SostaMix 300 Phar Labs Premium United kingdom
SostaMix 300 Phar Labs Premium United kingdom
Product Overview
SostaMix 300 by Phar Labs Premium is a multi-ester testosterone blend formulated to provide both fast-acting and sustained testosterone release. Designed for structured hormone and performance-focused protocols, this injectable blend combines five different testosterone esters to support stable androgen activity over time.
Widely discussed across fitness and bodybuilding communities in the United Kingdom—including London, Manchester, Birmingham, Liverpool, Leeds, Glasgow, Bristol, Nottingham, and Newcastle—SostaMix 300 is commonly referenced for its balanced release profile and advanced testosterone blend formulation.
Manufactured by Phar Labs, this product is available in either 10 x 1mL ampoules or a 10mL vial with a total concentration of 300mg/mL.
Key Features
- Multi-ester testosterone blend
- 300mg/mL injectable formulation
- Available in 10 ampoules or 10mL vial
- Designed for sustained hormone release
- Phar Labs Premium pharmaceutical-style manufacturing
- Commonly referenced in performance and hormone protocols
Testosterone Blend Composition
Each 1mL contains:
- Testosterone Propionate – 30mg
- Testosterone Isocaproate – 60mg
- Testosterone Phenylpropionate – 60mg
- Testosterone Caproate – 100mg
- Testosterone Decanoate – 50mg
How It Works
SostaMix 300 combines both short and long-acting testosterone esters to create a staggered release pattern. Short esters begin acting more rapidly, while longer esters provide extended hormone activity and stability over time.
Once active, testosterone interacts with androgen receptors throughout the body and supports processes linked to hormonal balance, recovery, strength, and overall androgenic activity within supervised protocols.
Storage Instructions
Store in a cool, dry place away from direct sunlight, heat, and moisture. Do not freeze. Keep tightly sealed and out of reach of children.





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