RAD-140 (testolone) has an elimination half-life of roughly 45 to 60 hours in humans, meaning it takes about 10 to 14 days after your last dose for the compound to fully clear your bloodstream. Detection through anti-doping urine tests can extend well beyond that window, depending on the metabolites being targeted.
Half-Life and Total Clearance Time
The first human clinical trial of RAD-140, conducted in breast cancer patients at doses of 50 to 150 mg daily, measured a half-life of 44.7 hours. A separate pharmacokinetic analysis at the 100 mg dose found a half-life of approximately 60 hours. The variation likely reflects differences between individuals, but both figures point to the same ballpark: the compound halves its concentration in your blood roughly every two to two and a half days.
A drug is considered essentially cleared after four to five half-lives. Using the 45- to 60-hour range, that works out to approximately 8 to 13 days after your final dose before blood levels drop to negligible amounts. This timeline applies regardless of how high your dose was. A larger dose raises the peak concentration but does not change the rate at which your body eliminates the compound.
How Your Body Breaks It Down
Your liver processes RAD-140 into at least ten identified metabolites through reactions like hydroxylation (adding oxygen), glucuronidation (tagging the molecule for excretion in urine), hydrolysis (breaking chemical bonds with water), and sulfation. These metabolites are excreted primarily through urine, and they clear at different rates. Some disappear within days, while others linger longer than the parent compound itself.
Drug Testing Detection Windows
If your concern is anti-doping testing, the detection window is significantly longer than the clearance time from blood. Anti-doping laboratories, including those operating under the World Anti-Doping Agency framework, look for the unchanged parent compound RAD-140 in urine because it offers the longest detection window of any analyte. One hydroxylated metabolite, designated M6b, is also detectable for an extended period and serves as an additional testing target.
Exact detection windows in urine are not published as precise cutoff days, partly because labs continue improving their sensitivity. However, the combination of a long half-life and highly sensitive mass spectrometry testing means traces can be identified in urine for several weeks after the last dose. Athletes have tested positive for SARMs months after claimed cessation, though individual results depend on dose, duration of use, metabolism, and the sensitivity of the specific test.
RAD-140 is banned at all times by WADA, both in and out of competition, with no threshold. Any detectable amount constitutes a positive test.
How Long Side Effects Can Linger
Clearing the compound from your blood does not mean your body instantly returns to baseline. RAD-140 suppresses your natural testosterone production while you take it, and recovery of normal hormone levels can take weeks to months after stopping, depending on the dose and how long you used it.
Liver stress is the most documented clinical concern. Case reports of drug-induced liver injury from RAD-140 describe recovery periods of 3 to 5 months before liver enzyme levels return to normal, even after the compound itself has left the system. The liver damage occurs during use but the healing process extends far beyond the drug’s presence in your blood. Symptoms like fatigue, dark urine, or jaundice that appear during or shortly after a cycle warrant prompt bloodwork.
Factors That Affect Clearance Speed
Several variables influence how quickly your body eliminates RAD-140:
- Liver function: Since the liver is responsible for metabolizing the compound, any existing liver impairment slows clearance.
- Duration of use: Longer cycles allow the drug to accumulate in tissues, which can extend the tail end of elimination compared to a single dose.
- Body composition: RAD-140 is lipophilic, meaning it has an affinity for fatty tissue. Higher body fat may create a reservoir that releases the compound more slowly.
- Individual metabolism: The clinical data itself showed “variable absorption” between subjects at the same dose, and elimination rates vary similarly from person to person.
There is no reliable way to speed up clearance. Hydration, exercise, and supplement protocols marketed as “PCT detox” do not meaningfully shorten the half-life. Your liver processes the compound at its own enzymatic pace.