Testagen vs Tesamorelin
Side-by-side comparison of key properties, dosing, and research.
Anti-Aging & Longevity
TestagenGrowth Hormone PeptidesFat Loss & Metabolic
Tesamorelin- Summary
- Testagen is a tetrapeptide bioregulator (Lys-Glu-Asp-Gly) developed by Professor Vladimir Khavinson, tissue-specific for the testes. It supports Leydig cell function, normalization of testosterone biosynthesis, and spermatogenic activity. Testagen is used in men's health protocols for age-related testosterone decline, male fertility support, and testicular anti-aging.
- Tesamorelin is an FDA-approved synthetic GHRH analog specifically indicated for reduction of excess abdominal (visceral) fat in HIV patients with lipodystrophy. It is the only GHRH peptide with FDA approval for a fat-reduction indication and is studied off-label for metabolic syndrome and cognitive function.
- Half-Life
- Short (minutes); sustained gene-regulatory effects
- ~26 minutes
- Admin Route
- SubQ, Oral
- SubQ
- Research
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- —
- Typical Dose
- 10 mg per day
- 2 mg
- Frequency
- Daily for 10–30 days
- Once daily
- Key Benefits
- Supports endogenous testosterone synthesis via Leydig cell normalization
- Promotes spermatogenesis and sperm quality
- Anti-aging effects on testicular tissue
- May attenuate age-related testosterone decline
- Mechanistically distinct from TRT — does not suppress HPG axis
- Useful adjunct to Gonadorelin and Kisspeptin-10 in male hormonal protocols
- Supports male fertility without exogenous hormone replacement
- FDA-approved for visceral fat reduction in HIV lipodystrophy
- Significant reduction in trunk/visceral fat (average 15–20% in trials)
- Improved triglyceride and lipid profiles
- Potential cognitive benefits and memory improvement
- Preserves lean mass while reducing fat
- Natural pulsatile GH stimulation
- Side Effects
- Generally well tolerated
- Mild injection site reactions
- No significant endocrine disruption reported at standard doses
- Injection site reactions (redness, irritation)
- Arthralgia and joint pain
- Peripheral edema
- Carpal tunnel syndrome
- +2 more
- Stacks With
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