4-Andro

4-Andro Prohormones are compounds that convert to testosterone in the body, making them a popular choice for users focused on building size and strength. Often referred to as bulking prohormones, 4-Andros are known for delivering noticeable muscle mass and strength gains compared to 1-Andros, which are typically geared more toward lean, dry muscle.

Because they convert to testosterone, 4-Andros can lead to slightly higher water retention, giving a fuller or “wetter” look rather than the dry, defined appearance associated with 1-Andros. This effect can often be balanced by stacking a 4-Andro with an Epiandro or a 19-Nor compound.

Many users also report increased power, aggression in the gym, and improved libido while running a 4-Andro cycle. In some cases, excess estrogen conversion can occur, which may present as lethargy, mood changes, reduced libido, or nipple sensitivity. If these symptoms appear, adding an estrogen support supplement such as Arimistane for a short period is typically enough to bring things back into balance.

If your goal is to pack on muscle mass, boost strength, and push heavier weights, 4-Andro Prohormones are a go-to option for serious bulking cycles.