Sermorelin vs TB-500

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

Sermorelin

Sermorelin is a synthetic analog of GHRH consisting of the first 29 amino acids of the natural hormone. It was previously FDA-approved for GH deficiency diagnosis and treatment in children.

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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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Side-by-Side Comparison

Aspect	Sermorelin	TB-500
Dose Range	100 mcg–300 mcg	2 mg–2.5 mg
Frequency	1x daily	Less than daily
Cycle Length	8–12 weeks	4–8 weeks
Route	subcutaneous	subcutaneous
Mechanism	Binds to GHRH receptors in the pituitary gland to stimulate natural GH production and release. Maintains the body's natural feedback mechanisms for GH regulation.	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.
Typical Dosage	Typical dosing: 200-500mcg administered once daily, usually before bed. Some protocols use twice daily dosing.	Research protocols typically use 2-2.5mg twice weekly during the loading phase, followed by maintenance dosing of 2mg every 2 weeks.
Administration	Subcutaneous injection, preferably at bedtime to work with natural GH release patterns. Can be combined with GHRPs for synergistic effects.	Administered via subcutaneous or intramuscular injection. Some protocols suggest injection near injury sites.
Side Effects	Generally well-tolerated. May cause injection site reactions, headache, flushing, or dizziness. Less side effects than direct GH administration.	May cause temporary fatigue, headache, or localized irritation at injection sites.
Best For	Muscle Growth Fat Loss Recovery & Healing Sleep Quality	Muscle Growth Recovery & Healing