Shop online today for green food products and get free Canadian shipping on orders over $59.99. Vegetables that are darker in color are typically said to be a source of high fiber. Some of those high fiber foods include broccoli, swiss chard, artichoke and spinach. Nature’s Source offers a variety of green food supplements for adults, children and athletes. Mix green food powder and liquid supplements into your water, juice or smoothie. Nature’s Source also carries green food supplements in tablet form. Buy greens from Nature’s Source today!