHT. One is pumpkin seed oil. The other is saw palmetto, the berry of a small palm tree.
What to look for on the label
Here’s what to look for on the back of the bottle.
- Made for women. It says women losing hair on top, not just “hair.”
- The DHT job. It has pumpkin seed oil and saw palmetto, with the amounts.
- A dose you can read. You take it by mouth. Every amount is printed, with no “blend.”
- Blood tests. Low biotin and no iodine, so your blood tests stay accurate.
- 12 weeks. Hair needs about 12 weeks to show a change. Enough for 12 weeks costs about $60 or less.
We checked every product below on these same five things.
The rankingWhat women take while they wait, worst to best
Women on the shot often take protein, biotin, Viviscal hair pills or minoxidil, the drug in Rogaine. We checked one of each and one more, straight off the back label.
✓ Gets it right · ✕ Problem · ! Okay, not ideal
Premier Protein 30g Protein Shake
1 shake a day
Gets 1 of 5 right- Made for Muscle, for anyone
- The DHT job Protein and vitamins, no DHT plants
- A dose you can read Every amount printed
- Blood tests Low biotin, a little iodine
- 12 weeks About $168
- Price About $2 a shake
Verdict. Protein protects your muscle while the weight comes off, so it’s worth drinking. It just doesn’t help with thinning on top.
Nature’s Bounty Biotin 10,000 mcg
1 softgel a day
Gets 2 of 5 right- Made for Anyone: energy, skin and hair
- The DHT job Biotin only, nothing for DHT
- A dose you can read 1 softgel, the amount printed
- Blood tests Biotin 10,000 mcg, the most here
- 12 weeks One bottle, under $20
- Price Under $20 for 4 months
Verdict. It’s cheap and easy, one softgel a day. But it’s the biggest biotin dose here, and that much can throw off a thyroid test. It does nothing about 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
- A dose you can read Collagen and oyster in one total
- Blood tests Low biotin, no iodine
- 12 weeks About $120
- Price About $40 a month
Verdict. It’s made for women and won’t throw off blood tests. It feeds your hair while shedding runs its course, but nothing in it works on DHT.
Women's Rogaine 5% Minoxidil Foam
Half a capful on the scalp, once a day
Gets 3 of 5 right- Made for Women thinning on top
- The DHT job Works on growth, not on DHT
- A dose you can read 5% on the label, but a foam, not a pill
- Blood tests Nothing to throw off a test
- 12 weeks Under $60
- Price About $11 to $15 a month
Verdict. It’s cheap, and it helps a lot of women. But it does nothing about DHT. If you stop, the loss comes back. Some women get facial hair from it.
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
- A dose you can read 2 softgels, every amount printed
- Blood tests Biotin 100 mcg, no iodine
- 12 weeks $59.99 for three bottles
- Price $20 a bottle when you buy 3, more than the foam
Verdict. The only one here that gets all five right. It has 1,000 mg pumpkin seed oil and 320 mg saw palmetto. Biotin stays low. About to start? Start taking it with your first shot.
Prices and labels checked September 2026.
Get number one, buy 2 get 1 free →Number oneWhat's inside number one, and how it works
You take two softgels a day. Here’s everything in them, and how much.
| Ingredient | Per day | What it does |
|---|---|---|
| Pumpkin seed oil, cold-pressed | 1,000 mg | Slows DHT at the root |
| Saw palmetto extract | 320 mg | Slows DHT too, in its own 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 | An everyday antioxidant |
| Biotin | 100 mcg | Low on purpose, so it won’t throw off blood tests |
| Iodine | None | Left out on purpose |
Every amount is printed on the label. No blend.
How it works
Estrogen helps guard the top. On the shot, it drops along with the fat.
Women make a little testosterone too. At the root, a natural switch called an enzyme turns it into DHT. That’s the hormone that thins the top.
Both plants slow that switch, so less DHT reaches the roots on top.
Each plant does this in its own way. No prescription needed.
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 that grows wild in Florida.
What the research says
There’s one small study, in men. The men took 400 mg of pumpkin seed oil a day for 24 weeks. At the end, they had about 40% more hairs.
There’s no study like it in women. Number one has 1,000 mg of pumpkin seed oil a day.
Which kind it's for
Number one is for thinning on top, not for shedding.
Hair grows slowly, so give it 12 weeks. In the first month you won't see much, and that's normal.
What makes it different
It’s the only one here with 1,000 mg cold-pressed pumpkin seed oil and 320 mg saw palmetto. And it keeps biotin low.
It’s made for women losing hair on top, whether they’re on the shot or about to start.
See the full label →Your turnNow check yours
Already taking something for your hair? Check it for the same five things.
- Does it say women on the front?
- Are pumpkin seed oil and saw palmetto both on it, with amounts?
- Is every amount printed, with no blend?
- Is biotin low, with no iodine?
- Does enough for 12 weeks cost about $60 or less?
How many did it get? The others above get one to three.
That’s not your fault. 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 how long it lasts
When does GLP-1 hair loss start?
Most women notice it between month 3 and month 6. It shows up 2 to 3 months after the weight starts coming off fast. Moving up to a higher dose can set it off too.
When does it stop?
As doctors say, shedding usually settles 3 to 6 months after your weight levels off. See your doctor if it’s still coming out 6 months after that, or if your part keeps getting wider. Ask them to check your iron, thyroid and vitamin D.
My weight is steady. Why is it coming out now?
Shedding shows up a few months after the weight comes off. If it’s mostly at the part and the crown, that’s thinning on top. Either way, ask your doctor to check your iron and thyroid.
Is it permanent?
Shedding usually isn’t. Thinning on top is different, because it doesn’t settle by itself. Watch your part, not just the drain.
Should I stop the shot?
That’s up to you and the doctor who prescribes it. In the big trials of Zepbound, no one taking the shot stopped it because of hair loss. And shedding usually stops by itself.
Or you can just close this page.
Shedding runs its course, and you keep an eye on your part.
You know the five things now. Next time a bottle catches your eye, check the back.
Get number one, buy 2 get 1 free →© 2026 HALO Health. All rights reserved.