WOMEN'S WELLNESS INSIDER

July 31, 2026 at 8:42 am BST

The mistake almost every woman makes in her first six months on a GLP‑1 — and how to undo it before it sets

I lost the weight. I just didn't expect to lose myself along with it. If you're on Ozempic, Wegovy or Mounjaro, I wish someone had shown me this at the start — instead of at month six.

By Amber McClellan, founder of Mainstay

Let me say the good part first, because I am not here to scare you off your medication.

 

It worked. It worked better than fifteen years of dieting ever did. The constant food noise went quiet. The 9pm negotiations with the fridge stopped. For the first time in my adult life I wasn't at war with my own appetite.

The weight came off. I have photos I actually like now.

 

So I'm not one of those people who's going to tell you the medication is dangerous, or that you should be doing this "naturally." I'd do it again tomorrow.

But somewhere around month five, I was standing in an airport, and I could not lift my own carry‑on into the overhead bin.

 

Arms up. Nothing there. A stranger did it for me, kindly, and I sat down and felt something I did not expect to feel at the end of the most successful year of weight loss in my life.

 

Not proud. Not grateful. Weak.

 

That night I did what I'd been avoiding. I typed how I was feeling into a GLP‑1 group I'd joined and never posted in. And within an hour, I realised I wasn't the only one.

Representative conversations from GLP-1 support communities

Denise · 52 · On Mounjaro for 7 months

I thought it was just me. Down 40lbs and thrilled, but I caught myself in a photo last week and my arms looked like my mother's. Nobody warned me about this part.

Shared in a GLP-1 community discussion

Renee · 45 · On Wegovy for 5 months

The weakness is real and no one talks about it. I struggled to carry the groceries in one trip last week — something I've done my whole life. It scared me more than the number on the scale ever did.

Shared in a GLP-1 community discussion

Reply after reply expressed a version of the same thing: “I thought I was the only one.”

Once I noticed it, I noticed everything

The stairs I used to take without thinking. My arms — not slim, empty. My backside, more or less gone; a favourite pair of jeans that now just hung, in a way that wasn't flattering, only sad.

 

My hairbrush had started to frighten me.

 

And the tiredness. Not "busy week" tiredness. The kind where you could lie down on the office floor at 2pm and be asleep in a minute.

 

I went looking for why. What I found first made me feel sick, and then made me quietly furious.
 

What your doctor probably didn't tell you at the pharmacy

When you lose weight this fast, you don't only lose fat.

 

Research on people losing weight on these medications has found that a large share of what comes off — in some studies up to around 40% — isn't fat. It's lean mass. Muscle. The tissue that holds you upright, that gives your arms their shape and your face its structure and your body the ability to lift a bag over your head.

Doctors have a clinical word for where that leads: sarcopenia. The forums have a blunter one.

Skinny fat. Smaller, softer, weaker — and somehow older‑looking than you were at your heaviest.

 

Which is not what I signed up for. I wanted to lose the fat. I did not want to lose me.

 

And here is the part that made me angry: the medical guidance on how to protect against it is not a secret. Every serious clinical review of these medications says the same two plain things — get enough protein, and do some resistance training. That's the defence. That's it.

 

Nobody said either sentence to me. Not the prescriber. Not the pharmacist. Not the leaflet in the box. They weighed me every month for a year and celebrated the number, and not one of them mentioned the muscle quietly leaving at the same time.

And there's a window on this

This is the part I most wish I'd understood at the start.

 

The muscle you lose in those first rapid months is not something you passively get back later. Once it's gone, rebuilding it takes deliberate work — protein and training, consistently, over months. The people who come through a GLP‑1 with their strength intact are almost always the ones who started protecting it early — not the ones who noticed at month six and tried to claw it back.

The pattern many women recognise

At first, the changes feel like progress. Then the smaller signs begin to appear.

Months 1–2

The weight starts falling

You feel encouraged. Your clothes loosen, the compliments begin, and nothing seems wrong.

