Storing Testosterone

Stated storage

Room temperature, out of direct light. Crystallisation in cold conditions is a physical change, not degradation, and redissolves with gentle warming.

Half-life

Determined entirely by the ester. Propionate roughly 0.8 days; enanthate about 4.5 days; cypionate about 5 days; undecanoate substantially longer.

On arrival

Testosterone is supplied refrigerated, so it should arrive cold. Where an item arrives outside the stated conditions the batch documentation is the reference point, not the listing.