A micronutrient composition is highly effective in controlling high blood pressure while given to mammal for treating with or without prescribed pharmaceutical drug. The micronutrient composition comprises of vitamin C, vitamin D3, vitamin B1, vitamin B2, vitamin B3, vitamin B6, vitamin B9 and vitamin B12 and calcium and magnesium, clove extract, grape extract, celery extract and L-arginine. This micronutrient composition supports critical cellular mechanisms involved in the relaxation of vascular smooth muscle cells important in maintaining healthy blood pressure. The combined effects of the micronutrients contained in the micronutrient composition include increased production of NO “relaxing factor” and decreased activity of Angiotensin converting enzyme 1 (ACE1). ACE1 inhibitory effect of this natural formula was more pronounced than obtained with the pharmaceutical ACE1 inhibitor—Lisinopril—the commonly prescribed high blood pressure medication.