Both of these studies are observational and retrospective, meaning they can only show a correlation between GLP-1 use and reduced (or at least less severe) infections, not prove a direct cause-and-effect relationship. At the same time, these are the only latest pieces of evidence pointing to a genuine germ-busting benefit from GLP-1 drugs.

I wonder if the likelihood that people taking a GLP-1 are probably better off financially, have a health care provider willing to spend on the drugs (and therefore probably a better medical system) or a combination of these and other traits are the real reason there are fewer infections.

Severely cutting calories while staying sedentary trashes the immune system, disrupts hormones, impairs reproductive function, and strips away bone density and muscle?

If this happens to high-performing athletes, there is no reason to believe sedentary folks are immune. The research behind Relative Energy Deficiency in Sport breaks down these exact mechanisms: https://en.wikipedia.org/wiki/Relative_energy_deficiency_in_...

GLP medications blunt your appetite so you eat less, but you still end up feeling completely drained because your body lacks fuel. The goal should never be just blindly slashing calories. You have to feed your body what it needs rather than solely cutting what it craves, and GLP drugs cannot distinguish between nutrient-dense meals and the junk food binges you are trying to avoid.

They do not fix metabolism, either. Any claimed "metabolic boost" has never been proven beyond a minor 100 kcal increase in resting metabolic rate (RMR). Most people pushing that claim rely on an older study where glucagon raising RMR was merely an interpolation by the authors. To put that in perspective, a 100 kcal bump is less than two slices of bread, which sit around 130 kcal.

Being healthy is not just about avoiding excess body fat. Look at retired sumo wrestlers: they carry significant weight, yet their health markers crater once they stop training while keeping their diet identical. Real body fat reduction requires higher activity levels, but most GLP users fixate entirely on scale weight. Crashing your intake on high doses also sets you up for serious bile and gallbladder complications down the road.

Give it a few years, and we will look back on handing GLP prescriptions to people who are only 10 to 20 kg overweight as a major mistake. You do not have to gorge yourself to gain weight. Dropping into a sedentary lifestyle reduces muscle mass, lowers your RMR, and tanks your daily energy expenditure, pulling your maintenance baseline down with it. Once your maintenance drops, running a tiny surplus of just 100 kcal a day for four years will easily pack on 20 kg of fat.

but for something like reducing disease infection, i find it a lot harder to understand why we don't create this naturally unless there is some equal-but-opposite cost that we'd incur, or if there is not actually as big of a benefit as we believe (or if this is all just colinear with the weight loss stuff).

note: i have no background in any of this and have no idea what i'm talking about

This is incredibly manipulative. So, we're going to ignore all other factors that may have played into this and just assume it was due directly to GLP-1 use?

How many people report that? Not that many, AFAIK.

"GLP drugs cannot distinguish between nutrient-dense meals and the junk food binges you are trying to avoid."

This again goes against what people report - aversion to junk food so strong that McDonalds et al. consider this a potential threat to their business model.