What to eat, what to expect, and how to protect your muscle while losing fat. Week by week.
Daily fundamentals
Protein first, every meal
Aim 25–40g per sitting to preserve muscle
Electrolytes, not just water
Nausea + reduced eating depletes sodium and potassium
Fiber daily
Prevents constipation — GLP-1 slows your gut
Cold food beats hot
Room temp or cold is easier on a nauseated stomach
Small meals, often
5-6 small meals beats 3 large ones in week 1
Sleep is a weight loss tool
Under 7 hours raises cortisol and stalls fat loss
What to expect
Your appetite may drop noticeably within 24 hours. Nausea is common on days 1–2 — this is the medication working, not a side effect to push through. The goal this week is to tolerate food, not optimize it.
What to eat on dose day (Day 1)
Keep it small, bland, and soft. Think plain crackers, white rice, broth, toast, or a banana. Avoid fatty or spicy meals — they amplify nausea. Even if you're not hungry, try to eat something every 4–5 hours.
Days 2–4: the suppression peak
Appetite is at its lowest. Prioritize protein above everything else — muscle loss accelerates when calories drop. A protein shake (20–30g) counts. Aim for at least 60–80g protein per day even if eating very little.
Days 5–7: appetite returns
You'll notice your hunger creeping back. This is normal — GLP-1 levels are waning before your next dose. Use this window to eat a balanced meal with protein, fiber, and complex carbs.
Hydration
Nausea makes it easy to forget fluids. Aim for at least 8 glasses of water. Electrolytes help — add a pinch of salt to water or use a low-sugar electrolyte mix if plain water isn't sitting well.
Your cycle is becoming predictable
By now you've experienced one full 7-day cycle. The pattern is: suppression peak on days 1–3, gradual return days 4–5, normal appetite days 6–7. Your meal plan should mirror this rhythm.
Protein is non-negotiable
The biggest risk of GLP-1 weight loss is losing muscle alongside fat. To protect lean mass, target 0.7–1g of protein per pound of goal body weight daily. High-protein meals on days 5–7 (when you can eat) help compensate for low-protein days 1–2.
Fiber
Constipation is a very common side effect — GLP-1 slows gut motility. Aim for 25–35g fiber daily. Vegetables, legumes, oats, and chia seeds all help. If constipation is severe, a magnesium glycinate supplement at night is gentler than laxatives.
What to avoid
Alcohol hits harder on GLP-1 — your tolerance drops. Ultra-processed food and fast food amplify nausea and often trigger GERD. Carbonated drinks can increase bloating. None of these are banned, but they're worth minimizing in weeks 1–4.
Nausea is still here — here's what works
Ginger (tea, capsules, or chews) is the most evidence-backed natural remedy. Eating cold or room-temperature food is easier on a sensitive stomach than hot meals. Small, frequent meals outperform three large ones. Peppermint tea after eating helps for some people.
GERD and reflux
GLP-1 slows stomach emptying, which increases reflux risk. Eat your last meal at least 3 hours before bed. Elevate the head of your bed if nighttime reflux is a problem. Avoid lying down after meals.
Hair thinning
Rapid calorie restriction — not the medication itself — causes telogen effluvium (temporary hair shedding). It typically starts at weeks 8–12. The fix is adequate protein now, before it starts. Biotin supplements have limited evidence but are low-risk to try.
Fatigue
Under-eating calories and under-sleeping compound each other. If you're feeling exhausted, check that you're hitting minimum calorie thresholds (at least 1,200 kcal for women, 1,500 for men even on suppression days) and getting 7–8 hours of sleep.
When to call your provider
Vomiting that prevents keeping any food down for 24+ hours, severe abdominal pain (not just nausea), rapid heart rate, or signs of dehydration are reasons to contact your prescriber. Most side effects are manageable but some warrant a dose adjustment.
Your first check-in
By end of week 4, most people have lost 2–5 lbs. Some lose more, some less. The medication is working even when the scale doesn't move — your body is recomposing. Track how your clothes fit and how your energy feels, not just weight.
Resistance training
Adding even 2 sessions per week of resistance training is the single highest-leverage thing you can do while on GLP-1. It signals to your body to preserve muscle during the deficit. Bodyweight, bands, or weights all count.
Nutrients to watch
On reduced calories, deficiencies creep in. Iron, B12, zinc, vitamin D, and calcium are the most common gaps on a GLP-1 diet. A high-quality multivitamin covers most of these. If you're on Wegovy or a semaglutide program, your provider may order labs at week 4–8.
Your meal pattern is becoming a habit
By now you've completed 3–4 injection cycles. The pattern — light and bland on dose days, protein-forward on peak appetite days — should feel natural. Use your DoseMeals dashboard to track which recipes feel best at each phase.
What comes next
Months 2–3 are typically when GLP-1 effects plateau as your dose increases. Keep protein high, maintain resistance training, and talk to your provider about dose titration. Most people reach their target dose at month 4–6.
Meals matched to your exact injection day and suppression cycle — updated every week.
Go to my dashboard →This guide is for informational purposes only and is not medical advice. Always follow the guidance of your prescribing provider.