Oils going rancid isn’t really the issue. We are injecting this oil, the main goal is sterility and hormone potency.
I would never recommend anyone injecting ugl gear without first heating the vial one time at 145F for at least 30-40 minutes until that thing is hot to make sure any bacteria are neutralized.
The hormone is gonna be fine, the oil might not taste that great, but it will serve its purpose and that’s to suspend the hormone so we can inject it.
Even if the oil is older, rancid, it doesn’t mean a thing as long as it is sterile and the hormone is potent.
We aren’t after some great tasting oil, we’re trying to get a hormone into our body without causing an infection.
If you’re worried about oil shelf life, you will want to stick with a saturated oil like MCT or Mig840, even extra refined olive oil that is monosaturated has a long shelf life. Polysaturated oils like grapeseed aren’t gonna be tasty as long, but if it’s sterile and the hormone does it’s job, there shouldn’t be a problem.