I guess I'm confused about decarboxylation... sounds like you heat cannabis sativa and it turns THCa into THC? Or just that it is more effective anti cancer if you heat it first (rather than burn it). Is this vaping or just cooking?
It's neither vaping nor cooking - it's decarbing!
The THC doesn't vaporize until about 350* F, which is why you decarb at a lower temp (so you don't lose the THC!). Decarbing happens automatically when you smoke or vape from the heat source. It will help the THC become more readily available to the human body so will help maximize the effects when consuming edibles.