Months 3–4

Your energy begins to change

The tiredness quietly creeps in. You blame your sleep, your schedule or simply getting older.

Months 5–6

The everyday signs become harder to ignore

The stairs feel different. The suitcase feels heavier. Your jeans hang differently. You notice more hair in the brush.

This is often where women begin looking for answers — and wish they had started supporting their body sooner.

Every week you spend not protecting your muscle is a week you can't get back for free. Your prescriber isn't watching this clock. It's just running.

"Just eat more protein" is the most useless advice on earth

Here's the cruel joke, and it isn't funny.

The medication works by taking your appetite away.

The advice for protecting your muscle is to eat more.

Do you see the problem?

 

I would sit down to a proper dinner — chicken, the works — and after about five bites I was done. Not pleasantly full. Full in a "one more bite and I'll be unwell" way. I'd look at the 40 grams of protein still on the plate, and I'd scrape it into the bin.

 

A woman in one of the forums wrote something I've never been able to un‑read:

Sarah M.

Shared in a GLP-1 support community · 4 months ago

I stopped thinking about meals and started thinking about bites. If I can only manage ten bites, those bites have to be protein.
247 women found this helpful
Community insight

And once I started reading properly, the same frustration was everywhere. Hundreds of women, all hitting the same wall.

“How are you all hitting your protein?” · Community discussion

Karen · 48 · On Zepbound for 4 months

Everyone says “just eat more protein.” How? I can manage half a chicken breast and I'm done for the day. The advice makes no sense for people actually on these drugs.

A common concern in GLP-1 communities

Marisol · 51 · On Ozempic for 9 months

Bought three different protein powders. All of them sit in my stomach like a brick. Two sips and I feel sick. £120 of tubs I can't drink. Anyone found one that isn't thick and milky?

Frequently echoed by other members

That last question — “anyone found one that isn't thick and milky?” — is the one I'd been asking too.

That's the whole thing, right there.

So I did what everyone does. I bought a protein shake.

The tub in my cupboard

It's still there. Three‑quarters full, since April.

Because here's what nobody selling protein powder seems to understand about being on one of these medications: a thick, sweet, milky shake is not a solution to not being able to eat. It IS eating.

 

It's a meal. It sits in your stomach like wet cement. And the smell of it, on a bad morning two days after your shot, is enough on its own to send you to the bathroom.

 

I bought a good one. An expensive one. Thirty grams of protein. It might as well have been three hundred, because I could not finish it.

 

That's when it finally landed.

The problem was never the protein.
The problem was finishing it.

Thirty grams that stays in the cupboard is zero grams. Ten grams you actually drink is ten grams. The only number that counts is the one that makes it into your body.

What I do now — the Mainstay Protocol

I stopped trying to force a meal into a body that had stopped wanting meals. And I stopped chasing the most protein. I started looking for the protein I could finish — on my worst day, not my best one.

That turned out to be much harder to find than it should be. So in the end I made it.

It's a clear one. Not a shake — you mix it into cold water and it comes out like a juice. Light, tart, cold. Nothing creamy. It doesn't sit heavy, and it doesn't smell like a milkshake at 8am when a milkshake is the last thing on earth you could face.

Ten grams of complete protein a glass — plus collagen, fibre, and electrolytes, because if you've spent any time in the forums you know those are the other half of the conversation nobody has with you either. The constipation. The headaches. The afternoon crash. Same root cause: you're barely eating, and barely drinking.

I have one every morning. That's the ritual. Thirty seconds.

 

And when I finally went back to that group and said what had worked for me — a clear one, not a shake — I realised I wasn't the only one who'd landed there either.

“The clear ones changed everything for me” · Community discussion

Joanne · 47 · On Mounjaro for 6 months

Switching to a clear protein was the only thing that stuck. It's like a cordial, not a milkshake. I can actually drink the whole thing even on a bad tummy day. Wish I'd found it eight months ago.

