That is why you store it, so that you can use it later.
No-one suggested that a person should consume 2 billion IU, or about a million daily doses, by high dose standards. Sounds off to me, one would have to consume nothing but jars of vitamin D, all day long, and nothing else. duh.
Blah blah blah.
Vitamin D is also stored in your fat.
Your body has mechanisms to deal with vitamin D.
That is why you store it, so that you can use it later.
No-one suggested that a person should consume 2 billion IU, or about a million daily doses, by high dose standards. Sounds off to me, one would have to consume nothing but jars of vitamin D, all day long, and nothing else. duh.