As long as the pardon met the conditions of the Constitution, as discussed below, it would have to be found within the President's powers. Besides, it would require a case be first brought to the Court through appeal and the plaintiff would have to show injury from the pardon. I can't imagine what that would include.
Organic fruits and vegetables also contain higher amounts of Vitamin A, Vitamin C, and sulfur, which all boost liver detoxification and cleansing. Broccoli, Brussels sprouts, kale, collards, apples, onions, garlic, and squash are all great choices. Also see: 10 Foods to Cleanse and Care for Your Liver.
Often used in homemade cleansers (juices or smoothies), ginger is a natural way to detox your liver. Consuming too many fatty proteins can also lead to liver damage. Healthy options of proteins (that also fill you up) include beans and lentils. Now fish oil can be tricky and may not be for everyone.