Causes of Vitamin D Toxicity
The primary culprits of vitamin D toxicity include excessive intake of prescription vitamin D or over-the-counter supplements. Regular blood tests are advised for those supplementing vitamin D to monitor levels and prevent toxicity. Unlike supplements, dietary sources and sunlight exposure rarely cause toxicity.
Symptoms and Signs of Vitamin D Toxicity
Elevated Blood Levels
Vitamin D blood levels exceeding 100 ng/mL indicate excess, with levels above 150 ng/mL signifying intoxication. Optimal levels are debated, though 30–60 ng/mL may offer illness protection. Cases often stem from supplement misuse or prescription errors, highlighting the importance of medical guidance in supplementation.
Excessive dosages, such as daily intakes significantly above the 4,000 IU limit, can lead to dangerous blood levels, evidenced by reports of individuals experiencing toxicity after prolonged high intake. Professional consultation ensures safe dosing, mitigating the risk of reaching harmful levels.
