Vitamin D3 supplementation is typically safe but should be used cautiously to avoid excessive intake, which can lead to hypercalcemia (high calcium levels in the blood). Hypercalcemia can cause kidney stones, calcification of tissues, and kidney damage. Individuals with hyperparathyroidism, sarcoidosis, or kidney disease should be particularly cautious. Vitamin D3 can also interact with certain medications, including steroids and anticonvulsants.
Keep out of reach of children and do not consume if pregnant or breastfeeding.
Food supplements should not be used as a substitute to a healthy diet and lifestyle.