Shelf life of old 1.2 and 1.3 formula

I have a few boxes of old soylent powder version 1.2 and 1.3 formula that’s been sitting in my closet for years as an emergency food supply. Just wondering if it’s still good or not.

“Good” as in not dangerous or tasty? Can’t speak to the former but as to the latter I once bought some 12-16mo expired 1.5 (years ago) and it did NOT taste good at all.

Personally I wouldn’t try it.