Low A/G ratio means low albumin and globulin ratio. Usually in liver disorders, dietary deficiency of albumin, increased excretion of albumin in kidney disorders can alter this ratio. Read the details;
The low B/C ratio is not commonly done. The low B/C ratio can be blood urea nitrogen and creatinine ratio, which is sometimes done for assessment for the bleeding.
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The C-peptide and CO2 problems can be because of the anemia, recurrent infections and metabolic phenomenon. Your physician should investigate for the reasons for the low immunity. Another possibility to rule out is absorption defects, which may be preventing the absorption of iron and proteins, and causing anemia, and low albumin. On the basis of this all your clinical features can be explained.