Comment by sebow

Some might not like this answer but the best course of action is still some sun exposure. As for the actual answer, someone correct me if I'm wrong but there there are multiple 'variants' of vit. D and the vast majority of "vit D" supplements most likely don't include the complete formula (which is arguably the best way in order to also assimilate it "fully"). The daily recommended dose is fine unless you're deficient.