I know this has been touched on however I couldn't find an answer to my question. I have a tolerance to opioids and wants to potentiate. I can't find GFJ anywhere so bought grapefruit seed extract which contains 250mg of grapefruit seed extract per capsule. First, how many should I take. Second, how long do I take the extract before the Percocet. And finally the bottle said to take the extract with food... does this matter or will taking it with food just make the Percocet less potent? Any help would be greatly appreciated and if there is anything scientific to back it up that would be of great help as well. Thank you all for your time 

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