How Vitamin D Overdose Can Lead to Kidney Damage: 6 Symptoms to Watch Out For

Excessive Vitamin D supplementation can lead to hypercalcemia, straining the kidneys and causing nephrocalcinosis, potentially resulting in acute kidney injury or failure. Early symptoms like nausea, thirst, and frequent urination signal critical electrolyte imbalances. Careful use under medical supervision and regular monitoring are crucial to prevent overdose and protect kidney health. Vitamin D is crucial for bone health and immune function by helping the body effectively absorb calcium. However, the recent surge in supplement use has amplified the risk of overdosing (hypervitaminosis D), often occurring when people take high doses without medical oversight. The primary danger lies in the resulting hypercalcaemia, excessive calcium in the blood. The kidneys are forced to filter this overload, causing calcium to deposit in their tissues, a condition known as nephrocalcinosis. This prolonged strain can severely damage the filtering units, leading to acute kidney injury or irreversible failure. Recognising the subtle warning signs is vital, as early symptoms like nausea, persistent thirst, and frequent urination signal a critical electrolyte imbalance and escalating risk to renal function.