3 ms·

https://pubmed.ncbi.nlm.nih.gov/38629387/ https://pubmed.ncbi.nlm.nih.gov/38629387/ > Conclusion: Semaglutide displays potential for weight loss primarily thro

https://pubmed.ncbi.nlm.nih.gov/38629387/ https://pubmed.ncbi.nlm.nih.gov/38629387/ > Conclusion: Semaglutide displays potential for weight loss primarily through fat mass reduction. However, concerns arise from notable reductions in lean mass, especially in trials with a larger number of patients. That's a significant long-term damage to health, quite possibly permanent for 40+ patients.

Daishiman 1y ago
That has nothing to do with GLP-1 agonists and everything to do with the fact that rapid weight loss without exercise and sufficient protein intake leads to substantial lean mass reduction. It's still better unless you were woefully weak, in which case a doctor should have prescribed adequate nutrition and physical activity.
AlphaAndOmega0 1y ago
Sounds scary doesn't it? It's a shame that the magnitude of lean-muscle loss is entirely comparable to that of going on a strict diet or fasting: Intermittent/time-restricted fasting https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2771095 https://jamanetwork.com/journals/jamainternalmedicine/fullar...? That's simply how the body reacts to a caloric deficit, without additional exercise. If you combine both IFT and resistance exercise, you find no muscle loss at all: https://pmc.ncbi.nlm.nih.gov/articles/PMC7468742/ https://pmc.ncbi.nlm.nih.gov/articles/PMC7468742/ That's an apple to oranges comparison, because there's nothing preventing someone from taking Ozempic from exercising on the side. And in fact, other trials found that the overall ratio of fat:muscle lost was rather favorable, and that functional strength wasn't compromised: https://dom-pubs.onlinelibrary.wiley.com/doi/10.1111/dom.15728 https://dom-pubs.onlinelibrary.wiley.com/doi/10.1111/dom.157... >Based on contemporary evidence with the addition of magnetic resonance imaging-based studies, skeletal muscle changes with GLP-1RA treatments appear to be adaptive: *reductions in muscle volume seem to be commensurate with what is expected given ageing, disease status, and weight loss achieved, and the improvement in insulin sensitivity and muscle fat infiltration likely contributes to an adaptive process with improved muscle quality, lowering the probability for loss in strength and function* Interpreting the risks and benefits of medication isn't a trivial exercise, if you're driven by a handful of studies or ignorant of the wider context, then it's easy to be mislead.
- friendzis 1y ago
  > That's an apple to oranges comparison, because there's nothing preventing someone from taking Ozempic from exercising on the side. Strongly disagree on this. If there was nothing preventing the patient from changing their diet and physical activity / exercise level they could lose the fat through diet and exercise without resorting to taking semaglutides in the first place. Withdrawal studies show that there is a clear tendency for the weight to rebound after withdrawal from semaglutide use, therefore it's very hard to argue that it is the weight / fat mass alone blocking patients from indulging in a healthier lifestyle. Semaglutide may help manage sustained weight loss by e.g. reducing the effect of reduced leptin baseline, however overall I remain highly skeptical of possibility for semaglutides to be "a first-choice approach to robust weight loss".

Daishiman 1y ago

That has nothing to do with GLP-1 agonists and everything to do with the fact that rapid weight loss without exercise and sufficient protein intake leads to substantial lean mass reduction. It's still better unless you were woefully weak, in which case a doctor should have prescribed adequate nutrition and physical activity.

AlphaAndOmega0 1y ago

Sounds scary doesn't it? It's a shame that the magnitude of lean-muscle loss is entirely comparable to that of going on a strict diet or fasting: Intermittent/time-restricted fasting https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/2771095 https://jamanetwork.com/journals/jamainternalmedicine/fullar...? That's simply how the body reacts to a caloric deficit, without additional exercise. If you combine both IFT and resistance exercise, you find no muscle loss at all: https://pmc.ncbi.nlm.nih.gov/articles/PMC7468742/ https://pmc.ncbi.nlm.nih.gov/articles/PMC7468742/ That's an apple to oranges comparison, because there's nothing preventing someone from taking Ozempic from exercising on the side. And in fact, other trials found that the overall ratio of fat:muscle lost was rather favorable, and that functional strength wasn't compromised: https://dom-pubs.onlinelibrary.wiley.com/doi/10.1111/dom.15728 https://dom-pubs.onlinelibrary.wiley.com/doi/10.1111/dom.157... >Based on contemporary evidence with the addition of magnetic resonance imaging-based studies, skeletal muscle changes with GLP-1RA treatments appear to be adaptive: *reductions in muscle volume seem to be commensurate with what is expected given ageing, disease status, and weight loss achieved, and the improvement in insulin sensitivity and muscle fat infiltration likely contributes to an adaptive process with improved muscle quality, lowering the probability for loss in strength and function* Interpreting the risks and benefits of medication isn't a trivial exercise, if you're driven by a handful of studies or ignorant of the wider context, then it's easy to be mislead.

friendzis 1y ago
> That's an apple to oranges comparison, because there's nothing preventing someone from taking Ozempic from exercising on the side. Strongly disagree on this. If there was nothing preventing the patient from changing their diet and physical activity / exercise level they could lose the fat through diet and exercise without resorting to taking semaglutides in the first place. Withdrawal studies show that there is a clear tendency for the weight to rebound after withdrawal from semaglutide use, therefore it's very hard to argue that it is the weight / fat mass alone blocking patients from indulging in a healthier lifestyle. Semaglutide may help manage sustained weight loss by e.g. reducing the effect of reduced leptin baseline, however overall I remain highly skeptical of possibility for semaglutides to be "a first-choice approach to robust weight loss".