Short answer: take RAD-140 (testolone) at the same time every day, morning or night; the time of day makes little difference. Its half-life is about 45 hours, which the researchers said “supported once-daily dosing” in the only human trial (LoRusso 2022). Pick the time that suits your stomach and sleep: users most often report an upset stomach when taking liquids on an empty stomach, and trouble falling asleep when taking it right before bed.
RAD-140 morning or night: what the data say
| Question | Evidence |
|---|---|
| Half-life | 44.7 hours in the Phase 1 trial (postmenopausal women with breast cancer, 50–150 mg once daily) (LoRusso 2022) |
| Peak after a dose | Urine levels peaked 2–6 hours after intake in healthy men given micro-doses (Wagener 2022) |
| Morning vs night | Never compared in a study |
| Stomach side effects | Vomiting and decreased appetite in 27.3% of trial patients each (advanced cancer, high doses) |
| Sleep | Not among the common side effects listed in the trial; insomnia at night is a user report |
44.7 hours
half-life in the Phase 1 trial
2–6 hours
urine levels peaked after intake
27.3%
vomiting and decreased appetite, each (high doses)
With a half-life near two days, blood levels change little between morning and evening, so what you gain by timing is convenience and comfort, not results. The sections below compare the two.
Source: Sarmguide compound database; RAD-140 value: A First-in-Human Phase 1 Study of a Novel Selective Androgen Receptor Modulator (SARM), RAD140, in ER+/HER2- Metastatic Breast Cancer (2022).
Morning Pros And Cons
Let’s go over the pros and cons of taking RAD 140 in the morning (the time you wake up).
Pros
There’s really only one major benefit of taking RAD 140 as soon as you wake up and that’s simplicity.
Taking Testolone everyday as soon as you wake up will make it really hard for you to miss a dosage.
Apart from that, there’s no proven benefit of taking it in the morning. The Phase 1 trial gave it once a day but did not compare times.
Cons
Liquid RAD-140 products are often dissolved in alcohol or other solvents. Many users report an upset stomach when they take it right after waking, on an empty stomach (anecdotal), and eating something first is the usual workaround. In the Phase 1 trial, at doses far higher than users take, vomiting and loss of appetite each affected 27% of patients.
Users say capsules cause fewer stomach complaints, but you can’t adjust the dose as finely as with a liquid.
Read more in our SARMs pills vs liquid guide and how to take liquid SARMs.
Night Pros And Cons
Now that we’ve covered the pros and cons of taking RAD 140 in the morning, let’s do the same for taking it before going to bed.
Pros
You’re very unlikely to ever miss a dosage if you have your RAD 140 by your bed and just take a dosage right before going to sleep.
On top of that, your stomach won’t be empty (unless you’re fasting) so there’s no risk of upsetting your stomach.
Cons
Some users report a hard time falling asleep when taking testolone right before bed (anecdotal; insomnia was not among the trial’s common side effects). Taking it earlier in the evening is how they deal with it.
Optimal Time To Take RAD 140
There is no proven “optimal” time to take RAD-140. With a half-life of about 45 hours, taking it in the morning won’t change results compared with taking it in the evening. What does matter:
- Consistency: the same time each day keeps levels steady and makes missed doses less likely.
- Comfort: if your stomach is upset in the morning, take it with food or later in the day; if you sleep badly, take it earlier.
- Splitting is unnecessary: a once-daily schedule was what the trial used, and the long half-life gives no reason to split a dose.
- The dose matters far more than the timing. RAD-140 has never been tested for muscle in people, and liver-enzyme rises were the most common side effect in the trial (AST up in 59% and ALT in 45%). See the RAD-140 dosage guide and are SARMs liver toxic.
Conclusion
RAD-140 in the morning or at night: it makes little difference to blood levels, because the half-life is about 45 hours. Pick a time that works with your stomach and sleep and stick to it every day. If you are weighing RAD-140 at all, read what is known about its human data and risks first, and compare it with LGD-4033 in RAD-140 vs LGD-4033.
Frequently asked questions
Should I take RAD-140 in the morning or at night?
No difference shownEvidence: Human data
Its half-life is about 45 hours, so blood levels change little over the day. No study has compared morning and night dosing.
What is the best time of day to take RAD-140?
No proven best timeEvidence: Limited
The only human trial gave it once daily and did not compare times.
Can RAD-140 cause insomnia?
Users report it; not in trialEvidence: User reports
Some users report trouble falling asleep when they take it right before bed. Insomnia was not among the common side effects listed in the Phase 1 trial, so this is anecdotal.
Should RAD-140 be taken with food?
Not studiedEvidence: User reports
Users often report an upset stomach when taking liquid RAD-140 on an empty stomach. In the trial, at high doses, vomiting and loss of appetite each affected about 27% of patients.
Should I split my RAD-140 dose?
No reason from the dataEvidence: Human data
With a 45-hour half-life, the only trial used once-daily dosing, and no study has tested split doses.
How long does RAD-140 take to kick in?
Not measuredEvidence: Human data
Not measured for muscle or strength, because no human study has tested those. In micro-dose studies, urine levels peaked 2–6 hours after a dose; with a 45-hour half-life, steady levels take several days of daily dosing to reach.
