A study, entitled "ACE Inhibitor Activity of Nutritive Plants in Kwa-Zulu Natal", was conducted by Irene Mackraj and S. Ramesar, both of the Department of Physiology and Physiological Chemistry; and H. Baijnath, Department of Biological and Conservation Sciences; University of Kwa-Zulu Natal, Durban, South Africa to examine the effectiveness of 16 plants growing in Africa's KwaZulu-Natal region, concluding that eight plant extracts may hold value for treating high blood pressure (hypertension).