What is Testosterone (Test 300)?

Test 300 is a high-concentration testosterone blend dosed at 300mg/ml. Testosterone is the foundation of most performance cycles and the compound everything else is measured against. It was originally developed to treat low testosterone in men, but it became a staple in bodybuilding and strength sports.

Quick Facts

How Does It Work?

Testosterone binds to androgen receptors throughout the body, signalling muscle cells to grow and recover faster. It also boosts red blood cell production and improves nitrogen retention in muscle tissue. The result is more muscle, better recovery, and increased strength over time.

What It's Used For

• Building lean muscle mass during a bulk
• Maintaining muscle on a calorie deficit
• Improving strength and overall performance

What to Expect

Most users start noticing strength gains within the first two to three weeks. Muscle fullness and size increases steadily throughout the cycle. Recovery between sessions also improves noticeably.

Possible Side Effects

• Water retention and bloating, especially at higher doses
• Increased oestrogen levels, which can cause gynecomastia without an aromatase inhibitor
• Natural testosterone suppression during and after the cycle

Cycle & Dosage Notes

A typical cycle runs 10–16 weeks, with injections once or twice per week to keep blood levels steady. Post-cycle therapy (PCT) with Nolvadex or Clomid is essential to help restart natural testosterone production. Test 300 stacks well with compounds like Deca, Equipoise, or Masteron 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.