Does How We Lose Weight Matter?

The response to GLP-1 drugs has exposed a strange tension in how we think about weight loss. On one side, people who have lost weight through diet, exercise, and changes to their lifestyle can sometimes act as though they earned their result in a way that people using medication did not. On the other side, criticism of drugs like semaglutide or tirzepatide is often dismissed as moral judgment, as though the only reason someone could prefer weight loss without medication is because they think fat people should suffer for becoming fat. I don't think either position gets very far.

There has always been a tendency to treat body weight as evidence of character, as though being lean proves discipline and being fat proves some kind of personal failure. I don't think that is a useful way to look at people, and I'm not interested in arguing that somebody who loses weight without medication is therefore a better person than somebody who uses a GLP-1. At the same time, I don't think it follows that the way somebody loses weight is irrelevant.

Part of my bias here is obvious. I work in an industry where behavior matters. I've also gone through the process of losing weight without medication, so I understand that I am naturally going to place value on what that required from me. But even after accounting for that bias, I still think there is something different about changing the conditions and behaviors that contributed to a problem compared with using a drug that allows you to reach a similar outcome while leaving many of those things unchanged. That difference is where I think some of the conversation about morality gets confused.

Morality has to show up somewhere in behavior. We generally judge honesty by whether someone tells the truth, responsibility by whether someone takes responsibility, courage by what somebody does in situations where courage is required. These things aren't simply ideas somebody carries around internally. They are expressed through behavior, and repeated behavior eventually contributes to the kind of person somebody becomes.

Weight loss can require some of those same qualities. You may have to regulate what you eat when you would rather keep eating, change the food you keep around the house, move when you don't particularly feel like moving, learn how food affects you, prepare meals differently, tolerate hunger occasionally, build routines, recover from mistakes, and continue doing those things for long enough that the way you live actually changes. I don't think doing those things makes you morally superior to somebody else, but I do think those behaviors can develop qualities that I respect.

That is why, if you give me two hypothetical people who both need to lose 100 lbs, I don't view their paths as interchangeable simply because the scale eventually shows the same number. One person may spend a year or two changing how he eats, becoming more active, learning how to train, changing what food is available around him, learning how much he actually needs to eat, dealing with hunger and setbacks, and eventually reaching a point where his daily life looks very different from the one that helped him become obese. The other person may begin taking a GLP-1, experience a large reduction in appetite, eat substantially less without having to fight the same degree of hunger, lose the same 100 lbs, and make relatively few changes to the rest of his life.

The second person still lost the weight, and the result is real. He may improve his blood pressure, glucose levels, mobility, sleep, and other parts of his health as a consequence. I don't think any of that should be dismissed. I still respect what the first person did more, and I don't think saying that requires me to believe the second person has less human worth. I'm judging what each person had to do in response to the problem, and equal human worth doesn't require me to admire every way of solving a problem equally.

The complication is that those aren't the only two possibilities. Somebody could use a GLP-1 while completely changing the way he eats, beginning to exercise, becoming more active, and learning how to manage his health in ways he never had before. Somebody else could use the drug as the entire strategy. Those seem meaningfully different, which is why I have much less of a problem with the first person than the second. What concerns me most is when the drug becomes a replacement for participating in your own health.

GLP-1 drugs make this question particularly interesting because they are sometimes discussed as though they are simply another tool. The argument usually goes something like this: we don't criticize people for using washing machines instead of washboards, calculators instead of doing arithmetic by hand, or cars instead of walking everywhere, so why should we criticize someone for using a medication that makes losing weight easier? I understand the comparison. Human beings use technology constantly to remove unnecessary difficulty from our lives. I don't think making something easier automatically makes it worse, and I don't think difficulty has some magical moral value.

The washing-machine comparison breaks down for me because washing clothes is an external task. Human beings don't have a physiological capacity for washing clothes that we need to maintain for our health. Using a machine to wash my clothes doesn't change the way my appetite functions, affect the amount of muscle I carry, alter my cardiovascular fitness, change my ability to regulate food intake, or make my health dependent on continued use of the machine. A GLP-1 is different because it acts on physiology.

Drugs such as semaglutide and tirzepatide alter the biological signals involved in appetite and satiety, which can make it considerably easier for someone to eat less. That can be extremely useful, but it also means the medication is participating directly in a regulatory process that the person would otherwise have to manage through some combination of physiology, behavior, and environment. The medication isn't simply removing unnecessary labor from an unrelated task.

