Sure. But what's the proposed mechanism? For many - not all, obviously - medications, we have an understanding of potential long term risks. Animal studies catch some of them, others we know are potentially risky even without animal studies, e.g. drugs that increase angiogenesis have a risk of increasing tumor growth.
But no one has proposed mechanisms for GLP1 peptides.
Meanwhile, we know obesity is one of the largest long term risks to health in existence, and one of the most prevalent.
> But no one has proposed mechanisms for GLP1 peptides.
I'm worried about long term malnutrition leading to significant loss of muscle mass, osteoporosis, and other deficiencies that eventually lead to infirmity and brings forward the immobility death spiral much earlier in late age through weak muscles and bones. Most of the long term studies on GLP-1 agonists that I've reviewed have been on diabetic patients who already had to carefully control their diets and we still don't know what decades of poor diet on Ozempic will do.
For very obese people the tradeoff is still pretty damn good though.
Probably more or less the same as to what happens with skinny people who have a garbage diet but just eat less or have significantly higher metabolisms.
It's not great.
The good news is it's quite commonly reported (and I can add my anecdotal experience to the chorus) that I don't crave the food that's worst for me in any real quantity anymore. Even if I'm busy and need to scroll through uber eats, I'm not using it as an excuse to get a delicious but large, fried, high in carbs, high in fat meal. It's way easier for me to say "yeah that tastes good, but I'll grab the grilled chicken wrap and brown rice."
I'm not sure on what causes this - we have some preliminary studies around GLP1 peptides, dopamine, addiction, etc., so it might be something there. But the sheer number of people you hear talking about it makes me believe we'll have some studies that do look into it in the future. It might not happen to everyone, and some people might still just choose to eat poorly even if it does, but in both situations people's longterm health depends on them listening to advice on how to eat better and exercise, and I think most people would rather be average weight and metabolically unhealthy than obese and metabolically unhealthy.
One obvious risk would be blunting of longer term GLP-1 receptor activation. Imagine type 2 diabetes but for ghrelin.
To use an analogy amphetamines have a honeymoon period, and it feels like a lot of people on these weight loss drugs haven’t been on them long enough to get past the honeymoon period and see what the effects are after 10, 20, etc years
It's possible. But, we've had another GLP-1 medication in use for about a decade and a half now - liraglutide. So far, we haven't seen evidence of that occurring.
I don't think anyone who is both informed and sane would suggest that it is impossible that there are negative long term impacts from taking the medication. Just that we have no current indication of them, and that being afraid about a "what if" without any concrete concerns when the alternative is the "continue being in one of the riskiest states possible for human health" is silly.
People don't realize that Ozempic is already a third generation GLP drug, Mounjaro is a 4th, and the try generation drugs are already in wide scale clinical trials.
We do in fact know a lot about how these drugs affect people by now, and as you point out, we have well over a decade of data on them.
That's the danger of any rapid weight loss where you don't exercise and ingest additional protein.
I knew about it from prior research, but my doctor made sure to mention it to me as well. He's also monitoring the speed of my weight loss to determine if I should go on ursodiol to prevent gallstones - another potential side effect of rapid weight loss.
But the same could happen on any sort of caloric deficit. The GLP1 drug isn't causing you to lose muscle through some reaction occurring inside your body - it's your body just doing what it does in a calorie deficit when you aren't overindexing on protein and working out.
All significant weight loss includes some loss of muscle mass. Minimizing that is why every patient is advised and counseled to lift and work out, change their lifestyle and diet, and so on.
The pill alone isn’t magic. It just makes it possible to do the right things for people who found it impossible to do before.
Nobody has yet been on these drugs for an entire lifetime - which is what is being advocated in this thread.