[gojomo]

While any level someone might usually consider supplementing (such as 2000-10000IU daily) should be safe, Vitamin D toxicity is a real thing at higher levels of intake. See: https://www.healthline.com/nutrition/how-much-vitamin-d-is-t...

[Jarwain]

According to the comment thread involving devaboone Vitamin D toxicity isn't inherently due to the Vitamin D, but the impact that it has on blood calcium levels.