I have to avoid vitamin d because of sarcoidosis how?

You have to avoid foods or supplements containing calcium or Vitamin D because of a condition called Hypercalcemia that is sometimes a factor in Sarcoidosis that causes higher than normal amount of Vitamin D in the blood.

A comprehensive treatment plan for sarcoidosis may include a range of complementary and alternative therapies. Ask your team of health care providers about the best ways to incorporate these therapies into your overall treatment plan. Always tell your health care provider about the herbs and supplements you are using or considering using, as some supplements may interfere with conventional treatments.

Following these nutritional tips may help reduce symptoms:

Try to eliminate potential food allergens, including dairy, wheat (gluten), corn, preservatives, and food additives. Your health care provider may want to test for food sensitivities.
Eat antioxidant foods, including fruits (such as blueberries, cherries, and tomatoes), and vegetables (such as squash and bell peppers).

Cut down on oxalate-containing foods, such as spinach, rhubarb, beets, nuts, chocolate, black tea, wheat bran, strawberries, and beans.

Include foods rich in magnesium and low in calcium, such as barley, bran, corn, rye, oats, soy, brown rice, avocado, banana, and potato.

Avoid refined foods, such as white breads, pastas, and especially sugar.

Eat fewer red meats and more lean meats, cold-water fish, tofu (soy, if no allergy) or beans for protein.

Use healthy oils, such as olive oil or vegetable oil.
Reduce or eliminate trans-fatty acids, found in commercially baked goods such as cookies, crackers, cakes, French fries, onion rings, donuts, processed foods, and margarine.

Avoid coffee and other stimulants, alcohol, and tobacco.
Drink 6 - 8 glasses of filtered water daily.
Exercise at least 30 minutes daily, five days a week.

A daily multivitamin, containing the antioxidant vitamins A, C, E, the B-complex vitamins, and trace minerals such as magnesium, calcium, zinc, and selenium.
Omega-3 fatty acids, such as fish oil, 1 - 2 capsules or 1 - 3 tablespoonfuls oil, one to three times daily, to help decrease inflammation and help with immunity.
.
Vitamin C, 500 - 1,000 mg, one to three times daily, as an antioxidant and for immune support.
N-acetyl cysteine, 200 mg daily, for antioxidant effects. Higher doses may be needed, so check with your health care provider.
Probiotic supplement (containing Lactobacillus acidophilus ), 5 - 10 billion CFUs (colony forming units) a day, when needed for maintenance of gastrointestinal and immune health. You should refrigerate your probiotic supplements for best results.
Coenzyme Q10, 100 - 200 mg at bedtime, for antioxidant and immune activity.
Melatonin, 2 - 6 mg at bedtime as needed, for immune support and sleep.

You might also call your Dr.'s office to get more info on more diet ideas or ask for a referral to a dietician who can give you a more comprehensive guide and diet to follow.

Here's a good link for more info:

http://www.umm.edu/altmed/articles/sarco...

i imagine you'd have to avoid sunlight and dairy products