Independent GLP-1 journalism
Evergreen
Evergreen, practical, reviewed twice a year. The pages we send people to when they ask us where to start.
55 pieces
Most people on these drugs are monitored on a bathroom scale and nothing else. A short, cheap panel twice a year would catch nearly everything that quietly goes wrong.
Read the pieceNobody is going to tell you to give up coffee, and nobody should. But it interacts with three things this drug class has already made more fragile, and the interactions are all avoidable.
Nausea gets the attention because it arrives first and loudly. Constipation arrives in week three, never fully resolves for some people, and is the thing they eventually stop over.
Acute kidney injury on this drug class is almost never a direct drug effect. It is three days of vomiting in someone who did not think to replace the fluid, and it is entirely avoidable.
Repeated vomiting erodes enamel permanently, reflux does it more quietly, and any dental procedure involving sedation now needs the same conversation as surgery. None of this is on the leaflet.
A drug famous for slowing the gut down produces loose stools in a substantial minority, which sounds contradictory until you know what else is usually in the picture.
No blood service in the United States defers you for taking one of these. What will defer you is the iron, the weight and the hydration — three things this drug class makes considerably more likely.
The advice to exercise while losing weight is correct and almost always delivered by someone who has not tried doing it on nine hundred calories and a stomach that empties at half speed.
In 2023 the advice was to hold your weekly injection for a week. In 2024 a multi-society panel replaced that with something considerably more nuanced. Plenty of pre-op letters have not caught up.
Four drugs, four different ladders, and a great deal of confusion about which rung anyone is standing on. Here is every approved escalation schedule in one place, with the reasoning behind the steps.
Almost every device problem people describe turns out to be one of six things, and the one that matters most is knowing when you have actually missed a dose.
Almost every side effect in this class follows the same shape: bad after a dose increase, better within a fortnight, mostly gone by the time you have been at a dose for two months. Almost.
Most of what determines how your first year goes is decided in the fortnight before the first injection, by questions nobody thinks to ask until much later.
Skin keeps tightening for a year or more after the weight stops coming off, which means most people who panic at month eight are looking at an unfinished result.
There are more approved weight-loss drugs than most people realise, and they are not close to each other in effect. Knowing the order matters, because plenty of plans will only cover the bottom of it.
Most side-effect lists are alphabetical, which tells you nothing about what will happen to you. This one is ordered by frequency, with the trial numbers attached and the rare ones kept in proportion.
A stomach that empties slowly is a stomach that stays full longer, and a full stomach lying flat has only one direction to go. Most of the fix is mechanical rather than pharmacological.
Heat lowers blood pressure and removes fluid from a body that is already short of both. Nothing about it is dangerous in isolation, which is precisely why people underestimate the stack.
The rotten-egg burp is one of the most reliably reported side effects on tirzepatide and one of the least discussed in clinic, largely because nobody wants to be the person raising it.
The most common error when moving from semaglutide to tirzepatide is assuming your current dose buys you a head start. It does not, and the week you find that out is memorable.
The pens are more robust than people fear and less robust than a hot car boot. Most travel problems come down to three numbers and one decision about which bag it goes in.
Every weight loss curve flattens. The trial curves flatten, the surgical curves flatten, and yours will too. The question is whether you have hit a plateau or simply had a fortnight.
Appetite suppression solves the quantity problem and creates a composition one. Every bite now has to do more work, and most people spend month one finding this out the hard way.
Abdomen, thigh or upper arm, and it genuinely does not matter which. What matters is the handful of things people do wrong in the ten seconds before the needle goes in.
Clinical eligibility is a short, public, unambiguous rule. Whether anyone will pay for it is a completely separate question, and conflating the two is why so many people believe they were turned down for being too healthy.
The drug slows your stomach on purpose. Constipation is not a malfunction, it is the mechanism doing its job further down the tract than anyone wanted — which is why the fix is mechanical rather than clever.
Creatine monohydrate is a commodity costing pennies a gram, and it is the single best-evidenced supplement for holding on to strength while you lose a fifth of your body weight. The interesting question is what else is in the scoop.
Thirst tracks eating. Halve the food and you quietly halve the fluid and the sodium that came with it, which is why so much of what gets blamed on the drug is ordinary dehydration wearing a costume.
Every brand in this category claims transparency. Only some of them print the numbers that would let you check, and the gap between those two groups is the most useful thing a buyer can know.
