melenic or melanotic stools What Causes Black-Colored Stool? Black stool, melena, can result from: Dietary Factors: Foods like black licorice, blueberries, or iron supplements. GI Bleeding: Upper gastrointestinal bleeding (e.g., ulcers, gastritis, or esophageal varices) melanotic stools or melenic stool

Data Availability The datasets generated and analyzed during the current study are available in the BioStudies database ( under accession numbers S-HECA1, S-HECA5, S-HECA9, S-HECA18, S-HECA33, S-HECA34, S-HECA47, S-HECA139, S-HECA158, S-HECA361, S-HECA401, S-HECA403

The IVD and ACAD8 encoded proteins are involved in the catabolism of leucine and valine, respectively

In is not necessary to obtain blood samples for lipid profile testing in fasting conditions

Londero D, Greco PL

In summary, the reasons a GP surgery may refuse an early B12 injection are often rooted in a strict interpretation of established, but imperfect, guidelines, a misunderstanding of the actual science of B12 storage and metabolism, and a desire to maintain administrative consistency