Care led by Zahida Samat, MSN, AGNP-C
Quick answer: To protect muscle on a GLP-1 medication, eat 1.2 to 1.6 grams of protein per kilogram of body weight daily, drink about 64 to 96 ounces of fluid, and do strength training 2 to 3 times per week. Find your personal protein goal with the free Z&Z Wellness Protein Intake Calculator.
GLP-1 medications like semaglutide (Wegovy) and tirzepatide (Zepbound) quiet food noise and help the scale move. But the goal was never just a smaller number. The goal is to lose fat while keeping the muscle that powers your metabolism, protects your bones, and keeps you strong as you age.
Here is what the research shows. In the STEP 1 trial, roughly 40% of the weight lost on semaglutide was lean tissue. In SURMOUNT-1, about 26% of the weight lost on tirzepatide was lean tissue. Muscle loss is not a reason to avoid these medications. It is a reason to support your body while you take them.
In 2025, four leading medical organizations (the American College of Lifestyle Medicine, the American Society for Nutrition, the Obesity Medicine Association, and The Obesity Society) released joint guidance on nutrition during GLP-1 therapy. Adequate protein and strength training to preserve lean mass is one of their core priorities.
At Z&Z Wellness in Alexandria, Virginia, we focus on three pillars: protein, hydration, and strength.
Pillar 1: Protein protects your muscle
When appetite drops, protein is usually the first thing to slip. Your body then pulls protein from muscle to meet its needs.
The 2025 joint advisory recommends 1.2 to 1.6 grams of protein per kilogram of body weight per day during active weight loss. That is well above the standard 0.8 g/kg most adults hear about. Your provider may adjust your target based on your age, kidney health, and goals.
Find your number in 30 seconds. Use our free Protein Intake Calculator to get your personal daily protein goal. Bring the number to your next visit and we will fine-tune it together.
Make it doable when you are not hungry:
Eat protein first at every meal, before carbs or vegetables.
Spread it out: aim for about 25 to 35 grams per meal instead of one big serving.
Choose easy, dense options: Greek yogurt, cottage cheese, eggs, chicken, fish, tofu, lentils.
Use a protein shake when solid food feels like too much.
Set a phone reminder to eat. GLP-1s can make you forget meals entirely.
Pillar 2: Hydration keeps you feeling well
GLP-1 medications can quiet thirst the same way they quiet hunger. You also take in less water from food when you eat less. Dehydration can cause fatigue, headaches, dizziness, and constipation, and in more serious cases it can strain the kidneys.
Simple hydration habits:
Most adults do well with about 64 to 96 ounces of fluid a day, unless your provider gives you a different target.
Sip all day. Big gulps can worsen nausea.
Add electrolytes on workout days, hot days, or if you have vomiting or diarrhea.
Check your urine: pale yellow is the goal.
Pair water with a habit, such as a glass with every meal and every medication dose.
Call us if you feel dizzy when standing, notice very dark urine, or cannot keep fluids down. Our IV hydration services can help you recover when you fall behind.
Pillar 3: Lift weights to tell your body to keep muscle
Protein gives your body the building blocks. Strength training tells your body to use them. Research on weight loss consistently shows that resistance training, more than cardio alone, helps protect lean mass.
A simple starting plan:
2 to 3 full-body sessions per week, 20 to 40 minutes each.
Focus on big movements: squats or sit-to-stands, wall or knee push-ups, rows with bands or dumbbells, glute bridges, and carrying groceries or dumbbells.
Start light. Choose a weight you can lift 10 to 12 times with good form, then slowly increase.
Keep walking on the other days for heart health and digestion.
Eat a small protein snack 60 to 90 minutes before you train so you do not feel shaky.
Start on day one. It is easier to protect muscle than to rebuild it later. If you have joint pain or have never lifted, ask us about a safe starting point at your visit.
Your daily GLP-1 checklist
Protein: Hit your number from the Protein Intake Calculator. Easy win: protein first at every meal.
Hydration: About 64 to 96 oz a day, pale yellow urine. Easy win: a glass of water with every meal.
Strength: 2 to 3 sessions per week. Easy win: 20 minutes of squats, rows, and push-ups.
Frequently asked questions
How much protein do I need on semaglutide or tirzepatide? Most adults on GLP-1 therapy do best with 1.2 to 1.6 grams of protein per kilogram of body weight per day, based on 2025 guidance from four national obesity and nutrition organizations. Use the Protein Intake Calculator for your personal number.
Do GLP-1 medications cause muscle loss? They can. In clinical trials, about 26% to 40% of weight lost was lean tissue. Eating enough protein and doing regular strength training are the best-supported ways to protect muscle.
How much water should I drink on a GLP-1? Most adults do well with about 64 to 96 ounces of fluid per day. GLP-1 medications can reduce thirst, so sip throughout the day and add electrolytes when you exercise or feel unwell.
What kind of exercise is best on GLP-1 therapy? Strength training 2 to 3 times per week is the priority, because it signals your body to keep muscle. Add walking on other days for heart health and digestion.
Where can I get GLP-1 weight loss in Alexandria, VA? Z&Z Wellness offers medically supervised semaglutide and tirzepatide programs at 114 Pepperell St, Alexandria, VA 22304, with personal protein, hydration, and strength guidance. Book a medical evaluation.
You are not doing this alone
At Z&Z Wellness in Alexandria, VA, our GLP-1 weight loss program pairs semaglutide or tirzepatide with the support that protects your results: personal protein targets, hydration guidance, and a plan to keep you strong. Your provider checks in on how you feel, not just what you weigh.
Ready to start? Calculate your protein goal, then book your medical evaluation.
This article is for education only and is not medical advice. Talk with your provider before changing your diet, fluids, or exercise, especially if you have kidney, heart, or joint conditions.
Z&Z Wellness · Alexandria, VA 22304 · Serving Alexandria and Northern Virginia
Sources: Nutritional Priorities to Support GLP-1 Therapy for Obesity, joint advisory from ACLM, ASN, OMA and TOS (2025); STEP 1 trial body-composition substudy (semaglutide); SURMOUNT-1 trial body-composition substudy (tirzepatide).
