Examine will soon include a little header to quickly denote if a compound is wholly water soluble or wholly fat soluble (or a mixture of the two). Until then, take the following to heart.
If studies emphasize an ethanol extract for a compound, it is fat soluble to a degree
If an ethanol extract is never used, it is most likely water soluble
If the compound is classified as 'highly polar' it is usually very water soluble, the opposite can also be true (highly non-polar == fat soluble)