Why Did My Weight Loss Stall on a GLP-1? Muscle, Labs, and Inflammation

Check your labs. Sophia Viner said this goes for every patient who is not feeling well on a GLP-1: come in, check labs, and see what is going on with nutrients and vitamins, because deficiencies can create problems. She opened the episode with a case that shows the pattern. A woman between 40 and 50 doing weight loss therapy elsewhere lost weight for about six months, then stopped losing and started complaining of a lot of fatigue. Her labs showed low B12, low vitamin D and a raised CRP, her InBody scan showed muscle mass coming off instead of weight, and she was not eating enough protein. Sophia Viner's advice is to keep protein, fiber and weight-bearing exercise in the plan alongside the lab work.

With CRP, C-reactive protein, a marker measured in blood. Sophia Viner said CRP can reflect inflammation in the blood vessels or anywhere else in the body, and that when someone starts a GLP-1 with a raised CRP, repeating the marker shows whether the medication is bringing that inflammation down.

Not when the person is doing their part, according to Sophia Viner. She said a GLP-1 is not a magic wand and only works if the person puts the same amount of work in, and elsewhere in the episode she describes that work as diet, exercise and lifestyle. She also pointed out that weight gain has hormonal and neurological drivers, including thyroid and sex hormones.

It depends on where they start. Sophia Viner said that includes their inflammation markers, what their thyroid is doing, and their gut health, so someone with severe dysbiosis may react differently from someone whose gut is healthier. A stool test is how they find that out.

Some people do report it. Sophia Viner said some people report feeling fatigued the day following an injection, and that the fatigue then passes. She also said that with a GLP-1, as with any medication, some people experience side effects, some experience more and some have none at all, so what any one person gets is not known until they try it.

It signals the pancreas to release insulin as blood glucose rises, so the glucose can be metabolized. A viewer asked in the live Q&A whether a GLP-1 can cause pancreatitis, and Sophia Viner's answer was hedged: she said people can have pancreatitis in some cases, and that maybe someone who had a history of pancreatitis is maybe not a good candidate. The episode is educational only and is not personal medical advice, and it tells anyone with severe abdominal pain, persistent vomiting, signs of dehydration, symptoms of gallbladder disease, or rapidly worsening symptoms on a GLP-1 to seek medical care.

Sophia Viner would not answer that one on air. A viewer asked it in the live Q&A, and she said it needs a fuller evaluation, including how long the weight took to come back and what the person is taking, so she asked that viewer to come in and see her instead. What she would say generally is that people become very vitamin deficient after a gastric sleeve, so vitamins and nutrition matter a great deal.