What should I use: 'composed of' or 'composed from'?
We almost always use composed of, and not composed from:
We refer to something's makeup (composed, made up) with the preposition of, which has a standard meaning that includes composition. Of is even used all by itself to mean composed of: "a ring of silver and gold".
Usual collocation is "of". It may read "consist of" E.g:
Water is composed of hydrogen and oxygen.
Please check compose.