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Although rare, vitamin D toxicity can also lead to a buildup of calcium, or hypercalcemia.—Sherri Gordon, Health, 28 Oct. 2025 For example, hypercalcemia (high calcium levels in the blood) can cause symptoms like weak muscles, fatigue, confusion, and bone pain.6
General signs of an electrolyte imbalance can include:7
Dizziness
Muscle cramping
Irregular heartbeat
Confusion
4.—Karen Berger, Verywell Health, 1 Oct. 2025
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