Ozempic alternatives: what's out there and what actually works
GLP-1 drugs are everywhere in the headlines. From promising pipeline candidates to supplements that don't live up to the hype: here is what the evidence says right now.
If you follow the world of weight loss and healthy aging, you can't escape them: substances that work like Ozempic but better, safer, or cheaper. The reality is that most claims outrun the evidence by a wide margin. This overview, part of Interventions & treatments, puts the strongest candidates side by side and tells you what holds up and what doesn't.
Retatrutide beats Ozempic on paper, but you can't get it anywhere
Indirect comparisons across studies suggest that retatrutide produces an average body weight loss of around 22%, compared with roughly 14% for semaglutide (the active ingredient in Ozempic and Wegovy). That gap sounds impressive, but no direct head-to-head trial between the two drugs exists. Pooled analyses of existing research point in that direction, but as long as retatrutide has not been approved and its long-term safety remains unknown, semaglutide and tirzepatide are the only realistic options for anyone who wants treatment today. More on the comparison at is retatrutide more effective than Ozempic.
GLP-1 drugs help most when you already have a condition
Ozempic and related drugs are not purely weight-loss medications. For people with cardiovascular disease, kidney disease, or fatty liver disease, the evidence for real health benefits is solid, and those conditions become increasingly common with age. As an anti-aging tool for otherwise healthy people, the case has not yet been made. On top of that, muscle loss is a genuine risk for older adults taking these drugs, something that can seriously undermine any longevity argument. Ongoing studies still need to confirm whether the encouraging signals around dementia and broader aging hold up. Read more at do GLP-1 drugs help you age more healthily.
Metformin without diabetes: limited evidence, unknown risks
Metformin has been on the longevity community's radar for years as a cheap and widely available option. It can promote weight loss in people without diabetes, but the evidence comes from non-randomized studies and must therefore be treated as preliminary. More concerning, cell and animal research points to a possible cardiac-rhythm risk in healthy users, a risk that has not yet been properly characterized. If you are considering it, do so only in consultation with a doctor. See also can you take metformin without diabetes.
Rapamycin is not something you can eat your way to, and barely something a doctor will prescribe
Rapamycin is a drug, not a nutrient. You cannot get it through your diet. Doctors prescribe it for kidney transplants and a handful of rare conditions, but not as an anti-aging treatment: clinical studies have so far produced no convincing result for that purpose, and no mainstream physician has guidelines allowing them to prescribe it off-label to healthy people. Diet does influence the signaling pathway that rapamycin is named after, through protein intake and leucine, but that is a fundamentally different mechanism. Details at will a doctor prescribe rapamycin.
NAD+ supplements do what they promise biochemically, but nothing beyond that is proven
NMN and NR demonstrably raise NAD+ levels in the blood and appear safe at the doses studied. Whether that actually translates into greater muscle strength, a sharper memory, or a heart that ages more slowly is another matter. Human trials are too small and their results too inconsistent to support firm conclusions. The strongest signals still come from cell and animal studies, and those have not been confirmed in people. One practical note: NR is authorized as a supplement in the EU, while NMN is not yet. More at are NAD+ supplements worth it.
Colostrum has one legitimate use case: fewer infections in athletes
The claims made for colostrum vary wildly, but the evidence clusters around a single group: athletes who are prone to respiratory infections. That is where the most positive signals have been found. For broader applications such as muscle strength, bone density, or slowing aging, the research is too thin or the studies contradict one another. If you don't train intensively, there is little reason to try it.
A waste of money: electrolyte powders, broad-spectrum antioxidants, and full-body MRI scans
Three categories where the marketing claim far outstrips the evidence. Electrolyte supplements have a clear role in dehydration caused by acute diarrhea or advanced kidney disease, but for healthy people who eat normally or exercise regularly, there is no supporting evidence at all. Antioxidant supplements as a general preventive measure are similarly not recommended: curcumin and vitamin C+E show the strongest signals for specific complaints such as endometriosis, but a broad anti-aging effect has not been demonstrated. And the preventive full-body MRI? There is no evidence that it leads to better health outcomes in healthy people, while incidental findings and unnecessary follow-up diagnostics are real risks.