BfR warns about excess vitamin D for infants

In July 2026, a case of severe vitamin D poisoning was reported in an infant in Germany.

It was caused by the administration of a high-dose supplement intended for adults and purchased online, which was used instead of the recommended paediatric preparations. A similar case had already been reported in late 2021.

As infants are at risk of vitamin D deficiency, the daily administration of 400–500 IU (10–12.5 μg) is recommended in Germany during the first 18 months of life to prevent rickets.

Excessive vitamin D intake can cause hypervitaminosis D, characterised by hypercalcaemia, loss of appetite, vomiting, drowsiness, muscle weakness, weight loss, dehydration and electrolyte imbalances. Prolonged excessive intake may lead to kidney stones, nephrocalcinosis and an irreversible decline in renal function. It is therefore recommended to check whether the product is suitable for infants, follow the manufacturer’s instructions, and avoid concentrated liquid preparations or products intended for weekly or monthly administration.

For adolescents and adults, a daily dose of up to 20 μg (800 IU) is considered safe.

See more here: https://www.bfr.bund.de/en/notification/vitamin-d-poisoning-in-infants/