A small, friendly reminder:

Injectable hormones are suspended in ~~castor oil~~ a carrier oil. ~~Castor oil~~ Carrier oils are really good at keeping those hormones dissolved.

But ~~castor oil~~ carrier oils go rancid over the course of a few years, depending on what type they are. Faster if you don't keep it in a dark place. And rancid ~~castor oil~~ carrier oils don't work properly, and can even hurt you.

So, please keep an eye on the expiration date of any vial of hormones you have or get, and discard anything past its expiration date promptly.

Because you can't tell if ~~castor oil~~ carrier oils have gone rancid by sight. Only smell or texture.

And you can't smell or feel it in a sealed vial.

Edit: I was not entirely correct here--injectable hormones use a variety of oils, some of which are longer-lived than castor.

That being said, the core point remains: Please take the expiration dates on your injectable hormones seriously, especially if you have other comorbidities that can interact with injections.