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a by-product of the milling industry used as a protein supplement in diets for ruminants and pigs. A finer grade of offal than bran and it approximates pollard or shorts. The nomenclature is poorly defined.

Patient discussion about middlings

Q. How can I avoid waking up in the middle of the night to go to the bathroom? I wake up e-v-e-r-y night, in the middle of the night. At least once.

A. Was that always like this? Did it start in the recent time? How old are you?
You see, waking up in the middle of the night for urination is sometime a symptom. Could be something is pressuring your bladder, like women when they are pregnant- they go every 10 minutes.
Here is a symptom search about urinating often:

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