I feel like this matters because I keep coming back to health as a capacity rather than simply a collection of outcomes. Body weight is one outcome. Blood pressure, glucose, cholesterol, and body fat are outcomes. They matter, but I don't think they completely describe whether somebody is healthy. I also care about what the person is capable of regulating and maintaining, what his body can tolerate, how well he functions, how he responds to stress, whether he can move and produce force, and whether the behaviors that support those things have actually become part of his life. Two people can therefore arrive at the same body weight while arriving there with different capacities.

The comparison I keep thinking about comes from training. Imagine two people who can both bench press 405 pounds. One trained naturally for years to reach it. The other used large amounts of anabolic steroids and reached the same strength much faster. Both still benched 405 pounds. The bar doesn't care how they got there. But most people who understand training would hesitate to say that the two paths tell us exactly the same thing.

The person using anabolic drugs received a pharmacological advantage that changes the rate at which muscle and strength can be gained. They may also be accepting physiological risks associated with those drugs. The faster increase in muscular force can create its own problems if other tissues haven't adapted at the same rate, and if the drugs are removed, the conditions supporting the result change. None of that means the strength is imaginary. It means the result cannot be separated completely from the method that produced it.

I think weight loss works in a similar way. If somebody changes what he eats, becomes more active, gains or preserves muscle, improves aerobic capacity, restructures his food environment, and develops greater control over his own behavior, those changes have effects beyond the number he sees on the scale. If somebody reaches the same scale weight primarily because a medication has suppressed his appetite enough for him to eat less, that doesn't make the weight loss fake. It means I don't automatically consider the two states identical simply because the outcome we are measuring happens to be the same. The process changes the person and the organism along the way.

This is also where my broader concern about our relationship with technology comes in. Humans have created an environment that makes many of the behaviors required for health increasingly optional. We can avoid movement almost completely. We can have food delivered without leaving the house. Food can be available continuously, in forms specifically designed to be easy to eat and difficult to stop eating. We can stay indoors for most of the day, remain under artificial light late into the night, sit for hours at work, and structure most of daily life around convenience.

Many behaviors that would once have occurred as a normal consequence of being alive now have to be deliberately reintroduced. In that sense, I sometimes think of modern life as a kind of captivity of our own construction. I don't mean that literally, and I don't think modern life is uniformly bad. I mean that we have engineered away many of the constraints and physical demands that human physiology developed within, and then we increasingly rely on additional technology to compensate for some of the problems that emerge from the environment we created.

GLP-1s can fit into that pattern. If somebody lives in an environment where he repeatedly overeats, moves very little, has constant access to highly palatable food, sleeps poorly, and has become obese, a drug that substantially reduces appetite may help him lose a large amount of weight without requiring him to alter many of those conditions. That may still make him medically better off.

There may also be people for whom medication is the best available option. Someone with severe obesity who has repeatedly tried to lose weight, has significant health problems, and is struggling to function may reasonably decide that medication gives him a chance to get out of a situation he has not been able to change on his own. I don't think refusing useful treatment simply to prove that you can do something without help is automatically virtuous.

My concern begins when pharmaceutical compensation becomes the first or only answer to a problem that could reasonably involve changing the conditions producing it, particularly when those changes would improve several parts of someone's health at the same time. The further we move toward needing an external pharmaceutical input to perform a regulatory function we would otherwise have to develop or maintain ourselves, the more dependent that outcome becomes on the intervention.

That dependence becomes relevant when we ask what happens if the intervention disappears. GLP-1 medications can produce substantial weight loss while they are being used, but many people regain weight after stopping them. That doesn't necessarily mean they failed morally or learned nothing. Weight loss itself can produce biological pressures toward regain, including increased hunger and changes in energy expenditure. Still, if the person's environment, routines, food choices, activity, and ability to regulate intake remain mostly unchanged, then removing the thing that was suppressing appetite predictably leaves many of the original conditions in place.

That is why I hesitate to describe medication alone as a complete solution. It can solve part of the problem. It can reduce body weight and improve some of the consequences associated with obesity. It may create enough space for someone to begin changing the rest of his life. What it cannot guarantee is that the person develops the capacities required to maintain those changes without the drug.

That brings me to the argument that obesity is a disease. I understand why people use that language. Excess body fat can contribute to real physiological dysfunction and disease, and severe obesity can clearly impair someone's ability to function. I also don't think the fact that a condition responds to changes in environment automatically proves that it isn't a disease. Plenty of medical conditions are caused or aggravated by environmental exposures.

