Thymulin vs SLU-PP-332
Side-by-side comparison of key properties, dosing, and research.
Immune Support
ThymulinRecovery & RepairFat Loss & Metabolic
SLU-PP-332- Summary
- Thymulin is a nonapeptide hormone produced exclusively by the thymic epithelium. It requires zinc for biological activity and plays a critical role in T-lymphocyte maturation, differentiation, and immune regulation. Thymulin levels decline dramatically with age, contributing to immunosenescence.
- SLU-PP-332 is a small molecule exercise mimetic that activates estrogen-related receptors ERRalpha and ERRdelta (ERRa/d), transcription factors that drive oxidative metabolism programs. In animal studies it significantly enhanced endurance capacity and metabolic fitness without exercise, mimicking many of the cardiovascular and metabolic adaptations of aerobic training.
- Half-Life
- ~30 minutes active half-life
- Not established in humans; rodent pharmacokinetics suggest hours
- Admin Route
- SubQ
- Oral (research), Subcutaneous (research)
- Research
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- Typical Dose
- 20-30 mcg
- Not established for humans; rodent studies used ~100 mg/kg/day
- Frequency
- 10 days per month (Khavinson protocol)
- Once daily in rodent studies
- Key Benefits
- Enhances T-cell maturation and differentiation
- Boosts NK cell cytotoxic activity
- Reduces inflammatory cytokine production (TNF-α, IL-1)
- Anti-nociceptive (pain-reducing) properties
- Restores age-related immune decline
- Anti-inflammatory via serotonin pathway modulation
- Significant enhancement of aerobic endurance capacity
- Increases mitochondrial density and oxidative metabolism in muscle
- Promotes beneficial shift toward oxidative muscle fiber phenotype
- Improves cardiac efficiency and cardiovascular fitness markers
- Potential for obesity, metabolic syndrome, and heart failure treatment
- Exercise mimetic for populations unable to exercise (disability, frailty, disease)
- Side Effects
- Injection site reactions
- Mild fatigue initially as immune system activates
- Limited human data; all studies are preclinical (rodent)
- Unknown cardiovascular effects with long-term or high-dose use in humans
- Potential hormonal interactions via ERR pathway (ERRs modulate estrogen-related signaling)
- Off-target effects not fully characterized
- Stacks With
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