Description
Liquid YK-11 is a 30mL bottle of YK-11 at 10mg/mL, tested to 99.04% purity. YK-11 is a steroidal androgen receptor partial agonist. It’s sold for laboratory research only.
What is YK-11?
YK-11 is a steroidal compound built on a dihydrotestosterone backbone, first described by Japanese researchers in 2011. It’s usually sold next to SARMs, but it’s a steroid and only a partial agonist at the androgen receptor.
Its reported trait is raising follistatin in muscle cells, which ties it to myostatin research.
How YK-11 works
YK-11 binds the androgen receptor but doesn’t trigger the full shape change that DHT does, so it activates only part of the usual gene program. That’s why it’s called a partial agonist.
In muscle cells it raised follistatin, a protein that blocks myostatin, the signal that limits muscle growth. When the researchers blocked follistatin, YK-11’s effect on muscle cell differentiation went away.
Liquid YK-11 product details
- Compound: YK-11
- Also known as: YK11
- CAS number: 1370003-76-1
- Molecular formula: C25H34O6
- Molecular weight: 430.5 g/mol
- Structure: steroidal (DHT-derived) structure
- Concentration: 10mg/mL
- Volume: 30mL glass bottle (300mg total)
- Carrier: USP-grade PEG-400
- Included: graduated 1mL glass pipette
- Purity: 99.04% by HPLC, identity by mass spectrometry
- WADA status: prohibited, class S1.2
- Tested by: MZ Biolabs, Tucson, Arizona
- SKU: STL-YK11-L
- Intended use: laboratory research only
YK-11 research findings
Kanno and colleagues showed in Biological and Pharmaceutical Bulletin in 2013 that YK-11 drove muscle cell differentiation in C2C12 myoblasts more strongly than DHT and raised follistatin expression.
A 2018 study reported effects on bone-forming osteoblast cells as well. There are no human trials.
Every study mentioned here is indexed on PubMed, the free database run by the NIH. Try this YK-11 search.
Where YK-11 fits in the range
Quick context: YK-11 is a steroidal partial agonist linked to follistatin in cell studies. Other compounds in the same area:
- Ostarine is the most studied SARM, with human trial data on muscle wasting
- LGD-4033 binds the androgen receptor very tightly and has a phase 1 study in healthy men
- RAD-140 is a potent nonsteroidal SARM from Radius Health, later tested in breast cancer
- RAD-150 is a benzoate ester of RAD-140 with no published studies of its own
- S4 (andarine) is an early partial-agonist SARM from GTx with rat data on muscle and bone
All of them bind the androgen receptor, but affinity, selectivity and the amount of published data differ a lot. Compare them in our liquid SARMs.
How Sports Technology Labs tests Liquid YK-11
The current certificate of analysis shows 99.04% by HPLC. The testing is done by MZ Biolabs, an independent lab in Tucson, Arizona, which also checks identity by mass spectrometry.
The COA image is in the product gallery at the top of this page, so you can read the batch result before you order.
HPLC and mass spec answer different questions. HPLC tells you what share of the sample is the main compound. Mass spec tells you the compound is the right molecule. A COA with only one of them leaves a gap.
If anything arrives wrong, the 60-day money-back guarantee covers it.
Measuring Liquid YK-11 accurately
Liquid YK-11 comes in a 30mL glass bottle at 10mg/mL, so there are 300mg of YK-11 in the bottle. The carrier is USP-grade PEG-400, and a 1mL glass pipette is included.
Because the strength is fixed, volume converts straight to mass. 1mL is 10mg, 0.25mL is 2.5mg. PEG-400 is viscous, so draw slowly and let the pipette drain fully.
Keeping Liquid YK-11 stable
Store it at room temperature or cooler, capped, away from light and heat. There’s no need to refrigerate it, and cold makes the PEG-400 even thicker to measure.
Label the date you opened the bottle so your records match your results.
Related to Liquid YK-11
- Liquid RAD-150 (TLB-150) 10mg/mL, an SARM ester ready to measure
- Liquid SR-9009 (Stenabolic) 20mg/mL, an REV-ERB agonist ready to measure
- Liquid RU-58841 50mg/mL, an antiandrogen ready to measure
- Liquid S23 20mg/mL, an SARM ready to measure
- Liquid Ligandrol (LGD-4033) 10mg/mL, an SARM ready to measure
Browse the full list in our liquid SARMs, or go back to the Sports Technology Labs home page to see every category.
Liquid YK-11 questions and answers
How much YK-11 is in a bottle of Liquid YK-11?
300mg: 30mL at 10mg/mL.
Is Liquid YK-11 in stock?
Yes, this solution is in stock today.
Where can I buy Liquid YK-11?
Right here at Sports Technology Labs. Add it to your cart on this page and check out. Shipping is free on every order.
Is there a discount on Liquid YK-11?
Yes. Pay with crypto at checkout and you get 15% off your order.
Where is the Liquid YK-11 lab report?
In the product gallery. MZ Biolabs tested the batch and the posted purity is 99.04%.
Order Liquid YK-11 online today
Ready to order? This solution costs $62.99, it’s in stock and shipping is free. Paying in crypto takes 15% off.
Compounds that fit the same study sit in our liquid SARMs.
Sports Technology Labs sells this product for laboratory and in-vitro research only. It isn’t a medicine, food or dietary supplement, and it must not be given to people or animals. The FDA has not evaluated any statement on this page. YK-11 is on the World Anti-Doping Agency prohibited list (S1.2, anabolic agents), so tested athletes should not handle it outside a lab. Buyers must be 21 or older.
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