SS-31 (Elamipretide) vs Thymosin Alpha-1

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

SS-31 (Elamipretide)

SS-31, also known as Elamipretide or Bendavia, is a mitochondria-targeted tetrapeptide. It has been studied extensively for mitochondrial diseases, heart failure, and age-related decline in mitochondrial function.

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Thymosin Alpha-1

Thymosin Alpha-1 is a peptide naturally produced by the thymus gland that plays a crucial role in immune system modulation. It is approved in over 35 countries for various conditions including hepatitis B and C.

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Side-by-Side Comparison

Aspect	SS-31 (Elamipretide)	Thymosin Alpha-1
Dose Range	20 mg–40 mg	1.6 mg–3.2 mg
Frequency	1x daily	Less than daily
Cycle Length	4–12 weeks	4–12 weeks
Route	subcutaneous	subcutaneous
Mechanism	Concentrates in the inner mitochondrial membrane where it binds to cardiolipin, stabilizing electron transport chain function, reducing reactive oxygen species, and improving ATP production efficiency.	Enhances T-cell function and maturation, stimulates dendritic cell activity, and modulates cytokine production. Promotes the differentiation of stem cells into mature T lymphocytes.
Typical Dosage	Clinical trials have used IV infusions of 0.25mg/kg for acute conditions. Subcutaneous dosing protocols for research use typically range from 1-5mg daily.	Clinical dosing typically ranges from 1.6mg to 6.4mg administered subcutaneously 2-3 times weekly. Research protocols may vary.
Administration	Can be administered IV or subcutaneously. Most clinical research has used IV administration for cardiac conditions.	Subcutaneous injection. Often used in cycles or as part of comprehensive immune support protocols.
Side Effects	Generally well-tolerated. Clinical trials reported injection site reactions and occasional headache.	Generally well-tolerated. Rare side effects include injection site reactions, mild flu-like symptoms, and temporary fatigue.
Best For	Recovery & Healing Anti-Aging & Longevity	Recovery & Healing