The normal range of angiotensin I is 11~88ng/L. Abnormal values suggest that there may be primary hypertension, secondary aldosteronism and other diseases. Angiotensin Ⅰ can reflect renin activity, and its reference range is 11~88ng/L. Decreased angiotensin I values may be associated with a high sodium diet, or may indicate the presence of primary hypertension, idiopathic or pseudoaldosteronism, or adrenal cancer. Elevated values may be associated with a low sodium diet, luteal phase of the menstrual cycle, pregnancy, etc. They may also indicate the presence of secondary aldosteronism, pheochromocytoma, renal hemangioma, renal hypoplasia, nephritis, or congestive failure. If you experience any discomfort, it is recommended that you consult a physician and follow the doctor’s instructions for treatment.