The message
from Janet Baraclough contains these words:

After the end of July, rhubarb develops a high acid content so isn't
recommended eating then, for babies or anyone with kidney problems, gout
or arthritis.

Or rheumatism.

--
Rusty Hinge
horrid·squeak&zetnet·co·uk
http://www.users.zetnet.co.uk/hi-fi/tqt.htm