Where I become hesitant is when the disease label is used as though it settles the question of causation or removes behavior from the discussion. If somebody becomes obese in an environment with constant food availability, little required movement, poor sleep, highly processed food, and routines that encourage overeating, then those conditions still belong in the explanation. Genetics can affect how susceptible someone is to that environment. Physiology can make losing weight harder for one person than another. None of that makes the environment or the person's behavior irrelevant.

I also don't think every person with excess body fat is necessarily in the same physiological state. Someone can carry more body fat while remaining relatively functional and metabolically healthy for a period of time, while someone else may already have impaired glucose control, sleep apnea, joint problems, limited mobility, cardiovascular disease, or other consequences associated with obesity. Simply placing both people under one label doesn't tell me everything I need to know about their health.

The issue of suffering sits underneath a lot of this too. Critics of people who prefer weight loss without medication sometimes describe that preference as though they believe weight loss should be painful. The implication is that people want someone with obesity to grind through misery as punishment for having gained weight in the first place. I don't believe that, and I also think "suffering" gets used too loosely in these discussions.

Eating less than you want to eat can be uncomfortable. Going for a walk when you would rather sit down can be uncomfortable. Training can be uncomfortable. Learning to cook when ordering food is easier can be inconvenient. Saying no to something you want in the moment can be frustrating. Changing a familiar way of living can feel much harder than continuing it, but that's different from saying the person is being harmed by the process.

Meanwhile, remaining significantly overweight can involve its own form of suffering: aching joints, difficulty moving, getting winded easily, poor sleep, reduced physical capacity, metabolic disease, and feeling trapped in a body that doesn't function the way you want it to. People can become comfortable with what they know even when what they know is making them miserable. The discomfort of changing may feel worse initially because it is unfamiliar.

I don't think discomfort automatically has moral value. Making something harder for no reason doesn't improve it. Starving yourself unnecessarily isn't admirable. Training through an injury isn't admirable. Refusing medication when you genuinely need it doesn't prove character. I place value on challenge when going through it develops a capacity you actually need.

That is where my view of health starts to shape how I think about all of this. You don't simply acquire health once and then possess it regardless of what you do. You are born with a body that has an enormous amount of biological capacity, and what happens to that capacity over time is influenced by age, genetics, environment, disease, and behavior. Some capacities decline eventually because aging is real. Others can improve considerably through what you do.

You can become stronger. You can improve aerobic fitness. You can improve insulin sensitivity. You can gain muscle and bone. You can improve movement. You can become better at regulating your behavior and arranging your environment so that those behaviors are easier to maintain. I think there is value in deliberately developing and maintaining those capacities while you are able to.

That is why I have much less of a problem with somebody who uses a GLP-1 with the expressed intention of changing his lifestyle at the same time. The medication may reduce appetite enough for him to get traction. Losing weight may allow him to move without pain. Improved mobility may allow him to start exercising. Training may help him build muscle and improve cardiovascular fitness. Learning how to eat differently while the medication makes appetite easier to manage may give him skills that remain useful later. In that situation, the drug is participating in a larger process.

Where I become uncomfortable is when the intervention becomes the process. If somebody's entire approach to weight loss becomes taking something that makes him eat less while the behaviors, environment, and physical capacities surrounding the problem remain essentially untouched, then I think we have started confusing improvement in one measurable outcome with health more broadly.

That doesn't mean the person is bad, the weight loss is illegitimate, or the medication has no medical value. It means I place more value on a process that leaves somebody increasingly capable of participating in and regulating his own health than on one that leaves those capacities largely undeveloped and makes the result heavily dependent on an outside intervention.

There is probably a moral component to that belief because agency, responsibility, behavior, and character are moral questions to some degree. I don't think that requires condemnation. I can respect somebody as a person, understand why he chose medication, agree that the medication improved his condition, and still think the way we choose to respond to problems contributes to the kind of person we become.

How we repeatedly solve problems shapes us, although I don't think one choice tells me everything about somebody. Sometimes the right solution is technological or pharmaceutical because the problem exceeds what we can reasonably handle ourselves. Sometimes outside intervention gives someone the ability to begin doing things he previously couldn't do. I don't want a philosophy so rigid that it cannot account for those situations, but I also don't want a philosophy of health where every human capacity can be replaced by an external intervention as long as the numbers look better afterward.

If the behaviors required to maintain health are still within our reasonable capacity, I think there is something worth preserving in continuing to develop and exercise them. That doesn't make every pharmaceutical intervention wrong, but it does change what I think the intervention should be doing within the larger process of becoming and remaining healthy.