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Your First 30 Days on a GLP-1
Nobody needs another list of things that might happen to them. This is a running order: what to sort out before your first dose, and what is worth your attention in each of the first four weeks — with the guide for each one, so you are reading the right thing at the right time rather than all of it at once.
Weeks are a rough map, not a schedule. People differ, and your prescriber’s plan beats anything on this page.
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Before your first dose
Get the boring parts out of the way
Almost everything that derails a first month is logistical rather than medical: a cost surprise, an empty fridge, or a question you meant to ask and forgot. This is the part you can do in an afternoon.
- Write down the questions you want to ask your prescriber — including what to do if a side effect gets bad, and how to reach someone between appointments.
- Find out the full cost before month two, not during it: the membership, the medication, and anything billed on top.
- Record a baseline you can compare against later — weight, a waist measurement, how your clothes fit, and what you can comfortably lift or walk. The scale alone will not tell you what you lose.
- Shop once, so that week one does not depend on cooking.
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Week 1
Eating becomes the hard part
The common early surprise is not hunger — it is that food stops being interesting, and that getting enough protein suddenly takes planning. Appetite changes before habits do.
- Aim to eat something with protein first, before the rest of the plate.
- Keep fluids up. It is easy to drink much less when you are eating less.
- Expect the first injection to feel like a bigger deal than it turns out to be.
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Week 2
Side effects, if they show up
Nausea, constipation and fatigue are the three most discussed. Having a plan before you need one is the difference between an annoying week and a week you consider quitting.
- Know in advance what you will eat on a day when nothing sounds good.
- Constipation is easier to prevent than to fix. Fluids and fibre, early.
- Keep a note of what you felt and when — it makes your next appointment far more useful.
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Week 3
Protect the muscle, not just the number
Weight coming off is not the same as fat coming off. This is the week to start resistance work, because the muscle you keep now is what defends the result later.
- Two short strength sessions a week is a real starting point, not a compromise.
- Keep protein steady across the day rather than in one meal.
- Track something other than the scale — a waist measurement, or what you can lift.
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Week 4
Build the version of this you can keep doing
The first month runs on novelty. The second runs on systems. What you want by now is a short list of meals you can make without deciding, and a realistic picture of what this costs.
- Cook once for several days — the days you most need food are the days you least want to cook.
- Re-check the price you are actually paying now that any introductory rate is ending.
- A slower month is normal, and is not the same as a plateau.
Get the free GLP-1 Protein Checklist
A one-page checklist to help protect your muscle while losing weight on a GLP-1 — daily protein targets by body weight, the best high-protein foods when your appetite is tiny, and the questions to ask your prescriber. Plus a three-week onboarding series (up to three emails a week), then one practical email each week. Unsubscribe anytime.
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Educational content for people already working with a prescriber. It is not medical advice, not a treatment plan, and not a substitute for the clinician who knows your history. See our editorial policy and medical disclaimer.