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Your GLP-1 gave you your body back. Then it took your hair.

Here is what is actually happening on top of your head — and why waiting for it to grow back is the one thing that makes it worse.

Dr. Ellen Marsh
Dermatologist • 5 min read
Before, after, and the top of her head
The two photos everybody takes. And the third one nobody does.

Your GLP-1 did not just take the weight off. It took your estrogen with it.

And "just eat more protein" is making it worse.

I need to say something about the advice you have already been given. The wait, it will grow back advice.

Because I have watched that advice hurt more women than it has helped.

My name is Dr. Ellen Marsh. I have been a dermatologist for seventeen years, and I work almost entirely on hormonal hair loss in women.

Over the last two years something in my practice changed.

I used to mostly see women in the middle of shedding. Terrified. Hair in the shower. Drain blocked. Pillow covered. That appointment I know how to handle.

The ones that break my heart now are different.

They are not shedding anymore. The scary part is over. The drain looks normal.

And they sit down, pull out their phone, and show me two photos side by side. Their hair two years ago. Their hair now.

Not gone. Not bald. Just thin. Flat. Like somebody turned the volume down on their hair and it never came back up.

Michelle waited eleven months

A patient came in last month. Forty-six. Fourteen months on a GLP-1. Forty-one pounds down.

She was proud of that. She should be.

Then the shedding started. Month four. Like clockwork.

She called her doctor and was told: completely normal. Telogen effluvium. A temporary response to fast weight loss. Keep your protein up, take your biotin, give it six months, it resolves on its own.

So she did everything right.

She forced down a hundred grams of protein a day even though the medication killed her appetite. She bought the 10,000 mcg biotin. She was patient. She waited.

And at month five, the shedding did slow down.

She thought: finally.

Then she waited for the regrowth.

Month seven. Still flat. Month nine. Still thin. Month eleven — her part was still twice as wide as it used to be, the hair around her face was still wispy, and she could still see her scalp in the wrong light.

The shedding had stopped. Her hair had not come back.

"Did I do something wrong?" she asked.
She hadn't. The advice she was given wasn't wrong. It was incomplete.

And that incomplete advice cost her eleven months.

The drain, the brush, the part, the ponytail
Four photos on Michelle's phone. Every woman I see has the same four.

There are two things happening at once

This is what nobody explains to women on a GLP-1.

Two separate problems. At the same time. And almost every doctor, including the good ones, is only answering one of them.

1. The shed

Fast fat loss reads to your body as physical stress. A load of follicles switch to resting at the same time and let go together two to four months later. That is the drain-clogging phase. It is real, it is temporary, and it does resolve on its own.

2. The thinning

Quieter. It does not show up on a blood panel. It does not clog anything. And it does not stop on its own — it is still going right now, while you wait for the shedding to settle.

The "just wait" advice is talking about the first one. It is correct about the first one.

Nobody is talking about the second one.

What is actually happening to the root

DHT is a hormone that has been in your body your whole life. It is made from testosterone, and it sticks to the roots on the top of your head.

Under normal circumstances estrogen sits in front of those roots and blocks it. That is why women with healthy estrogen rarely lose their hair. DHT cannot get through.

Now here is the part almost nobody says out loud.

Fat cells make estrogen. After menopause, body fat is one of the last places you still make any at all.

So when the fat comes off fast, the estrogen goes with it.

And your follicles lose the shield.

GLP-1 takes the fat off. The fat was making your estrogen. Less estrogen means DHT reaches the root.
The whole mechanism on one board.

DHT — the same DHT that has been there your entire life — now has direct access. It attaches to the root. The root gets a little smaller.

And the hair that grows out of a smaller root is thinner. Weaker. Shorter.

Your hair is not falling out more than it used to. It is coming back thinner. Every single cycle.

  • DHT does not stop because you waited six months.
  • DHT does not stop because you hit your protein.
  • DHT does not stop because your labs came back normal.
DHT stops when something gets in its way.

And nothing in the "just wait" protocol gets in its way.

Here is the one thing that tells you which problem you have

Put your hand on the back of your head.

If this were a shortage — low iron, not enough protein, whatever the tub in your cabinet is promising — the back would be thin too. You cannot be short of something in one square inch of scalp and completely full of it two inches lower down.

