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

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

Semaglutide and tirzepatide copy hormones your gut already makes after a meal. Here's what those hormones do, why the medications quiet hunger and 'food noise,' what the second hormone in tirzepatide adds, and why 'it slows your stomach' explains both the appetite drop and the nausea.

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

The medication doesn't work like a switch. Here's the realistic arc: weeks of dose titration before much happens, roughly 1-2 lb of loss a week once you're up to dose, wide variation between fast and slow responders, an expected plateau, and the part people skip — it's a long-term treatment, not a course you finish.

How people actually get a prescription, step by step.

From your first conversation with a doctor to a prescription in hand, there are several decision points that shape your path — who prescribes it, what your insurance actually covers, and whether you go with a branded pen or a compounded product. Here's a step-by-step workflow through the whole process.

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.

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. Here's what to expect, what actually helps with nausea and constipation, and the red-flag symptoms that mean call a doctor now rather than wait it out.

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

GLP-1 medications don't replace the calorie deficit — they make it easier to sustain one, sometimes too easily. Here's what a deficit actually is, why it still matters on these medications, what a healthy range looks like, and how to calculate your own.

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 lean hard on the "calories in" side and leave "calories out" — four moving parts that all fall as you lose weight — up to you. Here's how the balance actually works and how to protect the side the medication ignores.

Why protein matters most when you're eating less.

GLP-1 medications shrink how much you eat overall, which makes what you eat matter more. Here's why protein, fat, and carbohydrates each play a distinct role — and where most people on these medications fall short.

Why hydration needs deliberate attention on a GLP-1.

Reduced appetite often means reduced fluid intake too, and GLP-1 medications raise the stakes on staying hydrated — affecting everything from nausea and constipation to a rare but serious kidney injury risk. Here's why hydration deserves deliberate attention, not an afterthought.

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.

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

A free calculator that estimates your total daily energy expenditure and macronutrient targets — a useful starting point for setting realistic calorie and protein goals on a GLP-1.

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 specific to you. Here's how to make that first conversation productive.

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 into the conversation before or during GLP-1 treatment can help you approach it more safely. Here's how to raise it.