This weight loss injections guide gathers everything the ContaCal blog has published about Mounjaro, Ozempic, Wegovy and the medications that move your weight. The point is simple: you find out which article to read right now, without opening ten tabs.
If your question is broader, like what these shots are, the types, the cost and the side effects, start with the complete guide to weight loss injection side effects. This page is something else: an annotated index, organized by where you are in treatment.
Note: this is educational nutrition content. Your doctor decides whether you use a medication, which one and at what dose. Nothing in this guide replaces a medical visit, and none of it gives dosing advice.
How to use this weight loss injections guide
The articles are split into six blocks, in the order questions usually come up: understanding the drug, getting started, eating during treatment, tracking results, stopping and, at the end, medications that push weight up.
Each item has a sentence or two on when it is worth reading. If only one block matters to you today, jump straight to it.
Before you start: what each injection is
What is Mounjaro? explains tirzepatide, the weekly injection that targets two hormones tied to hunger and blood sugar. Read it if your doctor mentioned the name and you want the basics before the appointment.
How does Ozempic work for weight loss? shows how the drug copies the GLP-1 hormone, lowers hunger and creates the calorie deficit that takes fat off. Useful if you want to know why your appetite fades and what the shot cannot do on its own.
GLP-1 for weight loss walks through the four approved medical uses of GLP-1 drugs: type 2 diabetes, heart protection, sleep apnea and appetite control. Read it if you think these drugs are only about the scale.
Semaglutide vs tirzepatide compares the two head to head: results, dosing, brands, side effects and the cost of Ozempic, Wegovy, Mounjaro and Zepbound. Read it to have a better conversation with your doctor, not to pick one yourself.
Best weight loss medication covers the FDA-approved options, what the science says and the myths. Good if your feed is full of miracle promises.
How to get Mounjaro explains who can prescribe it, the telehealth route and the real cost. Read it if someone offered you the drug without a proper medical evaluation.
ContaCal
Track your protein while the weight comes off
When appetite drops, it is easy to eat too little and lose muscle along with fat. Snap your meal and see calories and protein instantly.
Or see the ContaCal calorie tracking app.
The first weeks on the injection
How to use an Ozempic pen covers where to inject, how often, how to store it and what to expect in the first days. Dosing stays with your doctor. The article handles everything around it.
Mounjaro side effects focuses on the three effects that make people quit: nausea, extreme fullness and food aversion. It shows how long each one usually lasts and which rare signs need medical care right away.
Mounjaro and no appetite is for the days when you barely eat. Losing appetite means the drug is working, and the article shows when eating too little turns into a protein gap that costs you muscle.
How fast does Mounjaro work? explains the two clocks of treatment: appetite usually fades in the first two weeks, while the scale takes about a month. Read it if you are anxious because the number has not moved.
What to eat on a weight loss injection
With less hunger, the risk flips. It becomes eating too little and losing muscle along with fat. The articles in this block deal with exactly that.
What to eat on Mounjaro builds the plate that protects muscle, with a protein target and meal examples. If you read only one food article, make it this one.
Foods to avoid on Mounjaro shows that nothing is off limits, but there are two lists: foods that make nausea worse and foods that crowd out protein. Useful if you are cutting foods at random.
Can you drink alcohol on Mounjaro? explains what changes with alcohol, why you can feel less drunk than you are and what a night out costs your protein target.
Mounjaro muscle loss looks at how much lean mass was lost in the trials, even with a prescribed diet and exercise, and how to protect it. Read it if someone told you the shot does all the work.
The protein calculator gives you a starting number for your daily protein, which is worth confirming with your dietitian.
Results, the scale and plateaus
How much weight can you lose on Ozempic? does the math with the study averages and shows how much of the loss is fat and how much is muscle.
Ozempic before and after lays out the 3, 6 and 12 month timeline and why the scale barely moves early on. Good for setting expectations before comparing your photo with someone else's.
Semaglutide plateau explains why weight stalls on Ozempic or Wegovy, when that is normal and a four week plan with six fixes. Read it when the scale stops for several weeks in a row.
When the injection stops
What happens when you stop taking Mounjaro shows the trial numbers after stopping and why what comes back is not what left: some of the lost muscle can return as fat. Read it before you stop, ideally while still on treatment.
The weight loss injection guide also covers how to use these drugs safely over time, which works as a final review.
Medications that cause weight gain
Not every drug that affects weight makes it drop. Two articles cover the opposite direction, always without changing your dose on your own.
Quetiapine and weight gain (in Portuguese) shows where the gain comes from, often the hunger after the nighttime pill, the numbers to track and how to bring them to your psychiatrist.
Prednisone weight gain teaches you to tell fluid from fat and how the form and length of the course change the picture.
Sources
Organized and reviewed by Lucas, nutritionist. The articles in this guide draw, among other references, on the two trials that put these drugs at the center of obesity care, both in the New England Journal of Medicine: STEP 1, on weekly semaglutide and SURMOUNT-1, on tirzepatide. MedlinePlus, from the US National Library of Medicine, summarizes the use and side effects of semaglutide and tirzepatide.