Bottom-line, because organic foods are free of the pesticides and toxins that have become commonplace in conventional food-growing processes today, they are easier for the liver to process and therefore preferable, especially during a liver detox program.
However, cost and availability of some items may dictate the extent to which you are able to prepare completely organic meals, snacks and beverages.
My philosophy is this: some is better than none incorporate the organic fruits and vegetables, and organically raised meat products, as availability and your pocketbook allow.
The recipes in Eating Clean: 100 Appetizing Solutions Wheat-free & Dairy free call for organic and fresh produce, as well as organically raised meats, but their deliciousness does not necessarily rely on that quality.
Try them and see for yourself!