What is the best testosterone for am old guy 49 years young

Test is test. Different esters determine dosing intervals and how long it will last. If you use a short ester like prop, you could pin a little every day whereas if you went with something like test c, pinning once or twice a week is sufficient.

If you're asking for a source, go to the underground section and take your time to read some of the threads. Pay attention to whether the gear has been third party tested and if the source seems to have happy customers commenting or if the source is being shit on by members, there's likely a good reason for it and probably a good indication to steer clear and keep looking for a better option.

Good luck and welcome to meso.
 
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