Grapfruit seed extract, NOT GRAPFRUIT JUICE, the Grapfruit seed extract really increases its potency. I would like say depending how much u use it easily can make 4x stronger. Grapfruit seed extract intensify's a lot of narcotics.
Actually yea but grapefruit seed extract is at least 6 times more potent then just the juice. It's like 20 bucks for the grapfruit seed extract but it at least makes it so much stronger and last longer. I would say it turns a 2mg to at least a 5 mg if not more. Definitely works, I have it on...