Why protein matters more on a GLP-1
GLP-1 medicines are a family of drugs that copy a gut hormone to lower appetite. Semaglutide, the ingredient in Ozempic and Wegovy, and tirzepatide, the ingredient in Mounjaro and Zepbound, are the two best known. They are made by Novo Nordisk and Eli Lilly. Zen IV Spa prescribes compounded versions of both, which are not FDA-approved.
When you lose weight by any method, some of what you lose is muscle, not just fat. In the STEP 1 trial of semaglutide, a sub-study using body scans found that about 40 percent of the weight lost was lean mass, which includes muscle. The SURMOUNT-1 tirzepatide trial had a similar pattern.
Losing muscle is a problem. Muscle keeps your metabolism up, keeps you strong, protects your bones, and helps control blood sugar. Protein plus strength training is the best-studied way to keep it while fat comes off.
How much protein you actually need
The standard daily recommendation for a healthy adult is 0.8 grams of protein per kilogram of body weight. That is a minimum to prevent deficiency, not a target for someone losing weight.
Research on weight loss and aging suggests a higher range: about 1.2 to 1.6 grams per kilogram of body weight per day. For someone who weighs 200 pounds (about 91 kilograms), that works out to roughly 110 to 145 grams of protein a day. Some clinicians use goal weight instead of current weight if the difference is large.
A simpler rule: aim for 25 to 30 grams of protein at each of three meals, plus one protein-rich snack. That puts most people in the right zone without doing math every day.
The problem: you are not hungry
The medicine makes small meals feel like big ones. Many patients tell us they forget to eat lunch. That is great for calories but bad for protein, because protein is usually the heaviest part of a meal.
The fix is to eat protein first. Before the salad, the bread, or the rice, eat the chicken, eggs, fish, tofu, or Greek yogurt. If you get full halfway through, you have already covered the most important part.
Nausea can make meat unappealing. On those days, lean on cold or mild options: cottage cheese, yogurt, a protein shake, hard-boiled eggs, or a simple bean soup.
Easy ways to hit your number
Breakfast: two eggs plus a cup of Greek yogurt is about 30 grams. A protein shake with milk gets you 30 to 40 grams in two minutes and goes down easy on queasy mornings.
Lunch and dinner: a palm-sized piece of chicken, fish, or lean beef is about 25 to 35 grams. A cup of cooked lentils is about 18 grams. A cup of tofu is about 20 grams. Add a side of beans or a cheese stick to bump any meal up.
Snacks: string cheese, jerky, edamame, a small can of tuna, or a single-serve cottage cheese each give 10 to 20 grams. Keep a few in the fridge so a good choice is the easy choice.
Protein powders and shakes
A protein supplement is not required, but it is a useful tool when your appetite is low. Whey, casein, egg, pea, and soy powders are all fine. Look for 20 to 30 grams of protein and under 5 grams of sugar per serving.
Shakes are not a replacement for food. Whole foods bring fiber, vitamins, and minerals that powders lack. Use a shake to fill a gap, not to replace every meal.
If you have kidney disease, check with your doctor before raising protein. For most healthy adults, 1.2 to 1.6 grams per kilogram is safe, and large reviews have not found harm to healthy kidneys at that level.
Pair protein with strength training
Protein gives your body the raw material to keep muscle. Lifting gives it the reason. Two or three short sessions a week of squats, push-ups, rows, or dumbbell work tells your body that muscle is needed and should not be burned for fuel.
Studies of older adults losing weight show that protein plus resistance exercise preserves far more muscle than either one alone. You do not need a gym; resistance bands at home work.
At Zen IV Spa, our clinical check-ins include questions about eating and movement. We would rather you lose a little slower and keep your strength than lose fast and feel weak.
Get support with your GLP-1 plan
If you are in New York or New Jersey and want a weight-loss plan that protects your muscle, start with a free video visit with our medical director. Compounded semaglutide is $199 per month and compounded tirzepatide is $299 per month, and a nurse can draw your labs at home. Learn more at /weight-loss/ or call (332) 239-2005.
Common Questions
What is a good daily protein goal on semaglutide or tirzepatide?+
About 1.2 to 1.6 grams per kilogram of body weight, or roughly 25 to 30 grams per meal plus a protein snack. Your prescriber can tailor it.
Can I eat too much protein?+
For healthy adults, intake in the 1.2 to 1.6 g/kg range has not been shown to cause harm. People with kidney disease should ask their doctor first.
Do I have to use protein shakes?+
No. They are a convenient option when you are not hungry or feel queasy, but whole foods are better for overall nutrition.
Why am I losing muscle on a GLP-1?+
All weight loss includes some muscle loss. In the STEP 1 sub-study about 40 percent of weight lost was lean mass. Protein and strength training reduce that.
What if meat makes me nauseous?+
Try cold or mild proteins: Greek yogurt, cottage cheese, eggs, tofu, beans, or a shake. Eat smaller portions more often.
Should I base the number on my current weight or goal weight?+
Either approach is used. If you have a lot of weight to lose, many clinicians use goal weight so the target is realistic.
Sources: FDA prescribing information for Wegovy (2024) and Zepbound (2024); STEP 1 trial and DXA sub-study, NEJM 2021; SURMOUNT-1 trial, NEJM 2022; NIH Dietary Reference Intakes for protein.
All treatments are medical services. Every guest is screened, and every treatment is prescribed by a licensed provider. Nothing on this page is medical advice for you personally, and the opinions summarized here belong to the doctors named, not to Zen IV Spa. Talk to a provider before starting or stopping anything.
