The two compounds worth checking before you buy
Masteron and Primobolan are among the most substituted compounds in circulation, which makes a finished product assay on a sealed vial worth more than any claim. Every report behind these four preparations is set out here.
The compounds
What is stocked, and what it costs
Cost per 100 mg is computed from the live price, the concentration and the vial size, so preparations at different strengths compare directly.
| Product | Concentration | Vial | Total compound | Price | Per 100 mg | Lab reports | Stock |
|---|---|---|---|---|---|---|---|
| Quanta Pharma Masteron Enanthate | 200 mg/ml | 10 ml | 2000 mg | £48 | £2.40 | 4 | in stock |
| Quanta Pharma Masteron Propionate | 100 mg/ml | 10 ml | 1000 mg | £34 | £3.40 | 1 | in stock |
| Quanta Pharma Primobolan 200mg | 200 mg/ml | 10 ml | 2000 mg | £115 | £5.75 | 2 | in stock |
| Quanta Pharma Primobolan 100mg | 100 mg/ml | 10 ml | 1000 mg | £65 | £6.50 | 3 | in stock |
Prices read from the store on 2026-09-01.
Why verification matters more for these two
Both compounds are expensive to produce relative to what they can be substituted with, which is exactly the condition that produces counterfeiting. A raw material certificate says the powder was genuine at some point. A finished product assay on a sealed vial says what is actually in the vial being sold. The second is the one that answers the question.