Quote Originally Posted by PaleoEdibles
In the oven, you are going to want to do it for longer then 20 minutes, depending on how much bud you have, itâ??s degree of dryness, and your chosen temp. 325 to 350 is well known to be safe. At these temps, 25 minutes or more is more than likely necessary.
If the graph from the journal of chromatography that I posted a link to is correct, 325 for 25 minutes is too much and will reduce potency.

Thanks for posting this great article on decarboxylation.

The graph I posted implies that the best method is 252F for 30 minutes, with potency reductions after 30 minutes, but this article here says 248F for 60 minutes. So I think I will try 250F for 40-45 minutes next time.

Regarding the coconut-oil extraction, I still think if you are "frying" the herb and it is turning brown, that is gross and means the oil is too hot and is reducing potency. I fucked up coconut oil like that the first time I tried it. Now when I make canna-coconut oil, after 2 or 3 washes with water, it is a beautiful light sea green color. Since all of the cannabinoids we want to extract are soluble in coconut oil at room temperature anyway, why not just cook it longer at a lower temperature (like 100C) and end up with a much cleaner, prettier, tastier product with no chance of reduced potency