So I was just looking in my fridge and noticed a bottle S-4. It's gotta be ~3 yrs since I bought this from AR-R. This whole time I thought it was some unopen keto that I never used. (now I'm wondering what happened to the Keto) Anyway....I have 2 questions.
1. Is it still good? It seems to have crashed....can I just shake it up?
2. (Most importantly) What the Hell is it??? I must have purchased it for a reason, but for the life of me I can't remember what it is.
Ar-r doesn't sell it anymore and I typed S-4 in the search bar and it didn't bring up anything.
Thanks Guys