Excess of calcium intake leads to?
**Core Concept**
Excess calcium intake can lead to hypercalcemia, a condition characterized by elevated serum calcium levels. This can occur due to various factors, including excessive dietary intake, hyperparathyroidism, or vitamin D toxicity.
**Why the Correct Answer is Right**
Hypercalcemia can cause a range of symptoms, including nausea, vomiting, abdominal cramps, and constipation. The kidneys play a crucial role in regulating calcium levels by reabsorbing calcium from the filtrate back into the bloodstream. Excess calcium intake can overwhelm the kidneys' ability to reabsorb calcium, leading to hypercalcemia. Additionally, hypercalcemia can also lead to calcification of soft tissues, including the kidneys, which can further exacerbate the condition.
**Why Each Wrong Option is Incorrect**
* **Option A:** While excess calcium intake can lead to hypercalcemia, it is not directly related to hypokalemia (low potassium levels). Hypercalcemia can actually lead to hypokalemia due to the increased excretion of potassium in the urine.
* **Option B:** Excess calcium intake is not directly related to osteoporosis. In fact, calcium is essential for bone health, and adequate intake is necessary to prevent osteoporosis.
* **Option C:** Excess calcium intake is not directly related to hyperuricemia (high uric acid levels). While hypercalcemia can lead to kidney stones, it is not a direct cause of hyperuricemia.
**Clinical Pearl / High-Yield Fact**
It's essential to note that the upper limit for calcium intake is 2,000 mg/day for adults. Exceeding this limit can lead to hypercalcemia, which can have severe consequences, including kidney damage and cardiovascular disease.
**Correct Answer: D. Hypercalcemia**