Shared in a GLP-1 community discussion

Theresa · 54 · On Wegovy for 10 months

Same. Cold and light is the only way I get any protein in now. The thick shakes made the nausea worse — a clear one I can sip through the morning. Total game changer for me.

Representative community response

Different women, different treatments, the same conclusion: clear, cold and light is the one you finish.

The second half — the part I nearly skipped

Protein gets the raw material in. But raw material isn't the same as keeping the muscle.

 

The clinical guidance is annoyingly clear, and I resisted it for months: protein plus resistance training is the combination that actually protects lean mass. Not one. Both.

 

So I started lifting. Twice a week. Badly. Two dumbbells in the spare room and a video on my phone.

And I started taking creatine.

 

I had to be talked into that one. I thought creatine was for men in vests. It is not. It's one of the most studied supplements that exists, and the research on strength — particularly in women, particularly in women our age — is genuinely good. Five grams a day. It's not a stimulant, it won't "bulk you up," and it doesn't do anything dramatic. It quietly helps you hold on to the thing you're trying to hold on to.

 

I take it as a gummy, because I am not mixing a second powder, and I'm not going to pretend otherwise.

So that's the whole protocol. Protein you can actually finish. Creatine. Two lifts a week you don't have to be good at.

Where I am now

I'm not going to show you a transformation photo. You've seen enough of those, and that isn't what this is about.

 

Here's what I've got instead. I can lift my own suitcase. I took the stairs this morning and didn't notice until I sat down to write this. My jeans fit the way they used to.

 

And I'm still losing weight — that never stopped. The medication is still doing its job. I'm just not disappearing along with the fat anymore.

The one thing I actually want to say to you

There's a sentence I keep seeing in these forums, and it gets me every time:

I got to month six. Something had changed, and I still don't know how much of it I get back.

You don’t have to repeat that experience. Whether you’re at the beginning or already somewhere in the middle, there is still time to support your body properly. Not another diet. Not another rigid rule. Not another thing to fail at.
01

Make the small amount count

On the days eating feels difficult, find an easier way to get some protein in.

02

Give your body a reason to stay strong

Add simple resistance work a couple of times each week, at a level that suits you.

That’s genuinely where it begins.

What I use

The Mainstay Protocol

Clear protein you can actually finish — and the creatine to go with it.

Where are you?

  • Just started your GLP-1 — get ahead of it now · the 1-month option
  • A few months in, feeling it — the tiredness, the arms, the jeans · the 3-month protocol
  • Coming up on month six, or past it — this is the one you do not wait on · the 3-month protocol

1 month · get started

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The one muscle actually responds to.

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Because your worry was never “will it work?” It’s “will I get it down when I already feel full?”

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Why women stay with it

Built for the days when eating is the hardest part.

A serving you'll finish beats one that impresses you.

10g in a light glass you actually drink, on the day you can manage five bites. Consistency does more than a big number you leave behind.

Clear, not creamy.

It mixes like a juice — no thick, milky texture sitting in your stomach. Something you can sip slowly instead of forcing down.

It slots into the morning you already have.

Protein, fibre, electrolytes and a light lift of caffeine in one cold glass — at the exact point in the day you were already reaching for something.

Protein for the intake. Creatine for the strength.

The 3-month protocol includes a full daily serving of creatine alongside the protein. Two simple habits that work together.

The easiest time to start is before it feels urgent.

Strength builds back slowly. Starting now means you're not waiting for the tiredness or the jeans to be the reason you finally act.

Lose the weight. Keep the strength.

Reserve my 3-month protocol

Mainstay research links:

The Race Is On to Stop Muscle Loss.

 

The acute effects of four protein meals on insulin, glucose, appetite and energy intake in lean menManaging the gastrointestinal side effects of GLP-1 receptor agonists in obesity: recommendations for clinical practice.

 

Preserving Healthy Muscle during Weight Loss1,2,3

 

Weight loss drug may change how obese people perceive taste.

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