Injection Shots for Weight Loss: What They Are and How to Track Them

Several types of injection are associated with weight management, and it is worth understanding what each one is and is not. The prescription medicines most commonly used in medically supervised weight-loss programmes are GLP-1 receptor agonists — a class that includes semaglutide (Wegovy) and, more recently, the dual GIP and GLP-1 receptor agonist tirzepatide (Mounjaro). Both are given as a once-weekly subcutaneous injection using a pre-filled pen device, and both are available only with a valid prescription from a qualified prescriber.

You may also come across references to other injectables in weight-loss conversations:

• Liraglutide (Saxenda): An older GLP-1 receptor agonist, administered daily rather than weekly. Like Mounjaro and Wegovy, it is a prescription-only medicine and not a product GLP Trackr sells or supplies.
• B12 shots: Vitamin B12 injections are sometimes discussed alongside weight-loss regimens. They do not directly cause weight loss, but a deficiency in B12 can cause fatigue, so some people have them to support energy levels. Their role in weight management is nutritional support, not a primary treatment.
• Ginger shots: These are food-based drinks — concentrated ginger extracts — not medicines. They are not injection shots in any medical sense and are not a weight-loss treatment.
• Belly shots: This is a colloquial term for subcutaneous injections administered to the abdomen, one of the common sites for medicines like Mounjaro and Wegovy.

If you are already prescribed a GLP-1 medicine and want a broader overview of how these injectables work, the weight-loss injections guide covers the landscape in more detail. You can also read specifically about Mounjaro as an injection for weight loss or explore how weight-loss injections work in practice.

Common Injection Sites

For subcutaneous GLP-1 medicines, the three most commonly used sites are the abdomen (belly), the front of the thigh, and the upper outer arm. Rotating between sites with each injection is generally recommended to reduce the risk of skin irritation or lumps forming at a single site. Your prescriber or the patient information leaflet that came with your pen will give you guidance specific to your medicine. If you are unsure whether your BMI or health profile affects site suitability, that is a question for your prescriber or doctor.

Staying on top of a weekly injection schedule — remembering which site you used last, logging the date and dose strength, and building a clear picture of your journey — is exactly what GLP Trackr is built to help with.

The app's injection-site tracking and rotation feature lets you record where you injected after each shot. GLP Trackr keeps a history of your sites and can suggest your next rotation, so you never have to try to remember whether you used your left abdomen or right thigh last week. Alongside this, dose logging captures the date, time, and strength of each injection in one place — useful both for your own records and as a clear summary to share at your next prescriber appointment.

If you ever notice a reaction at an injection site — redness, a small lump, or discomfort — you can log that too using the side-effect tracker and note any patterns over time to discuss with your healthcare professional.

GLP Trackr does not sell, prescribe, or supply any medicine. It is a companion tool for people who are already on their prescribed treatment and want to stay organised and consistent throughout their journey.

Always follow your prescriber or doctor's guidance on injection technique, site selection, and any concerns about your injection sites — they are best placed to advise based on your full medical history. If you notice a severe or persistent reaction at an injection site, contact your healthcare professional promptly.

Ready to keep your injection schedule on track? GLP Trackr is free to try for 7 days — download it on the App Store or Google Play and start logging your shots today.