Also, I support the above answer: porridge is actually a carbohydrate, and drinking porridge is actually equivalent to "washing the intestines" and clearing the stomach, and it has no nutrition in itself. Moreover, people with diabetes or high blood sugar are not suitable for drinking porridge, because porridge is most easily converted into blood sugar.
Eating porridge for the elderly is actually bad for the stomach. But these have to be based on the situation of the parties.