There is no expiration date for cashier's checks. If a cashier's check isn't cashed in a timely manner, considered six months by most banks, it can be considered void or invalid. Keep Learning.
How often might 50000 IU vitamin D be taken - results of clinical trials. There have been many extremely successful vitamin D intervention trials. The trials are listed in the following table are sorted by number of days between doses of 50,000 IU. It appears that the higher the dose of vitamin D the more diseases which are prevented or treated.
The most important factor is having your vitamin D serum level tested every six months, as people vary widely in their response to ultraviolet exposure or oral D3 supplementation. The test is called 25(OH)D, also called 25-hydroxyvitamin D, and you can have it done by virtually any physician.