TB-500 vs Tesamorelin

A detailed comparison to help you understand the differences and choose the right peptide for your research goals.

TB-500

Thymosin Beta-4 (TB-500) is a naturally occurring peptide present in almost all human and animal cells. It plays a crucial role in tissue repair and regeneration.

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Tesamorelin

Tesamorelin is a synthetic analog of growth hormone-releasing hormone (GHRH). It is FDA-approved under the brand name Egrifta for reducing excess abdominal fat in HIV-infected patients with lipodystrophy.

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Side-by-Side Comparison

Aspect	TB-500	Tesamorelin
Dose Range	2 mg–2.5 mg	2 mg
Frequency	Less than daily	1x daily
Cycle Length	4–8 weeks	8–52 weeks
Route	subcutaneous	subcutaneous
Mechanism	TB-500 promotes cell migration and differentiation, regulates actin (a cell-building protein), and reduces inflammation. It supports the formation of new blood vessels and wound healing.	Stimulates the pituitary gland to produce and release growth hormone by binding to GHRH receptors. Increases IGF-1 levels which promotes lipolysis and reduces visceral adipose tissue.
Typical Dosage	Research protocols typically use 2-2.5mg twice weekly during the loading phase, followed by maintenance dosing of 2mg every 2 weeks.	FDA-approved dose: 2mg administered subcutaneously once daily. Research protocols may use various dosing schedules.
Administration	Administered via subcutaneous or intramuscular injection. Some protocols suggest injection near injury sites.	Subcutaneous injection into the abdomen. Rotate injection sites. Best administered at the same time daily, preferably in the evening.
Side Effects	May cause temporary fatigue, headache, or localized irritation at injection sites.	Common side effects include injection site reactions (erythema, pruritus), joint pain, peripheral edema, and muscle pain. May cause elevated blood glucose.
Best For	Muscle Growth Recovery & Healing	Muscle Growth Fat Loss