Andarine S4

Andarine (S4) is a selective androgen receptor modulator, not a steroid. It binds to androgen receptors in muscle and bone tissue with a fairly high degree of selectivity, which is why it is favoured for holding onto lean muscle and strength while eating in a calorie deficit. It has a short half-life compared with most SARMs, so it is typically split into two doses a day rather than taken once.

As a general guide and not medical advice, users commonly split the daily amount into a morning and evening dose rather than one large dose, given the compound's short half-life. Many run it across a cutting block of several weeks. Always start conservatively and judge tolerance before increasing, and speak to a doctor before use.

The side effect most associated with S4 is a temporary yellow tint to vision or slower adjustment to darkness, which tends to fade once the dose is lowered or the compound is stopped. Testosterone suppression, mild liver enzyme changes and a drop in HDL cholesterol have also been reported. This is why liver support and bloodwork before and after a cycle are commonly recommended.

Andarine does suppress natural testosterone production to some degree, so most users run a post-cycle therapy protocol rather than stopping cold. This is general information rather than a prescription, and anyone considering PCT compounds should get individual guidance from a healthcare professional.

Andarine is more androgenic in its effect on muscle and strength than Cardarine, which works through a different pathway focused on endurance and fat metabolism rather than the androgen receptor. Compared with Ostarine, S4 is generally regarded as stronger for a cut but carries the added vision-related side effect that Ostarine does not typically produce. Many stack the three differently depending on whether the goal is pure fat loss, muscle retention or endurance.

Every batch of Syncom Labs Andarine S4 sold here is authentic stock with a verification code printed on the box so you can confirm it against the manufacturer. Orders are dispatched from the UK on Royal Mail Tracked 24 in plain, unmarked packaging, with same-day dispatch for orders placed before midday on a working day. Most customers across the UK receive their parcel within one to two working days.