Calcium does not lack do not eat, if after a professional diagnosis of lack of, under the guidance of a professional doctor to eat, selling drugs doctors can not be trusted, some small clinics open do not eat, the most secure or dietary supplements.
Too much calcium intake may interfere with the absorption and utilization of other trace elements for the human body, and may also lead to an increased risk of kidney stone disease. In other words, nutrient intake is not the more the better, the lack of health is not good, and excessive may also be harmful to health.
Vitamin D is taken under the advice of a medical professional. Don't just take it privately. Doctors who sell drugs can not be trusted, some small clinics prescribed do not eat, the safest or sunshine. The human body has subcutaneous storage of 7-dehydrocholesterol generated from cholesterol, which can be converted into vitamin D3 after exposure to ultraviolet rays. appropriate sunbathing is sufficient to meet the human body's need for vitamin D.
The daily exposure of 30 centimeters of hands and feet in the sunshine for 30 minutes, effective prevention of vitamin D deficiency.
Vitamin D overdose performance: some scholars believe that long-term daily intake of 25 μg of vitamin D can cause poisoning, which may include some of the more sensitive to vitamin D people, but long-term daily intake of 125 μg of vitamin D will certainly cause poisoning. Symptoms of toxicity are abnormal thirst, inflammation of the eyes, itchy skin, anorexia, lethargy, vomiting, diarrhea, frequent urination, and abnormal calcium deposits in the walls of blood vessels, liver, lungs, kidneys, and stomach, joint pain, and diffuse bone demineralization. China has established a tolerable maximum intake of 20μg of vitamin D.
So it is not recommended to take it orally or by injection, and the safest thing to do is to sunbathe.