Arthritis in one foot (ETA Yes it has been diagnosed)

[Jdsk]

Mackerel,Cod liver oil and nuts for good oils to lubricate the joints.

Foodstuffs are broken down before being absorbed from the gut.
Synovial fluid is the wet stuff surrounding joints; secreted by the synovial membrane, if memory serves.

There is some interesting evidence around effects of oily foods on arthritis. Probably different for marine and vegetable oils. And possibly different for rheumatoid arthritis from other types.

(I don't think that it's mediated by the intact oils lubricating the joint.)

Jonathan