Pete wrote:

As a tomato lover and grower and arthritis sufferer, I would be interested
to learn of your source for the conflict between toms and arthritis.

The nightshade family contains the alkaloid solanin; it's thought that
arthritis sufferers can't process this into something harmless, so it
winds up irritating the already-inflamed joints.

As a result, missing out tomatoes and sweet peppers is a good idea, as
is taking cod liver oil, which produces natural prostaglandin
anti-inflammatories.