Yes, because the powder is essentially composed of sugars and vitamins- two things that take very long periods of time to "go bad".As long as it is within a year of the expiration date, it should be fine.
well most foods are still good after their expiration date because usually the expiration date is the sell date, so yes it could still be good. also yes and no bacause the expiration date is not entirely accurate. if it is a year past its expiration date i advise you NOT to eat it!
Drugs aren't dangerous if taken after expiration date. A lot of prescription drugs have a really long shelf life even after the expiration date, but the effectiveness of the prescription will decrease as time goes by after the expiration date.
On every food label, there is an expiration date. To find an expiration date on a Boost product, you will need to find the words expires on, or some variation using the word expiration and then a date.