Testing weed for potency is great life insurance — literally. That’s because you’ve really got to know how much THC (which is the active ingredient in marijuana) there is in that strain of weed you plan to pop. Just because you know it’s Pink Stardust or a Satori doesn’t mean you don’t have to double check. Heck, your health’s on the line, so do the really smart thing and get one of those at-home, easy-to-use marijuana test kits. They’re not cheap, but who wants to place a price on your health?