AlGore: are you getting it tested for strength somehow, or are you calculating how much is in each serving based on the amount of weed you put into the extract?
Some thoughts and questions for anyone who knows the answers.
I always decarb before use for three reasons;
1. I never smoke, which takes care of this automatically.
2. the only way I can get weed is to grow it myself--I don't even want to risk trying to find it locally and none of our small circle of likewise middle-aged friends who used to have sources can ever seem to find it anymore either. (my state sucks) So the stuff I use is always fairly fresh and has not had a chance to decarb naturally. If you can buy it easily you won't really have to worry about decarbing because it is probably fully cured.
3. I have read, and I certainly don't know if it's true, that you must decarb before combining it with oils (the only extraction method I use) because once the constituents have bonded with the carrier oils, they will not convert anymore. I kind of believe that, however-- I also know that I haven't been decarbing mine quite long enough according to yoda's information, and do not apply much heat during extraction, and I can tell that the final product seems to be a little stronger after further cooking in food than it is when we just take a spoonful of it. That's entirely empirical and could have to do with the foods I'm putting it in helping to optimize the high, but it might also suggest that conversion continues after bonding with the oil. Maybe some of the cannabinoids can't convert after bonding, but others can, dunno. Or maybe it's all hooey.
There's so much information floating around on this subject, and although much of it sounds like the writers know chemistry, they might just know enough to sound like they know chemistry. What I do now is based on collating bits and pieces of what I see and it works, but I'd like to get the best product I can.