that can trash your kidneys over time...
Actually you are incorrect, my blood work cam back pretty stable the last few years ~45ng. Some quick research will show that toxicity can happen in the 150K and up range. Some regiments that doctors have put people one have people on MUCH higher like 700K. Either way, 5-10K IU per day has shown to be safe, because it's well bellow known ranges where people show toxicity. People also need to remember it's fat soluble.