Wow that is a lot. 4,000 I.U. is the upper limit according to NIH — https://ods.od.nih.gov/factsheets/VitaminD-Consumer/#:~:text=The%20daily%20upper,vitamin%20D

Wow that is a lot. 4,000 I.U. is the upper limit according to NIH — https://ods.od.nih.gov/factsheets/VitaminD-Consumer/#:~:text=The%20daily%20upper,vitamin%20D%20deficiency. https://ods.od.nih.gov/factsheets/VitaminD-Consumer/#:~:text...