Im not sure, look up the vitamins in a cucumber, they have a lot of water too which coukd be part of it. I wish I craved cucumbers instead of everything sweet! Its healthy at least.
Never thought of that its comes up with a bunch of vitamins. I really dont know which one would do that to be though. this is what i got:
Cucumbers contain most of the vitamins you need every day, just one cucumber contains Vitamin B1, Vitamin B2, Vitamin B3, Vitamin B5, Vitamin B6, Folic Acid, Vitamin C, Calcium, Iron, Magnesium
All those ate super imporyant, maybe its your bodies way of getting a natural prenatal vitamin.