Definition of supernal. 1  1a : being or coming from on highb : heavenly, ethereal supernal melodiesc : superlatively good supernal trumpet playing. 2  2 : located in or belonging to the sky.
Organic Foods. Organic eggs, oranges, grapefruit, lemons, vegetable juices, beef liver and kidney and sprouts derived from organic seeds are believed to increase thyroid activity, according to The Natural Health Place, a healthy living website.
Kastner recommends that adults obtain 15 mcg of vitamin D daily to increase kidney function. Foods rich in vitamin D include fortified margarine, eggs, fortified cereals, fortified yogurt, fortified orange juice, milk, salmon, canned tuna in water and beef liver.