See our latest HPLC-Assay: Purity (3rd party lab test) on YK-11
1 bottle (30mL) of YK-11, Myostine, dosed at 10mg/mL (newly increased dose):
- Increase Muscle Tissue
- Increase Power
- Neuroprotective
- Cell Age Reducing
- Myostatin Inhibition
Stacks well with:
MK-677, RAD140, S-23, LGD-4033.
What Is YK11?
YK-11 is an Androgen Receptor Modulator.
Although YK-11 does not act as an agonist towards the prostate, it does carry with it a similar effect to causing stress on the liver. This is due to the 4 methyl (CH3) groups in its structure. Supplements like Milk Thistle help aide and mitigate the effects.
Application Of YK11

Justin Pace –
After one week of 10mg a day, my rat was asked how and the F are you getting so big so quick. Guys this stuff is no joke if you’re like my rat where he can get stronger but muscles get bigger slower. Absolutely amazing supplement for insane muscle gain.
connormccabe667 –
Gained awesome results! got exactly what I wanted out of it. Would definitely recommend
Luke Mackay (verified owner) –
This is a great product. I didn’t expect such solid results. It’s difficult to put in a review how great this stuff is. My research animal began obtaining quality gains within weeks. Give it a day or two and things start getting interesting. The research animal experienced no ostensible effects other than fuller muscles. He also had an increase in his lifts and set performance. He had a dose of 10mg per day. Highly recommended.
Rilee W –
I’m a F25. I’ve tried almost all of Rat’s Army products over the course of a year.
I used YK-11 for about six weeks. Originally my husband planned to cycle this, but I decided to give it a go instead. Coming from a female, I will say this is not one of my favorite products, however, it will yield results.
My strength was incredible and I started hitting PRs each week. That said, it left me feeling extremely bloated and sluggish. Even more so than LGD
If you can get past the bloated feelings and appearance, you can make some awesome strength gains with this stuff.
Mason H (verified owner) –
If you’re looking for dry, lean gains, stacking this with RAD 140 is by far the best option. Strength shot through the roof and noticed the visible changes becoming apparent around week 5. Very versatile compound for some serious gains.
Edward Archer (verified owner) –
On time shipping.
Knowledgeable staff.
Great customer service.
Rats Army lifer here!