Semax vs TB-500
Overview
Semax is primarily a cognitive enhancement peptide, while TB-500 is used for healing & recovery.
This page compares Semax and TB-500 across their primary use, typical dosing, reported benefits and side effects, and U.S. regulatory status. For the full monograph on either compound — mechanism of action, clinical research, and references — follow the article links.
Side-by-side comparison
| Semax | TB-500 | |
|---|---|---|
| Category | Cognitive Enhancement | Healing & Recovery |
| Regulatory status (US) | Compounding (Rx) — Apr 2026 | Compounding (Rx) — Apr 2026 |
| Typical dosage | 300-600 mcg | 2-5 mg |
| Frequency | daily | weekly |
| Reported benefits | Enhanced focus and memory, neuroprotection, improved learning, mood enhancement, stress resilience | Tissue repair, improved flexibility, reduced inflammation, enhanced recovery, hair growth stimulation |
| Reported side effects | Generally safe. Possible: overstimulation, sleep disturbances if taken late | Minimal side effects. Rare: headache, nausea, injection site reactions |
Key differences
Primary use. Semax is categorised under Cognitive Enhancement, while TB-500 falls under Healing & Recovery. Their differing categories mean they are usually chosen for different goals rather than as direct substitutes.
Regulatory status. Semax: not FDA-approved; compounding permitted with a prescription as of April 2026. TB-500: not FDA-approved; compounding permitted with a prescription as of April 2026.
Dosing. Semax is typically dosed at 300-600 mcg (daily). TB-500 is typically dosed at 2-5 mg (weekly).
Can you stack them?
Some protocols combine peptides, but stacking Semax and TB-500 has not been validated for safety or efficacy in controlled trials. Combining compounds can change their effects and risks. Nothing here is medical advice — consult a qualified healthcare provider before starting or combining any protocol.
Frequently asked questions
- What is the difference between Semax and TB-500?
- Semax is primarily a cognitive enhancement peptide, while TB-500 is used for healing & recovery. Semax is not FDA-approved; compounding permitted with a prescription (as of April 2026), whereas TB-500 is not FDA-approved; compounding permitted with a prescription (as of April 2026).
- What is Semax used for?
- Cognitive enhancement, focus, memory.
- What is TB-500 used for?
- Tissue repair, flexibility, inflammation.
- Can you take Semax and TB-500 together?
- Some users combine peptides within a single protocol, but stacking Semax and TB-500 has not been established as safe or effective in controlled trials. Neither this comparison nor PeptideSciences101 is medical advice — consult a qualified healthcare provider before combining any compounds.
- Is Semax or TB-500 FDA-approved?
- Semax is not FDA-approved; compounding permitted with a prescription (as of April 2026). TB-500 is not FDA-approved; compounding permitted with a prescription (as of April 2026).