Hello! Thanks for putting your query in HCM. I am a Gastroenterologist (DM).
Presence of starch in stool suggest malabsorption syndrome
(MAS). Also serum protein is very less only 2gm, normal range is 6-8gm. In this patient it may be due to Celiac disease
, SIBO ( Small intestinal bacterial overgrowth syndrome), or may be due to dysbiosis
For confirmation of MAS your patient require endoscopy
examination and duodenal biopsy for histopathology
For celiac disease test for antiendomysial antibody for gluten allergy
For SIBO or dysbiosis: To confirm get Glucose hydrogen breath test
, or you can simply start tablet rifaximin and tab with combination of pre and probiotic
I hope I have answered your query and this will help you. If you have any further query I will be happy to answer that too. Remain in touch and get-well soon.