Millions of people have turned to weight loss injections as what looks like a miracle solution, but a cellular and molecular biology expert is warning that the treatment carries a steep hidden cost that few users fully understand before starting.
Dr. Ziv Av explains that drugs like Ozempic and Wegovy belong to a class of medication known as GLP-1 agonists, which mimic a natural hormone that slows stomach emptying, signals fullness to the brain, and triggers insulin release. The catch is that while the body's own version of this hormone acts for only about two minutes at a time, the injected version stretches that effect out across an entire week, a dramatic shift in hormonal signaling that Dr. Av says exacts a real physiological price.
The core problem, according to Dr. Av, is that the drugs never actually treat the underlying metabolic dysfunction that caused the weight gain in the first place. They simply suppress hunger, functioning as a patch rather than a cure. Once someone stops the treatment, a body that has effectively been starving demands rapid compensation for the calorie deficit. Research cited in the report shows that within the first year after stopping, patients regain roughly forty eight percent or more of the weight they lost, and they regain it faster than they would after a conventional diet. That rebound pattern helps explain why about half of users quit the drug within a year and roughly seventy percent quit within two years, driven by severe gastrointestinal side effects like constipation, diarrhea, and nausea, along with fatigue, high cost, and a general drop in motivation.
Perhaps the most serious risk Dr. Av flags is the loss of muscle and bone mass that accompanies the weight loss. As an illustration, he notes that if a sixty five year old woman loses twenty kilograms on the injections, as much as eight kilograms of that could be muscle and bone rather than fat, a loss that accelerates aging and severely damages quality of life at that age. The rapid loss of muscle and fat around the buttocks has become common enough that it has earned its own nickname, the chair crisis, referring to people who now find it painful to sit on hard chairs and have driven a spike in sales of seat cushions. Muscle tissue burns the majority of the body's energy, so losing it is also a central reason the weight comes back so quickly once treatment stops.
The effects reach beyond the digestive system and into the brain's reward circuitry. Real time brain scans show a significant drop in dopamine release on the medication, which is part of why fast food becomes far less appealing to users. For someone trying to break free of alcohol or nicotine dependency, that could be a welcome side effect, since the brain relies on a single reward mechanism for all of these drives. But suppressing that mechanism also causes many users to lose interest and desire in things that once brought them pleasure, from relationships to social life, leading to an overall drop in motivation for living that can feel like depression.
None of this means the treatment has no place. Dr. Av is clear that for people with severe obesity and a history of heart disease or stroke, the injections can be lifesaving, cutting the risk of a further cardiac event by roughly twenty percent. He notes, though, that a Mediterranean diet alone lowers that same risk by fifty to seventy percent. For anyone who does choose to use the medication, he lays out two non-negotiable rules to avoid long term physical decline: maintaining adequate protein intake and sticking to a regular strength training routine to preserve muscle mass.
The bottom line, in Dr. Av's assessment, is that there is no magic fix. Maintaining a healthy weight remains a legitimate health goal, but anyone looking to shed only a few kilograms would do well to consider lifestyle based approaches before turning to medication.
