TABLE 1.

Experimental groups

Group	n	Injection	Treatment
Control	6	Saline solution	corn oil
STZ	6	STZ	corn oil
STZ‐TA	6	STZ	TA (80 mg/kg) dissolved in corn oil
STZ‐F200	6	STZ	Fennel (200 mg/kg) dissolved in corn oil
STZ‐F400	6	STZ	Fennel (400 mg/kg) dissolved in corn oil
STZ‐Met	6	STZ	Metformin (300 mg/kg) + corn oil