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.
Garlic contains both selenium and allicin, two compounds found in foods that are good for your liver. It also contains sulfur, which helps your liver detoxify; sulphur is also found in onions. Green tea has many health benefits, and they don't exclude your liver. This tea contains catechins, a type of antioxidant.