/YK11%20Astera/yk11_5mg_2025_05.png)
YK11 5mg Tablets
Description
What is YK11 5?
YK11 is the strong one in this category. It is methylated, so it is run in short blocks like an oral rather than for months like a SARM.
Also sold as YK-11 or myostine.
YK11 is the odd one in this category, because it is not really a SARM. It is a steroidal compound built on a DHT backbone, and it is methylated, which is what lets it survive being swallowed. Alongside androgen receptor activity it is reported to inhibit myostatin, the protein that limits how much muscle you can carry, which is where its reputation comes from.
YK11 5 benefits
- Reported myostatin inhibition alongside androgen receptor activity
- Rapid lean muscle and strength gains at low doses
- Dry gains with no water retention
- Short cycles, which limits total exposure
- One of the strongest compounds in this category per milligram
- 5mg tablets, which is the standard starting dose
YK11 5 dosage
- Starting dose
- 5mg per day, one tablet
- Common range
- 5 to 10mg per day
- Upper end
- 20mg per day, experienced only
- Cycle length
- 4 to 8 weeks
- Post-cycle therapy
- Required, plan it before you start
- Bloodwork
- ALT and AST, plus lipids
5mg is a real dose with this compound. Most people should sit between 5 and 10mg and the upper end is for people who already know how they handle it.
Keep the run short. Four to eight weeks is the window for this one.
Package content
- Tablets
- 50 per box, as 2 strips of 25
- Strength
- 5mg YK11 per tablet
- YK11 per box
- 250mg
- Structure
- Methylated, steroidal
- Brand
- Deus Medical
At 10mg a day one box covers 25 days.
Store below 30°C. Protect from light. Do not freeze. Keep out of reach of children.
Who is YK11 5 for?
Advanced users running a short block who want rapid dry gains.
It is not a first compound. For size from this category with a longer track record, LGD-4033 is the better known quantity.
How to use YK11 5
Swallow with water once daily at the same time. Do not run it alongside another methylated compound and keep alcohol low for the duration.
Frequently asked questions
Do SARMs really need PCT?
Yes. This is the single most repeated piece of bad advice about them, and it costs people months of feeling flat.
SARMs are selective, not non-suppressive. A SERM such as tamoxifen or clomiphene is what restarts your own production.
Is YK11 actually a SARM?
Not really. It is a steroidal compound on a DHT backbone and it is methylated, which puts it structurally closer to an oral steroid than to ostarine or RAD-140.
That matters practically: the cycle length and the bloodwork should look like an oral rather than like a SARM, which means shorter runs and ALT and AST included.
Does it really inhibit myostatin?
That is the claim it is sold on, and it comes largely from cell culture work rather than from human studies.
The mechanism is plausible and the compound is genuinely strong. Whether the myostatin effect is what drives the results, or whether it is simply potent androgen receptor activity, is not settled.
Why are the runs shorter than with other SARMs?
Because YK11 is methylated, which is what makes it work as a tablet and also what makes the liver the limiting factor rather than tolerance.
Four to eight weeks, ALT and AST included in your bloodwork, and no other methylated compound alongside it. Treat it the way you would an oral.
What dose and how long?
5 to 10mg a day for four to eight weeks. Some run up to 20mg, though the returns do not scale with the dose.
Shorter is better with this one. It is potent enough that a four week block does something.
All products are supplied exclusively for research and evaluation purposes and are not positioned as medical treatments or health solutions.
