As shown in Figure 9A,B, from 1 h of dosing at 50–200 mg/kg body weight, PMYGGGMV and PMYGGGMV–ferrous chelate apparently lowered the diastolic and systolic blood pressures of spontaneous hypertension rats (p < 0.05), predominately due to their considerable ACE inhibitory activity (Table 1 and Figure 3) and relatively good gastrointestinal stability (Figure 8) [9]. Here, ACE is linked to Hypertension.