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New to GLP-1? Start here: your step-by-step learning path

Just starting out with GLP-1 medications, or still deciding? This ordered path walks you from how these medications work through access, talking to your doctor, side effects, eating well, protecting muscle with movement, setting calorie and protein targets, and the mental and social side, one step at a time.

New to GLP-1 medications, or still deciding whether they're for you? There's a lot to take in, so this path puts the essentials in order. Start at the top and work down, or jump to whatever you need most right now; each step stands on its own.

How to use this path

The path starts with what these medications are and how they work, then what to expect over the first months, how people get a prescription, and how to prepare for the appointment with your doctor. Next come side effects and how to manage them. The middle steps cover eating well: what a calorie deficit is, the energy balance behind it, why protein matters when you're eating less, and hydration. After that come movement to protect your muscle, a calculator for setting realistic calorie and protein targets, and a guide to tracking whether you're losing fat or muscle. The path ends with two conversations: one with a dietitian or trainer about building a plan, and one with a mental health provider about body image or a history of disordered eating. That last part is easy to overlook.

You don't have to read these in order, and you don't have to read them all at once. Follow the steps below.

This is general education, not medical advice. Talk to your prescriber or a dietitian about what fits your situation.

Your path

14 steps

  1. Step 1
    How GLP-1 medications work, in plain language

    Start here — what these medications are and how they work.

    Semaglutide and tirzepatide copy hormones your gut already makes after a meal. This guide explains what those hormones do, why the medications quiet hunger and 'food noise,' what the second hormone in tirzepatide adds, and how the same signal that cuts appetite can also cause nausea.

  2. Step 2
    What to realistically expect on a GLP-1

    Timelines, results, and what "normal" looks like over the first months.

    A GLP-1 doesn't work like a switch. Expect weeks of dose titration before much happens, then average loss of roughly 1% of body weight a month in the big trials, wide variation between fast and slow responders, an expected plateau, and a treatment you plan to stay on long term.

  3. Step 3
    Getting started: how to access GLP-1 medications

    How people actually get a prescription, step by step.

    From your first conversation with a doctor to a prescription in hand, a few decisions shape your path: who prescribes, what your insurance covers, and whether you use a branded product (pen, vial, or pill) or a compounded one. This guide walks through each step in order.

  4. Step 4
    Talking to your doctor about GLP-1 medications

    How to prepare for the appointment and make it count.

    How to prepare for the appointment and the questions worth asking, so you get a productive conversation.

  5. Step 5
    Common GLP-1 side effects and how to manage them

    Nausea, constipation, and the red flags to watch for.

    Most GLP-1 side effects are digestive, worst right after a dose increase, and manageable with a few practical habits. What to expect, what helps with nausea and constipation, and the red-flag symptoms that mean you should call a doctor now.

  6. Step 6
    What a calorie deficit is, and how to find a healthy one for yourself on a GLP-1

    Eating well, part 1 — what a calorie deficit is and how to find yours.

    A GLP-1 medication makes a calorie deficit easier to keep, sometimes too easy. This guide covers what a deficit is, why it still drives weight loss on these drugs, what a healthy range looks like, and how to work out your own.

  7. Step 7
    Calories in, calories out: the energy balance behind a calorie deficit on a GLP-1

    The energy-balance mechanism underneath the deficit.

    A calorie deficit runs on one mechanism: the energy you take in versus the energy you burn. GLP-1 medications work mainly on the "calories in" side. "Calories out" has four parts that all tend to fall as you lose weight, and protecting them is up to you. This guide explains how the balance works and how to defend the side the medication doesn't touch.

  8. Step 8
    Why are protein, fat, and carbohydrates important?

    Why protein matters most when you're eating less.

    GLP-1 medications shrink how much you eat, which makes what you eat matter more. This guide covers the role each of protein, fat, and carbohydrates plays and where people on these medications most often fall short.

  9. Step 9
    Why hydration matters on a GLP-1: effects on weight loss and side effects

    Why hydration needs deliberate attention on a GLP-1.

    Eating less usually means drinking less, and on a GLP-1 that matters more than usual. Low fluid intake can worsen nausea and constipation and, rarely, lead to acute kidney injury. Here's what the evidence shows and how to stay ahead of it.

  10. Step 10
    Physical Activity Guidelines for Americans

    Protect muscle with movement and resistance training.

    The official U.S. guidance on how much activity, including muscle-strengthening work, adults should aim for each week. The 2nd edition (2018) is still the current version as of September 2026.

  11. Step 11
    TDEE Calculator

    Set realistic calorie and protein targets. Companion tools: Happy Scale, Cronometer, Shotsy.

    A free calculator that estimates how many calories you burn in a day, with a basic macronutrient split. On a GLP-1 it gives you a rough baseline for judging whether a much smaller intake is too low.

  12. Step 12
    DXA scans for tracking progress on a GLP-1: what they are, how they compare to BIA, and how to get one

    Track progress beyond the scale: whether you're losing fat or muscle, and when a DXA scan helps.

    The scale can't tell you if you're losing fat or muscle. A DXA scan can. This guide covers what a DXA scan measures, how it compares to BIA devices like Seca and InBody (including home scales), how often to get one, and where to get scanned.

  13. Step 13
    Talking to a dietitian or trainer about building a plan around GLP-1 treatment

    Turn general advice into a plan built for you.

    A dietitian or trainer can turn general advice about protein and strength training into a plan built around your appetite, your dose, and your goals. What to bring and what to ask so the first appointment is worth it.

  14. Step 14
    Talking to a mental health provider about body image or disordered eating history before treatment

    The mental and social side — see the full "talking to…" cluster.

    If you have a history of body image struggles or disordered eating, bringing it up before or during GLP-1 treatment can help you approach it more safely. This guide covers when to raise it, what to share, and what to ask.