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.
It will not raise your D3 level or change the 25ohd level. Most doctors still do not know that they should give D3 and not D2. So 50,000iu once a week translates to 7000 iu of D3 a day. It is much better to take it on a daily basis rather than weekly if possible. (You can get D3 capsules that have 50,000 iu.).