The problem isn’t about reaching target levels. High singular dose of Vitamin D taken at once could have some negative effects. Some formulations are administe

The problem isn’t about reaching target levels. High singular dose of Vitamin D taken at once could have some negative effects. Some formulations are administered with Vitamin K to try to offset this risk but it’s better to just spread the dosages out rather than expose your body to unnaturally high spikes of Vitamin D.