Yes proper nutrition , you can get vit D from foods too like fish, eggs, fortified milk,cereal and orange juice, mushroom as well to maintain normal blood levels of calcium and phosphorus. Vitamin D helps the body absorb calcium, which forms and maintains strong bones. For skin it should be Vit E. You can juice fruits and veges rich in Vit E or eat it like mangoes, tomatoes avocados and kiwi.
You can try this:
2 large carrots, l celery stalk, 1 apple, l cucumberPut all ingredients in your juicer. Cucumbers is good for the skin when consumed and when used topically. Cucumbers are rich in silica, important for the complexion and skin elasticity. Try to buy organic cucumbers for juicing, so that you can juice with the peel on. Most of the silica is in the peel. If you can’t buy organic, remove the peel before juicing.