Overdosing on D
Most people take a D supplement without any issues, simply by following the dosage recommended by their doctor, the RDA (recommended daily allowance) or the vitamin manufacturer. But taking a high dose for a long period of time can lead to toxicity.
Vitamin D is fat soluble. Unlike water soluble supplements, your body cannot eliminate what is no longer needed, and dangerous levels can accumulate quickly. After a large, longtime intake of D, your liver starts to produce a chemical called 25(OH)D. High levels of this compound cause high levels of calcium to develop in your blood, a condition known as hypercalcemia.
Specific and nonspecific symptoms of hypercalcemia include:
• Poor appetite
• Marked thirst and dehydration
• Passing urine often
• Constipation or diarrhea
• Stomach pain
• Confusion
• Muscle pain or weakness