What Test 350 is
Test 350 is the same idea as Test 400 executed at a lower concentration. It is a multi-ester testosterone blend supplying 350 mg of total testosterone ester per millilitre. As with any blend, the figure on the label is combined ester content rather than delivered hormone, and the several esters present each have their own release curve.
- Concentration
- 350 mg/ml
- Number of esters
- Several
- Esters present
- Multiple testosterone esters
- Presentation
- Multi-dose vial
- Storage
- Room temperature, protected from light
Concentration and solvent
At 350 mg/ml the preparation still sits well above the 250 mg/ml that single esters are usually supplied at, so it carries a correspondingly higher solvent load. Benzyl benzoate rather than the hormone is what is generally associated with post-injection irritation in high-concentration preparations, which is why the same compound at a lower concentration is often reported as more comfortable.
- Quanta Pharma Test 350out of stock£32
Availability checked 2026-09-01. The product page carries live stock.
The other blends
Common questions
What is the difference between Test 350 and Test 400?
Concentration. Both are multi-ester testosterone blends; Test 400 supplies 400 mg of combined esters per millilitre and Test 350 supplies 350 mg. The higher concentration needs more solvent to keep the esters in solution.
Why do high-concentration blends sting?
Solvent load rather than hormone content. Reaching concentrations above roughly 250 mg/ml requires more benzyl benzoate, and that is the component most associated with post-injection irritation.
Does this page give dosing information for Test 350?
No. This is a reference resource covering composition, concentration and storage. It does not provide dosing protocols or administration schedules.