Tesamorelin
A peptide that tells your body to produce more of its own growth hormone — with a particular focus on how your body stores and burns fat. Tesamorelin is especially effective at reducing visceral fat (the deep belly fat that sits around your organs), improving metabolic health, and supporting leaner body composition.
Two injections per week into the abdomen, for 4–8 weeks. Simple protocol, meaningful results.
How Tesamorelin Works
Your brain has a gland — the pituitary gland — whose job includes signaling your body to release growth hormone. Growth hormone in turn tells your body how to use energy: burn fat, build muscle, repair tissue, and maintain healthy metabolism. As we age, this signaling naturally weakens and growth hormone levels decline.
Tesamorelin is a synthetic version of the signal your brain already uses to trigger this process — called growth hormone-releasing hormone (GHRH). When you inject it, it amplifies the signal your pituitary gland receives, prompting it to release more of your own natural growth hormone. Your body stays in control of how much it produces — this is not the same as injecting growth hormone directly.
Tesamorelin has a particular affinity for visceral fat — the deep abdominal fat that accumulates around organs and is tightly linked to metabolic disease, insulin resistance, and cardiovascular risk. It's one of the only compounds studied specifically for this type of fat reduction, which is why it was the first GHRH analog to receive FDA approval (for a specific medical indication), and why it remains one of the most clinically credible options in metabolic peptide therapy.
Why inject into the abdomen specifically? Tesamorelin targets visceral fat — the deep fat stored in and around the abdominal cavity. Injecting into the abdomen bilaterally (alternating left and right sides) puts the peptide close to its primary target tissue, optimizes local concentration, and is consistent with how Tesamorelin has been studied clinically. Consistent timing and site rotation maximize both effectiveness and absorption.
What Tesamorelin Does For Your Body
Benefits build progressively over a 4–8 week cycle. Most people notice changes in energy and body composition within the first 2–4 weeks, with more significant fat reduction and metabolic improvements building through the full cycle.
Tesamorelin's most well-documented effect is the reduction of visceral fat — the deep abdominal fat that surrounds your organs. This is distinct from the subcutaneous fat just under your skin. Visceral fat is strongly linked to metabolic disease, insulin resistance, and cardiovascular risk. Most users see measurable changes in abdominal circumference and belly fat within 4–8 weeks of consistent twice-weekly dosing.
Tesamorelin amplifies the signal your brain already sends to trigger growth hormone release. The result is a meaningful increase in your body's own natural GH output — the same growth hormone responsible for fat burning, muscle maintenance, tissue repair, sleep quality, and overall metabolic efficiency. Because your body still controls the process, it's self-regulating and well tolerated.
Tesamorelin improves the way your body processes fat and sugar — supporting a healthier lipid profile (better triglycerides and cholesterol balance) and improved glucose metabolism. As visceral fat decreases, insulin sensitivity typically improves alongside it, creating a positive cascade effect on overall metabolic health that extends well beyond just body composition.
Growth hormone plays a direct role in maintaining and building lean muscle mass. By increasing GH output, Tesamorelin supports the preservation and gradual development of lean muscle — particularly relevant as natural GH decline accelerates with age and muscle loss becomes harder to prevent. Most users notice improved body composition (less fat, more definition) even without major changes to exercise habits.
Improved GH signaling enhances the efficiency of tissue repair, increases stamina, and supports steadier energy throughout the day. Many users report reduced fatigue, faster recovery from physical activity, and a general sense of vitality that builds over the course of the cycle. These effects are closely linked to the metabolic improvements — better energy utilization at the cellular level translates directly to how you feel.
Growth hormone supports collagen production, skin hydration, and the cellular repair processes that keep skin looking and functioning younger. Users on Tesamorelin cycles often report improved skin texture and hydration as a secondary benefit. Combined with the metabolic improvements, the overall effect is a more resilient, youthful physical baseline — both internally and visibly.
How to Use Tesamorelin
Tesamorelin uses a single fixed dose — no titration, no guesswork. Two injections per week into the abdomen. Your vial comes as a ready-to-use liquid. No mixing or preparation required.
| What | Amount | Details |
|---|---|---|
| Dose per injection | 0.1 mL (dial to 10) | One fixed dose each time — draw 0.1 mL or set pen dial to 10 |
| Frequency | Twice per week | Space evenly — e.g. Monday and Thursday, or Tuesday and Friday |
| Duration | 4–8 weeks | Continue for as long as directed by your provider |
| Method | Subcutaneous | Just under the skin — not into muscle |
| Injection site | Abdomen only | Alternate left and right sides of the abdomen with each dose |
Important — abdomen only, left/right rotation: Tesamorelin should always be injected into the abdomen subcutaneously. Alternate between the left side and right side with each dose. Consistent timing (same days each week) and consistent site rotation maximize effectiveness and absorption. Do not inject into the same spot twice in a row.
Step-by-step injection guide
Dose Calculator
Your prescribed dose is fixed at 0.1 mL (10 units on a U-100 syringe). The calculator is pre-set to that. Enter your vial details to see how many doses it contains and how many weeks it covers at twice-weekly dosing.
Defaults to your Bespoke Biology vial: 30 mg / 3 mL (10 mg/mL).
= 10.0 mg/mL · each unit on a U-100 syringe = 0.1 mg
Always confirm the exact mg and mL printed on your vial label. Your 30 mg / 3 mL vial provides 30 doses — enough for 15 weeks at twice-weekly dosing.
Quick Reference
Based on your Bespoke Biology vial: 30 mg / 3 mL (10 mg/mL). On a U-100 syringe: 1 unit = 0.01 mL = 0.1 mg.
| Units to draw | Volume (mL) | mg per dose | Doses per vial | Weeks covered (2×/wk) |
|---|---|---|---|---|
| 10 units (standard dose) | 0.10 mL | 1.0 mg | 30 doses | 15 weeks |
| 5 units | 0.05 mL | 0.5 mg | 60 doses | 30 weeks |
| 20 units | 0.20 mL | 2.0 mg | 15 doses | 7.5 weeks |
Highlighted row = your standard prescribed dose. At 10 units twice per week, one 30 mg / 3 mL vial covers 15 weeks — well beyond a full 8-week cycle. Always follow your provider's guidance on duration and dosing.
Common Questions
Side Effects to Watch For
Tesamorelin is generally well tolerated. Reported side effects are mild and transient:
- /Redness or irritation at the injection site — alternating left and right sides prevents buildup
- /Mild headache when first starting — typically resolves within the first few days
- /Swelling or tingling in hands and feet (rare) — a known GH-related effect, usually short-lived
- /Mild nausea (rare) — typically resolves quickly without intervention
These effects are short-lived and resolve without intervention. Contact your provider if anything feels significant or persists beyond a few days.
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USA-formulated, lab-verified liquid formula. Ready to use — no mixing required. Includes full dosing guidance from our clinical team.
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