Description

YK-11 (Myostine)

YK-11 Overview

YK-11 is a muscle-focused compound known for its anabolic activity and effects on the androgen receptor, follistatin, and myostatin-related pathways. It has gained attention among people interested in muscle growth, strength, and muscle preservation.

What makes YK-11 stand out is its reported ability to increase follistatin expression, giving it a distinctive profile compared with many other compounds in the SARM category.

Product Information

YK-11 is a synthetic steroidal compound that activates the androgen receptor. Research has shown that YK-11 can increase follistatin expression and promote markers involved in muscle-cell development.

Follistatin is closely connected with the regulation of myostatin, a protein involved in controlling skeletal-muscle growth. This connection is one of the main reasons YK-11 has attracted attention for its muscle-building and muscle-preservation effects.

How Does YK-11 Work?

YK-11 activates androgen-receptor signaling and increases follistatin expression. In muscle cells, these effects are associated with increased activity of proteins involved in muscle-cell development. [1]

YK-11 Benefits & Effects

Boosts Muscle Growth

YK-11 is associated with anabolic activity and pathways involved in muscle development. Its androgen-receptor activity and influence on follistatin have made it particularly popular among compounds associated with muscle-building effects.

Promotes Follistatin Expression

One of YK-11’s most distinctive characteristics is its ability to increase follistatin expression. Follistatin helps regulate proteins involved in muscle growth, including myostatin, making this pathway central to YK-11’s profile. [1]

Targets the Myostatin Pathway

YK-11’s influence on follistatin connects it with the myostatin pathway. Since myostatin acts as a regulator of skeletal-muscle growth, this pathway is an important focus when examining YK-11’s muscle-related effects.

Helps Preserve Muscle Mass

YK-11 has also been investigated in relation to muscle wasting. In a mouse model involving bacterial sepsis, YK-11 was associated with changes in myostatin-related signaling and preservation of muscle tissue. [2]

Supports Muscle-Cell Development

Research in C2C12 muscle cells found that YK-11 increased markers including MyoD, Myf5, and myogenin, which are involved in muscle-cell differentiation and development. [1]

YK-11 Side Effects

Reported concerns associated with YK-11 and SARM-type compounds include hormonal suppression, changes in cholesterol levels, acne, liver-related effects, and other androgenic effects.

The FDA has warned that products marketed as SARMs have been associated with serious adverse effects, including liver injury and increased cardiovascular risk. [3]

YK-11 Dosage

Online sources commonly report 5–10 mg per day for YK-11, while some bodybuilding-oriented sources publish ranges of 10–15 mg per day. These figures reflect reported non-medical use rather than a clinically established dosing standard. [4]

Because products and formulations can vary substantially, online dosing figures should not be treated as a universally safe dose.

Where to Buy YK-11?

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If you choose to explore a product listing, you can use the affiliate links provided above and review the seller’s product information and testing details carefully.

Disclaimer: The information on Purerawz is provided for educational and informational purposes only. YK-11 is not FDA-approved for human use. The information presented here should not be considered medical advice or a recommendation to use YK-11.