Frequently Asked Questions

What is Slim Shots?

Slim Shots is a UK-based information resource covering weight loss injections and tanning injections. We provide science-backed, independently reviewed information on Semaglutide, Tirzepatide, Retatrutide and Melanotan 2 — covering how they work, what the clinical data shows, and what results people typically experience. Our content covers the same active ingredients found in market-leading brands like Ozempic®, Wegovy® and Mounjaro®.

Do I need a prescription to use these compounds?

Prescription requirements vary depending on the compound and how it is sourced. We always recommend consulting a qualified healthcare professional before starting any injectable weight loss programme. Our information is provided for educational purposes only.

Are these compounds lab-tested?

When sourced from reputable suppliers, Semaglutide, Tirzepatide, Retatrutide and Melanotan 2 should come with independent laboratory testing and Certificates of Analysis (CoA) confirming purity and composition. Always verify this documentation before use.

How are these compounds different from Ozempic®, Wegovy® and Mounjaro®?

Ozempic®, Wegovy® and Mounjaro® are branded, prescription-only medicines. The compounds we cover — Semaglutide (Ozempic®/Wegovy®) and Tirzepatide (Mounjaro®) — contain the same active ingredients as these branded products.

We also cover Retatrutide — a next-generation triple agonist not yet available as a branded medicine — and Melanotan 2 tanning injections.

What is Semaglutide?

Semaglutide is a GLP-1 receptor agonist — the active ingredient in Ozempic® and Wegovy®. It mimics the natural GLP-1 hormone to suppress appetite, slow gastric emptying and regulate insulin secretion. The result is reduced caloric intake and significant, sustained fat loss. It is administered as a once-weekly subcutaneous injection.

How much weight can I lose with Semaglutide?

Large-scale clinical trials of Semaglutide-based medicines have reported average body weight reductions of up to 15% over 68 weeks. Individual results vary depending on starting weight, diet, activity levels and adherence to the dosing protocol. Semaglutide is one of the most clinically studied weight loss injections available.

How is Semaglutide dosed?

Semaglutide is typically started at a low dose (0.25mg per week) and gradually increased over several weeks to minimise side effects and allow the body to adjust. Common dose escalation schedules progress through 0.5mg, 1mg and up to 2.4mg per week for weight management.

It is administered as a once-weekly subcutaneous injection into the abdomen, thigh or upper arm. We recommend consulting a healthcare professional for personalised dosing guidance.

What are the side effects of Semaglutide?

The most commonly reported side effects of Semaglutide are gastrointestinal — including nausea, diarrhoea, constipation and reduced appetite. These are typically mild and most pronounced during the dose escalation phase. Starting at a low dose and increasing gradually helps minimise these effects. Always consult a healthcare professional if you have concerns.

Is Semaglutide the same as Ozempic® or Wegovy®?

Yes — Semaglutide is the active ingredient in both Ozempic® (approved for type 2 diabetes) and Wegovy® (approved for weight management). These branded products contain the same active molecule as the Semaglutide compounds covered on this site.

What is Tirzepatide?

Tirzepatide is a dual GLP-1/GIP receptor agonist — the active ingredient in Mounjaro®. By targeting two hormone pathways simultaneously, it produces superior appetite suppression and fat loss compared to single-agonist options like Semaglutide. It is widely regarded as the most effective mainstream weight loss injection currently available.

How much weight can I lose with Tirzepatide?

Clinical trials of Tirzepatide-based medicines have reported average weight reductions of up to 22.5% of body weight — significantly higher than those seen with Semaglutide. This makes Tirzepatide the go-to choice for those seeking maximum results from a weight loss injection.

How is Tirzepatide different from Semaglutide?

Semaglutide targets only GLP-1 receptors. Tirzepatide targets both GLP-1 and GIP receptors — a dual-action mechanism that produces greater appetite suppression and more significant fat loss. Clinical head-to-head data consistently shows Tirzepatide outperforming Semaglutide for weight loss outcomes.

What are the side effects of Tirzepatide?

Side effects of Tirzepatide are broadly similar to Semaglutide — primarily gastrointestinal symptoms such as nausea, diarrhoea and reduced appetite, most common during dose escalation. These typically subside as the body adjusts. Consult a healthcare professional for personalised guidance.

Which is better — Semaglutide or Tirzepatide?

For maximum weight loss, Tirzepatide generally outperforms Semaglutide due to its dual-agonist mechanism. However, Semaglutide remains highly effective and is a well-established starting point. If you're unsure which is right for you, our team is available via WhatsApp to help guide you.

What results does Retatrutide produce?

Phase 2 clinical data for Retatrutide has shown average weight reductions exceeding 24% of body weight — surpassing both Semaglutide and Tirzepatide. It represents the cutting edge of injectable weight loss science.

Is Retatrutide available as a branded medicine?

Not yet. Retatrutide is still in clinical development and has not yet been approved as a branded medicine. It represents next-generation weight loss technology ahead of mainstream availability.

How does Retatrutide compare to Semaglutide and Tirzepatide?

Retatrutide targets three receptor pathways (GLP-1, GIP and glucagon) versus two for Tirzepatide and one for Semaglutide. Early data suggests this triple-action mechanism produces the greatest weight loss results of the three — making it the most powerful option for those seeking maximum fat loss from a weight loss injection.

What is Melanotan 2 (MT2)?

Melanotan 2 (MT2) is the UK's most popular tanning injection. It works by stimulating melanocortin receptors in the body, triggering increased production of melanin — the pigment responsible for skin colour. The result is a deep, natural-looking tan that develops with minimal sun exposure.

How does Melanotan 2 work?

MT2 binds to melanocortin receptors (particularly MC1R) and stimulates the production of eumelanin — the dark pigment that gives skin its tan colour. Unlike sunbeds or prolonged UV exposure, Melanotan 2 triggers melanin production directly, meaning you can achieve a tan with far less sun exposure.

How quickly does Melanotan 2 work?

Most users report visible tanning results within 5–10 days of starting MT2, with some noticing changes within just a few days. Results are enhanced with brief, moderate sun exposure. A loading phase followed by a maintenance dose is the typical protocol.

What are the side effects of Melanotan 2?

Commonly reported side effects of MT2 include temporary nausea (particularly after the first few injections), facial flushing and increased libido. These effects are typically mild and short-lived. Starting with a lower dose helps minimise initial side effects. Always consult a healthcare professional if you have concerns.

How should I store weight loss injections?

Semaglutide, Tirzepatide, Retatrutide and Melanotan 2 should be stored refrigerated at 2–8°C and protected from direct light. Avoid freezing unless explicitly stated on the product label. Once reconstituted, use within the timeframe specified in the product documentation. Always refer to the specific storage guidance provided with each product.

What supplies do I need to use weight loss injections?

You will typically need bacteriostatic water for reconstitution, insulin syringes (typically 1ml/U100), alcohol swabs and a sharps disposal container. Some products may come pre-mixed. Full guidance is provided with each product, and our team is available via WhatsApp to assist.

Can I travel with weight loss injections?

If travelling, use an insulated cool bag or validated travel cooler to keep your injections at the correct temperature. Check the regulations of your destination country regarding injectable products before travelling. Our team can advise on travel storage via WhatsApp.