What is Methyl-1-Testosterone 10 (Astera Labs)?
Methyl-1-Testosterone is one of the strongest oral compounds ever sold, and the lethargy it causes is the reason most people who try it do not finish the run.
Also sold as M1T, methyl-1-test or 17a-methyl-1-testosterone.
M1T is 1-testosterone with a 17-alpha-methyl group added so it survives digestion. The result is exceptionally potent, several times testosterone milligram for milligram, and does not aromatise at all. It is also one of the most hepatotoxic orals ever brought to market, which is why the doses and the run lengths are both very short.
Methyl-1-Testosterone benefits
- Exceptionally strong per milligram, with weight and strength moving within days
- Does not aromatise, so no water retention and no estrogen from it
- Dry, hard gains rather than the wet weight the fast bulking orals give
- 10mg tablets, which is a full standard dose
Methyl-1-Testosterone dosage
- Standard
- 10mg per day, one tablet
- Higher end
- 20mg per day, experienced only
- Run alongside
- Testosterone as the base
- Frequency
- Once daily
- Half-life
- Short, dosed once daily in practice
- Cycle length
- 2 to 4 weeks, and that is firm
10mg a day is a real dose here, not a starting point to scale up from. People who treat M1T like Dianabol and take 50mg are the ones who end up in trouble.
Expect lethargy. It is the most consistently reported effect of this compound, it can be severe, and it frequently makes training worse rather than better.
Package content
- Tablets
- 50 per sachet
- Strength
- 10mg methyl-1-testosterone per tablet
- M1T per sachet
- 500mg
- Brand
- Astera Labs
At 10mg a day one sachet covers 50 days, far beyond what a 2 to 4 week run needs.
Store below 30°C. Protect from light. Do not freeze. Keep out of reach of children.
Who is Methyl-1-Testosterone for?
Experienced users who want a very short, very strong block and already know how they handle harsh orals. This is not a compound to meet early.
It is the wrong choice for anyone who needs to train well through the run, because the lethargy often makes that impossible. If dry strength over four weeks is the goal, methyldrostanolone does a similar job with a better-documented track record.
How to use Methyl-1-Testosterone
Swallow with water, once daily at the same time. Alcohol is out for the duration, and no other alkylated oral goes alongside it.




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