GLP-1s eating your muscle?

[SunnyCookie]

I'm curious if anyone has gotten a DEXA scan before and after starting GLP-1 receptor agonists like semaglutide or tirzepatide to see what's happening with their body composition.

I was reading a blog recently that mentioned how these drugs can lead to a loss of lean mass, especially if you're not already overweight. The idea is pretty straightforward: if you eat less, you lose both fat and muscle.

What are some ways to combat muscle loss on these meds?

* Up your protein intake with supplements like whey protein since it's easier to drink when you're not as hungry.
* Optimize hormones (like TRT).
* Hit the weights!

 

[Eddie09]

Great info! When your body is burning fat, it's also going to burn some muscle, which is why you should lift weights and eat more protein when you're dieting. A lot of people using these drugs are hoping for a shortcut.

 

[FunkyBetter]

I tried semaglutide a while back, just one dose, and I think it's terrible. I couldn't work out properly because I felt so weak. Maybe it's just me tho.

I had 2 DEXA scans within about 3 months. In that time, I lost about 9lbs of fat and gained about 1 lb of muscle. Body fat went from 30% to 27.5%. I'm on TRT and I eat about 2g of protein per pound of bodyweight.

 

[SunnyCookie]

Which GLP-1 did you try, @FunkyBetter? It sounds like it worked well based on your DEXA scan results!

 

[FunkyBetter]

I was on semaglutide. It did not work how I wanted it to. I only had 1 injection. That was way before I started trying to cut weight.

 

[HeartCoffee]

I agree with @Eddie09 that resistance training is essential. Also, ensure adequate hydration. Dehydration can sometimes mask as hunger or fatigue and lead to poor dietary choices and hinder workout performance.

 

[ScaleStory]

Has anyone tried creatine while on semaglutide or similar meds? I'm thinking about starting it to help preserve muscle mass during workouts. I just started a few weeks ago and it seems to be helping a bit.

 

[HeartCoffee]

I've seen creatine discussed re: GLP-1s. It's generally considered a safe and effective supplement, especially for muscle retention. Some people experience initial water weight gain, but the benefits often outweigh this. There's also research suggesting cognitive and cardiovascular benefits. Discuss with your healthcare provider, of course.

 

[SunnyCookie]

Thanks for the tip about creatine, @HeartCoffee. I've heard good things about it for muscle health and overall well-being. I might give it a try alongside the protein supplements.

 

[Eddie09]

Good luck on your journey, @SunnyCookie!

 

[edamame_stroller]

Few points here: GLP-1 agonists reduce food intake (among many other documented effects) which hurts testosterone. Insulin sensitivity - I think you meant that improves, though fasting without undereating does the same. Working to muscle failure at high frequency (4-5 day training splits) risks overtraining and testosterone suppression. Simple under-nutrition tanks T levels too. Did you try clomiphene or clomid before moving to replacement therapy? And what low testosterone signs are you targeting - thyroid and other hormonal imbalances might be factors.

 

[peanutwanderer84]

I'm currently part of a study for a muscle-sparing compound paired with a glp-1, and the results have been really encouraging. I've dropped 42 lbs so far and my lean mass is actually up about 6%. Pretty wild that I'm not losing muscle at the same rate I expected.

 

[dose5-soon69]

Losing 1-2 pounds weekly or 4-8 monthly is ideal for mostly fat and not muscle with strength training and protein. People dropping crazy amounts fast usually have water and inflammation loss early or aren't exercising and losing equal fat and muscle. You're doing it right. Stick with it. Didn't gain overnight, won't lose overnight.

 

[wasabigardenerhq]

The structured nutrition and fitness program before getting approved was rough. This route feels like it's paying off with less friction.

 

[Curated_Cloud7]

What's your protein strategy looking like? Are you bumping down the mounjaro dose to rebuild some muscle, or hitting it differently with food?

 

[ProteinGal82]

Protein target is 0.7-1g per pound of lean mass on GLP-1. Most people hit it with 4-5 small doses across the day rather than 2-3 big meals. Shakes and cottage cheese are the easiest to get down when appetite is suppressed.

 

[Robin16]

Protein plus fiber together is what actually protects lean mass - not just hitting total calories. Slow pace helps too. DEXA data consistently shows better composition outcomes when both are prioritized.

 

[B_W_Thompson]

Periodic refeeds are worth trying before assuming the medication needs adjusting. Metabolism adapts faster than most people expect at a significant deficit.

 

[Just_Mom]

DEXA before and after is the most direct way to answer the body composition question - the muscle loss data on GLP-1s is real but context-dependent on protein intake and resistance training volume, and people who track both metrics usually see a better lean mass preservation ratio than the general studies suggest.

 

[Bee_Tracker]

The recommendation overlap is the point - high protein whole foods being the answer for both GLP-1 muscle preservation and general satiation means you're not trading one goal for the other. For lean mass specifically, protein intake is the variable most worth tracking, and those foods cover it.