YK11

YK-11 is a steroidal compound that acts as a myostatin inhibitor and partial androgen receptor modulator. Myostatin normally puts a cap on how much muscle the body can build, so blocking it lets lean tissue grow beyond that natural limit. This gives YK-11 a more steroid-like anabolic profile than typical SARMs such as ostarine or ligandrol.

As a guide only and not medical advice, first-time users commonly start conservatively around 5mg per day taken with food, running for 4 to 6 weeks and not exceeding 10mg daily. More experienced users sometimes go higher, but YK-11 is a potent compound and doses should be adjusted based on individual response and bloodwork. Always speak with a doctor before starting any cycle.

Yes to both. YK-11 suppresses natural testosterone production, so post-cycle therapy with something like clomiphene or tamoxifen is generally considered essential to restore hormonal balance. It is also a 17-alpha-alkylated compound, meaning it puts real strain on the liver, so pairing it with liver support such as TUDCA or NAC is standard practice among users.

Commonly reported issues include suppressed natural testosterone, liver stress, joint discomfort from rapid myostatin inhibition, and in some predisposed users, hair thinning. Baseline and follow-up bloodwork covering liver enzymes and testosterone is a sensible way to catch problems early rather than relying on how you feel.

YK-11 hits harder. Because it inhibits myostatin as well as targeting androgen receptors, it tends to pack on lean mass and strength faster than ostarine, but it also carries a steeper side effect profile including liver strain and testosterone suppression. Ostarine is the gentler starting point for someone new to SARMs, while YK-11 suits users who already understand PCT and liver support.

Every box of Pharmaqo Labs YK-11 we sell is authentic stock with its own verification check-code so you can confirm it against the manufacturer before use. Orders ship from our UK warehouse via Royal Mail Tracked 24 in plain, discreet packaging, with same-day dispatch if you order before noon on a working day, and most UK customers see their parcel within 1 to 2 working days.