What is Test 400?

Test 400 is a high-concentration testosterone blend that combines multiple testosterone esters into a single injection. It was designed to deliver fast-acting and long-lasting testosterone release in one shot. It's popular with bodybuilders who want to keep injection frequency low while running high testosterone doses.

Quick Facts

How Does It Work?

Test 400 raises testosterone levels in the blood by releasing multiple esters at different rates. The short ester kicks in quickly, while the longer esters keep levels elevated for days. Higher testosterone means more protein synthesis, better nitrogen retention, and faster muscle repair.

What It's Used For

• Bulking cycles — building significant muscle mass
• Strength gains — increasing raw power output
• Base compound — supporting other steroids in a stack

What to Expect

Most users notice increased strength and fullness within the first two weeks. By weeks four to six, noticeable muscle size and recovery improvements are common. Water retention can occur at higher doses due to estrogen conversion, so an aromatase inhibitor is often used alongside it.

Possible Side Effects

• Water retention and bloating
• Increased estrogen levels — can cause gynecomastia if unmanaged
• Natural testosterone suppression after the cycle ends

Cycle & Dosage Notes

A typical cycle runs 10–16 weeks, with injections once or twice per week to keep blood levels stable. Post-cycle therapy (PCT) with Nolvadex or Clomid should begin around two weeks after the last injection. Test 400 stacks well with compounds like Deca, Trenbolone, or Dianabol depending on your goals.

Storage

Keep at room temperature (15–25°C), away from light and moisture. Leave in the original packaging.

This info is for research and educational purposes only. Check the laws in your country before ordering.