hi. my family doctor told me to take 1000 ui vitamin d per day in addition to the amount in my multivitamin but I take 4000 ui of vitamin d plus my multivitamin usually. is that ok or am I taking too much? here in canada doctors no longer check vitamin d levels since the canadian government no longer covers the fee for vitamin d testing and my doctor never checkedy vitamin d levels because of this. the canadian law says that everybody has to take 1000 ui of vitamin d per day, they came up with that law when they stopped covering the fee for vitamin d testing.