[Vecr]

No, 5000 IU per day is generally considered the highest non megadose. Make sure it is good quality (D3, USP in the US), and it should be fine. Some people say also to take K2 (also make sure it's USP in the US), but I'm not sure the exact supposed mechanism of protection from adverse effects from D3. Something about preventing calcium from leaching from the bones and accumulating in the blood, I think.

[pmoriarty]

"Vitamin D controls the absorption of calcium into the blood. Vitamin K2 controls where that calcium ends up.

"Over-supplementation of vitamin D3 without ample vitamin K2 leads to problems of excess calcium.

"If calcium isn’t laid into bone, it will find itself in other tissues, like your arteries. Calcium in the arteries is BAD. It contributes to atherosclerosis and vessel stiffness."

https://dralexrinehart.com/articles/the-vitamin-d-and-vitami...