Can blood tests show that a person hasn't eaten in days?
Yes, blood tests can show if a person is eating well or not
CBC, C-Reactive protein, LFT and KFT are the best blood test
You can take help from a qualified doctor who will help you describe each test at apollo
After blood is drawn it is kept in a bottle which has anticoagulant and processed in the lab to check for illnesses and deficiencies.