Starting out: a kind orientation

If you read nothing else

You are probably here because something has been prescribed, or is about to be, and the internet has been no help at all. That is how almost everybody arrives. Esi, who holds the new-members circles, says the single most relieving sentence she gets to say is that nobody understands this at the start — not the confident people in the comments, not you, not most of us in our first month.

So here is the orientation, written the way we would say it to you sitting down with a cup of tea going cold between us.

These medicines work slowly and they work on appetite and digestion, which means the first weeks feel like your body has changed the subject without telling you. Most side effects that arrive early settle. Some do not, and there is a small, specific list of symptoms that mean you stop guessing and get seen the same day — we keep that list at when a symptom needs a clinician and we would rather you read it now, while nothing is wrong, than at three in the morning while something is.

You are not behind. There is no schedule you are failing. People here have started, stopped, restarted, gone up slowly, stayed on one step for a year, come off entirely and come back. All of those are ordinary shapes.

What these medicines are, plainly

GLP-1 is a hormone your own gut releases after you eat. Among other jobs it nudges insulin release when glucose is high, damps down glucagon, slows how fast the stomach empties, and signals to parts of the brainstem and hypothalamus that food has arrived. Semaglutide and liraglutide are engineered to imitate it and to hang around far longer than the natural hormone does. Tirzepatide does that and also acts at the GIP receptor, a second incretin pathway. Retatrutide, still in trials, adds a third.

That is the whole mechanism in a paragraph, and it explains nearly every effect people report. Slower stomach emptying is why you feel full early and why reflux and burping turn up. Appetite signalling is why the constant background negotiation about food quietens for many people — the thing members here call food noise. Glucose-dependent insulin release is why hypoglycaemia is uncommon on these drugs alone, and why it becomes a real concern if you also take insulin or a sulfonylurea.

If you want the longer version with the receptor detail and the trial history, we wrote it out properly. You do not need it in week one.

The shape of the first few months

Broad strokes, from several hundred people describing the same territory in our first-twelve-weeks circle. Yours will differ in the details and that is not a warning sign.

• Week one. Often quieter than you feared. Some people feel nothing at all and worry the injection did not work. It did; the drug accumulates over several weeks.
• Weeks two to four. Appetite change becomes noticeable. Nausea, if it comes, often lands in the two or three days after a dose. Constipation begins its long unglamorous career.
• Each step up. Many people get a repeat of the early symptoms for a few days after a dose increase, then settle. Tomás describes it as paying the same small tax each time.
• Weeks six to twelve. Fatigue is common and under-discussed. So is the odd, disorientating experience of not being interested in a meal you have loved for twenty years.
• Somewhere in the first months. Something non-scale usually shifts first: sleep, ankles, blood pressure at the pharmacy machine, stairs, a ring turning again.

There is a whole guide on this in detail at what to expect in the first twelve weeks.

What the trials actually showed

We link our sources because vague confidence is how people get hurt. The two largest weight-management trials are worth knowing about in outline.

In STEP 1 (Wilding, New England Journal of Medicine, 2021), adults taking semaglutide 2.4 mg weekly alongside lifestyle support lost on average about 14.9 per cent of body weight over 68 weeks, against about 2.4 per cent on placebo. In SURMOUNT-1 (Jastreboff, NEJM, 2022), tirzepatide over 72 weeks produced average reductions from roughly 15 per cent at the lowest dose to around 21 per cent at the highest, against about 3 per cent on placebo.

Two things to hold at once. Those are averages, and the spread around them is wide — trial populations contain people who lost very little. And both trials were about 15 to 18 months long, which is not the same as a life. When people ask us what happens in year four, the honest answer is that the trial evidence thins out sharply and we are all partly improvising.

Beyond weight, SELECT (Lincoff, NEJM, 2023) found fewer major cardiovascular events in people with existing cardiovascular disease and overweight or obesity but not diabetes, and FLOW (Perkovic, NEJM, 2024) found slower progression of kidney disease in people with type 2 diabetes and chronic kidney disease. Those are outcome trials, not weight trials, and they are the reason a lot of clinicians now think about these drugs differently.

The things members wish someone had said on day one

Collected from our just-starting circle over two years. This is not trial evidence — it is what a few hundred people have found, which is a different and still useful kind of knowledge.

• Drink before you are thirsty. Half the early headaches in this community turn out to be fluid, not the drug. See headaches and hydration.
• Sort constipation early rather than heroically late. Everyone who waited regrets waiting.
• Protein gets hard exactly when it matters most. Protein without a chore is the least preachy version we could write.
• Keep loading your muscles through the bad weeks, even badly. Ren’s whole position is that strength is the part you keep.
• Write things down. A five-line note beats a perfect diary you abandon — see the diary guide.
• Decide in advance who you are telling, if anyone. Telling people, or not exists because that question ambushes people.
• Injection anxiety is extremely normal and responds well to boring, graded practice with someone on a call with you.

What to have in the house before you begin

Nothing here is essential and none of it needs to be bought new.

• Somewhere sensible in the fridge that is not the door and not against the back wall. What goes in your fridge covers the cold chain.
• A sharps bin, obtained before your first dose rather than after it. Sharps disposal has the regional detail.
• Fluids you will actually drink, including something salty and something warm.
• Two or three foods that are easy when nothing appeals. Not a plan, not a list of rules — just something in the cupboard for the days described in eating enough when nothing appeals.
• Paracetamol, or whatever your clinician has said is fine for you, for the first-week headache.
• The phone number of your prescribing service written somewhere you can find it while feeling awful.

How to use this community

Start at start here, which is short. Then pick one circle rather than five — most people do best in just-starting or first-twelve-weeks for the first month, and add a symptom circle if a symptom becomes the main event.

Our community agreements are worth two minutes of your time. The short version: nobody gives dose advice, nobody posts a target number, nobody is shamed for stopping or for a bad week, and food is never described as good or bad. Facilitators are peer-support trained volunteers, not clinicians, and will not tell you what to do with your body.

If your relationship with food has been difficult in the past — and for a good number of us it has — read this early, and know that support resources exists and Jonah holds a circle specifically for that ground.

Last thing. You are allowed to find this hard while it is also working. Both of those can be true in the same week, and in this community they very often are.