4Test from Omega Labs is a 10 ml vial holding four testosterone esters at 250 mg combined concentration per ml. The blend includes testosterone cypionate, testosterone propionate, testosterone enanthate and testosterone undecanoate in injectable form.

4 Esters in One 10 ml Vial

Each ml carries 250 mg split across the four compounds. The vial format delivers ten total ml where single-ester options typically offer the same volume at concentrations ranging from 200 mg to 300 mg per ml. Omega Labs has operated in the USA since 2018. Multi-ester blends pair short and long compounds to vary release intervals, and 4Test combines propionate's shorter profile with undecanoate's extended one, bracketed by cypionate and enanthate in between.

• 250 mg per ml across four testosterone esters
• 10 ml vial in injectable solution
• Combines cypionate, propionate, enanthate and undecanoate
• Omega Labs ships this direct

Where Tri Test Blend 350 from Ultima Pharmaceuticals holds three esters at 350 mg per ml, 4Test adds a fourth compound and lowers the total to 250 mg. The count of esters and the spread between their profiles sets one blend apart from another within the Steroid Mix category.

This guide covers testosterone cypionate benefits and explains what testosterone cypionate injection is and how it works.

The testosterone undecanoate vs cypionate guide covers differences between testosterone ester formulations.