An 89-year-old retired businessman died from an “overdose” of Vitamin D supplements that did not warn about the risks of excessive intake.
David Mitchener from Oxted, Surrey, reportedly had fatally high levels of Vitamin D when he was brought to the East Surrey Hospital last year in May and was suffering from hypercalcaemia – a build-up of calcium in the body associated with taking too much vitamin D.
He died ten days later.
Really depends on where you live. Just read a study by a university at my latitude where we get as little as 10 hrs a day of sun in the dead of winter. Even taking 1000IU's per day, healthy adults were losing vitamin D all winter, and some were falling into low levels by spring when levels naturally rebound. 2000IU's kept levels steady all winter. It's not like it's expensive either, I just bought a bottle for 10 bucks that will last me almost two years.
There definitely needs to be better regulations and clearer packaging on all vitamins and supplements though