"(Mark Kurlansky, 1997) Supplement that some claim eases arthritis (Upton Sinclair, 1927)" crossword clue

Let me guess, you have been playing a crossword game and got stuck on the clue "(Mark Kurlansky, 1997) Supplement that some claim eases arthritis (Upton Sinclair, 1927)". Well, you have come to the right place to find the answer to this clue.

C O D L I V E R O I L