TB-500 Side Effects
Medically reviewed by Dr. Jonathan Snipes, MD
Reviewed for clinical accuracy · Last reviewed July 22, 2026 · Review policy
Quick answer
TB-500 has not been through formal human safety trials, so its side-effect profile is not well characterized. Reported effects are generally mild (injection-site reactions, fatigue or lethargy and head-rush or lightheadedness), but the absence of controlled human data is itself the main safety consideration.
| Effect | Frequency |
|---|---|
| Injection-site reactions | Reported |
| Fatigue or lethargy | Reported |
| Head-rush or lightheadedness | Reported |
| Temporary flu-like feelings | Reported |
TB-500's human side-effect profile is not well characterized, because the specific fragment has not gone through formal human safety trials. Reported effects are mild and anecdotal (injection-site irritation, temporary lethargy or head-rush). As with any research-chemical peptide, the dominant safety concern is not a known severe effect but the unknowns: unverified content, sterility and long-term risk.
Frequently asked questions
What are the most common TB-500 side effects?+
TB-500 has not completed formal human safety trials, so its side effects are not well characterized. Reported effects are generally mild; the lack of controlled data is itself the main safety consideration.
Is TB-500 safe?+
TB-500's human safety is not well characterized because it has not completed formal human safety trials. Any use should be through a licensed clinician and a legitimate pharmacy, not research-chemical suppliers.