While yucca is definitely a safer alternative to synthetic steroids, it should be used in moderation. It should be used to treat a specific condition rather than for everyday, regular use. If it needs to be used over a longer timeframe, make sure to give your dog a couple of days off every week from yucca. Too much yucca can irritate the digestive tract and may reverse its benefits, according to Herbs for Pets. ( Dosing for the dried and powdered root is a 1/2 teaspoon per pound of food. But check with your holistic vet if you are ever unsure.)
Minerals have many roles in the body, which include acting as beneficial antioxidants.  Selenium is an essential nutrient, that should be present in trace amounts in the diet.  Like other antioxidants, selenium acts as a cofactor to neutralize free radicals.  Other minerals act as essential cofactors to biological processes relating to skin health. Zinc plays a crucial role in protein synthesis, which aids in maintaining elasticity of skin. By including zinc in the diet it will not only aid in the development of collagen and wound healing, but it will also prevent the skin from becoming dry and flaky.  Copper is involved in multiple enzymatic pathways.  In dogs, a deficiency in copper results in incomplete keratinization leading to dry skin and hypopigmentation .  The complicated combination of trace minerals in the diet are a key component of skin health and a part of a complete and balanced diet.