Hepatic and renal effects of oral stingless bee honey in a streptozotocin-induced diabetic rat model

Figure 5 Periodic acid–Schiff staining of liver tissue sample on the 13^th day of study. A: Tissue sample for the non-diabetic (ND) control group; B: Untreated diabetic (UNT) group; C: Stingless bee honey (SBH) treatment group; D: Stingless bee honey plus metformin (SBME) treatment group; E: Metformin treatment (MET) group. The ND control group showed normal architecture. The UNT group showed an increase in glycogen content. The SBH diabetic group showed a reduction in glycogen content. The MET group showed an increase in glycogen content. The SBME group showed a reduction in glycogen content (PAS staining, 40 ×). CV: Central vein; GC: Glycogen content showed an increase in glycogen content.