Clenbuterol typically stays detectable in urine for 7–10 days after a single dose. It can be detected in blood for a shorter window, and in hair, the detection window can be extended to months.
The table below summarizes the key detection times for clenbuterol in different biological samples, derived from various studies:
| Test Matrix | Typical Detection Time | Key Considerations |
|---|---|---|
| Urine | ~7–10 days | After a repeated, multi-day dosing regimen, the detection window may extend up to 14 days. |
| Dried Blood Spots (DBS) | ~3 days | Provides a shorter detection window compared to urine. |
| Hair | Months | A study in horses found it still detectable up to a year after the last dose. |
Given clenbuterol's status as a performance-enhancing drug (PED) prohibited in sports, these detection times are particularly relevant for athletes and individuals subject to doping controls.
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