The back of your head is fine. It has always been fine.

It is only the top. Your part, and the corner above each ear.

A shortage thins everywhere.
Yours stops in a line.
A line means a hormone.

What does not block DHT

Biotin does not. Protein does not. Collagen does not. Waiting does not.

Those things support hair growth and they are not wrong to take. But you cannot feed a root back to health while a hormone is shrinking it at the same time.

It is watering a plant while somebody pours weedkiller on the roots.

I have had patients spend eighty-five dollars a month on a hair supplement for six months. I have had patients on minoxidil, which comes with a dread shed, has to be done every day forever, and drops the hair worse than before the moment you stop.

None of it goes near the hormone.

What does

Two things. Together. And they work completely differently, which is exactly why you need both.

Pumpkin seed oil

Turns down the factory. It contains phytosterols that get in the way of the enzyme that converts testosterone into DHT. Less enzyme activity, less new DHT.

Saw palmetto

Puts a lock on the door. It blocks the DHT that is already in your scalp from attaching to the root in the first place.

One reduces how much is made. One blocks what is already there.

On the pumpkin seed oil there is a real clinical trial, and I will tell you the part everybody else leaves out: it was men, it was 400 mg a day, and hair count went up 40% at 24 weeks. That is what the study says. Not more than that.

Why buying them separately usually fails

I have had patients try. A fourteen-dollar bottle of pumpkin seed capsules and a saw palmetto off the vitamin shelf. Four months later, nothing.

Here is why.

Most cheap saw palmetto is the dried berry ground into powder, which is a completely different thing at a fraction of the strength. It has to say extract, and it has to print the milligrams.

And most of them will not print it at all. They bury it inside a "proprietary blend" so you cannot see how little is in there. If a label will not tell you the number, that is the answer.

So you end up with two bottles delivering almost nothing, you stop, and you conclude that this does not work.

It works. The label has to be right.

What I tell my patients to look for

I stopped recommending hair vitamins years ago and started telling women to turn the bottle over and read five lines.

Pumpkin seed oil, cold pressed, milligrams printed. Saw palmetto extract, milligrams printed. Zinc and selenium with numbers. Biotin at 100 mcg and not 10,000 — the huge doses do nothing for your hair and they can throw off a thyroid blood test, which is the one test you want to be accurate. And no iodine.

The one that passes is HALO Hair.

HALO Hair
HALO Hair
Two softgels a day • 60 per bottle • every dose printed
  • Cold-pressed pumpkin seed oil1,000 mg
  • Saw palmetto extract320 mg
  • Zinc10 mg
  • Selenium55 mcg
  • Copper1 mg
  • Vitamin E50 mg
  • Biotin100 mcg
  • IodineNone
No proprietary blend. Every number is on the back of the bottle, which is the whole point.

What to expect, honestly

Weeks 1–4

Usually nothing you can see. This is where most women quit. Do not judge it here.

Weeks 4–8

Less in the drain and less in the brush. Several of my patients tell me this is the first wash in months where their stomach did not drop.

Weeks 8–12

Short hairs standing up along the part and around the hairline — the ones that will not lie flat. New growth that is actually establishing, because the root is not being shrunk while it tries.

Month 3–4

The hair tie goes round one more time. That is not a feeling, it is a number, and it is the only measurement I trust.

Not everybody is the same. Some are faster, some slower. But the women who get in the way of the hormone see something that waiting never gave them.

I saw Michelle again six weeks later

She did not show me photos this time.

She pulled her hair back into a ponytail when she walked in, and looked at me, and smiled.

"It's different," she said. "I can feel it."

Not finished. Not back to where she was before any of this started. But moving, for the first time in almost a year.

If you have been waiting

I am asking you to stop.

Not because the shedding will not slow down on its own. It probably already has.

But the hormone that has been working on your roots this entire time has not stopped, and every week that goes by without anything in front of them is another week of roots getting smaller.

You do not have to choose between your GLP-1 and your hair.

And you do not have to accept thin, flat, wispy regrowth as the new normal.

Get HALO Hair →

One bottle. No subscription. 90 days — if nothing changes, you get your money back.

This article is for educational purposes and is not a substitute for professional medical advice. Talk to your healthcare provider before starting any new supplement, particularly while taking a prescription medication. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

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