You can take too much vitamin d, and 5,000iu of D3 is more than enough unless you have chronically low vitamin d blood levels. I've tested chronically very low for a long time and I've been told to only take 10,000iu a day. Vitamin d is fat soluble, which means it could continue to collect in your body over time if you're taking too much. It's not like most vitamins that are eventually peed out of your body. Too much D3 supplements over time can be a bad thing. I don't remember exactly what the bad result is, but it's something serious enough to be careful with taking excessive doses of D3. 2,000iu is often enough when you're supplementing the sunlight you get. Maybe 5,000 iu through the winter if you're not outside much during the day.
You can take too much vitamin d, and 5,000iu of D3 is more than enough unless you have chronically low vitamin d blood levels. I've tested chronically very low for a long time and I've been told to only take 10,000iu a day. Vitamin d is fat soluble, which means it could continue to collect in your body over time if you're taking too much. It's not like most vitamins that are eventually peed out of your body. Too much D3 supplements over time can be a bad thing. I don't remember exactly what the bad result is, but it's something serious enough to be careful with taking excessive doses of D3. 2,000iu is often enough when you're supplementing the sunlight you get. Maybe 5,000 iu through the winter if you're not outside much during the day.