Natural Weight Loss Injections: What They Are and How to Track Them

GLP-1 (glucagon-like peptide-1) is a hormone your body releases naturally after eating. It plays a role in signalling fullness, regulating appetite, and slowing the rate at which food leaves the stomach. Semaglutide, the active substance in Wegovy, is a GLP-1 receptor agonist — meaning it mimics this naturally occurring hormone to produce similar effects. Tirzepatide, the active substance in Mounjaro, goes a step further by also acting on GIP (glucose-dependent insulinotropic polypeptide), another hormone involved in appetite and energy regulation.

Because these medicines work through pathways the body already uses, many people describe the effect as a reduction in "food noise" — the constant background preoccupation with eating — rather than a forceful suppression of appetite. That said, everyone's experience varies, and the medicines are prescription-only precisely because suitability and dose decisions need to be made with a healthcare professional.

Both Mounjaro and Wegovy are administered as once-weekly subcutaneous (under the skin) injections. Common injection sites include the abdomen, the front of the thigh, and the upper arm. Rotating between sites matters: injecting repeatedly into the same spot can cause skin changes over time, so most prescribers recommend moving around within and between sites. For a broader overview of these medicines, see our guide to weight loss injections.

What the injection schedule looks like

Both medicines are typically started at a lower dose and adjusted over time, with the pace and progression guided entirely by your prescriber. The once-weekly schedule means the same day each week becomes your injection day — a routine that is easy to stick to once it is logged and reminded consistently. If you have questions about cost or what to expect from your prescription over time, our pages on weight loss injection pricing factors and finding value from your prescription cover those topics in more detail.

Staying on top of a weekly injection schedule — including which site you used last — is one of the most practical challenges of GLP-1 life, and it is exactly where GLP Trackr is built to help.

Injection-site rotation, simplified

Each time you inject, you can log the site (abdomen, thigh, or upper arm) directly in the app. GLP Trackr tracks your rotation history and suggests your next site automatically, so you are never guessing or trying to remember where you injected three weeks ago. Over time, this builds a clear picture you can glance at before every dose.

Dose logging and reminders

Alongside site tracking, the app lets you record the dose strength and the date and time of each injection. Gentle weekly reminders mean your injection day stays front of mind without you having to rely on memory alone — a small thing that makes a meaningful difference to consistency over months of treatment.

Bringing your data to your prescriber

If you ever want to discuss how your injection routine is going — whether that is a site reaction you have noticed, a pattern in how you feel after each dose, or simply a record to review together — the app's doctor report feature lets you bring a clear summary of your journey to your next appointment. Your prescriber is always the right person to guide any decisions about your injection routine, dose, or schedule. If you experience anything severe, persistent, or worrying at an injection site or after a dose, contact your healthcare professional promptly rather than waiting.

Any side effects worth noting can also be reported to your national pharmacovigilance scheme (such as the UK's Yellow Card scheme or the equivalent in your country), in addition to raising them with your prescriber.

Ready to bring some order to your weekly injection routine? GLP Trackr's injection tracker, rotation suggestions, and dose reminders are free to explore — download on the App Store or Google Play and start a 7-day free trial today.