Most of the supplements sold to people on Ozempic are designed to raise GLP-1. You are already injecting a GLP-1 agonist. The useful question is what the drug leaves behind, and which stack is built to replace it.
Age-related muscle loss was already running before you started. A GLP-1 adds a second subtraction on top of the first, and the arithmetic of that is the whole reason this ranking looks different.
Most supplement advice for this drug is written for a generic body. Menstrual iron losses, bone density during rapid loss, and a documented contraceptive interaction make the picture genuinely different.
Berberine got called nature's Ozempic by people who had not looked closely at either. It is a real compound with real effects and a real interaction profile, and it is the one shelf in this market where I would want your prescriber involved before your wallet.
A quarter to a third of what you lose on these drugs is lean tissue. No powder changes that on its own — but two of them meaningfully help, and the rest are selling you the idea of help.
Slowed gastric emptying is the mechanism that makes these drugs work and the mechanism that stops your bowels. Whether a probiotic helps depends entirely on which of those two problems you actually have.
The hollowing people notice at month six is lost facial fat, not tired skin. Nothing in a bottle puts that back — which makes the honest question what a serum or a supplement can still usefully do.
Week one is not the time to build a stack. It is the time to find out how your body handles the drug, with the smallest number of variables you can manage.
Tiredness on these drugs has four common causes and only one of them is fixed by a supplement you can buy today. Working out which one you have is worth more than anything in this ranking.
Appetite returns faster than muscle does. The months after you stop are when the lean mass you did not defend becomes a number you can feel, and the supplement priorities invert accordingly.
Nausea is the mechanism, not a malfunction, which sets a hard ceiling on what any supplement can do. Within that ceiling there is one cheap option with real trial evidence and a great deal of expensive noise.
Semaglutide's signature is gastrointestinal. Nausea, reflux and constipation shape what you can physically swallow, which makes tolerability the first ranking criterion rather than an afterthought.
Tirzepatide takes off more weight than any injectable before it, and the supplement question changes with the magnitude. When a fifth of your body is leaving, what you protect matters more than what you optimise.
Resistance training is the highest-leverage thing you can do on these drugs and the hardest to sustain, because you are being asked to train in a deficit with an appetite that will not cooperate.
Creatine, psyllium and a multivitamin are commodities. Put a GLP-1 label on the tub and the price roughly triples, which is a marketing achievement rather than a pharmacological one.
An entire industry has assembled around the answer being yes. The defensible answer is that two products help most people, two help some, and the rest exist because you are a motivated buyer with a new prescription.
Almost every avoidable failure I see in the first year of treatment traces back to the same thing: nobody wrote anything down. Here is what is worth recording, why it matters more on these drugs than on anything else I prescribe, and the tool I have settled on.
Appetite usually changes in the first week. The scale takes considerably longer, and almost everything people believe about the timeline comes from watching someone else's month one.
The four-day rule, the reason it exists, and why the fix that feels most sensible — doubling up — is the one that puts people in the emergency department.
Nobody is short of opinions about these drugs. What people are short of is a clear account of the first two months — what the body does, when, and which parts of it are worth a phone call.
The number is not the hard part. Getting a hundred and twenty grams into a body that stops being interested after four bites is a logistics problem, and it deserves to be treated as one.
You do not need a program, a coach, or a gym membership you will cancel in March. You need six movements, twice a week, and enough load that the last two repetitions are genuinely difficult.
Most denials are not clinical judgments. They are documentation failures, and documentation failures are the kind you can fix — if you know what the reviewer on the other end is actually reading.
List price, negotiated price, coupon price, cash price, compounded price. Five numbers, none of which is the price, and only one of which you will ever be quoted.
There is a real difference between a licensed 503A pharmacy with a prescriber behind it and a website selling vials labelled 'not for human consumption'. Most people cannot tell them apart, and the marketing is designed that way.
Almost everyone is warned about nausea. Almost nobody is told what it should feel like, how long it should last, or which version of it means you should stop reading and call someone.
On The Jab
The
GLP‑1
Handbook
Dr. Nick Robertson
MD
The book · 14 chapters
Everything I tell my own patients before their first injection. 214 pages of what actually matters in the first year — dosing, side effects, food, muscle, cost, and the part nobody prepares you for: maintenance.
Priced at four dollars because it should be affordable to everyone taking these drugs — not because it's worth four dollars. No upsell, no course, no supplement line.