What food/drink/herbs/fast programs?

are best to heal and health of the kidneys. i am taking milk thistle 2 caps a day like it says on the bottle. what kind of fast should i do for optimal health. i have the acai berry which when i tried for a wekk lost weight and then went off bc i was going to look for a fast regime which i heard goes best with the acai program. i have been taking many subscribed opiates(t3, percocet) and need to get off them as i am worried about health of my kidneys and liver, any advice would be great. thanks so much