According to findings in this 2017 study, dietary amino acids may increase your risk for hypertension (high blood pressure), but this study didn’t look at supplementation in particular.Teymoori, F., Asghari, G., Mirmiran, P., & Azizi, F. (2016). Dietary amino acids and incidence of hypertension: A principle component analysis approach. Scientific Reports, 7. That said, some amino acid supplements contain L-arginine, which can dangerously lower blood pressure.Abukhodair, A. W., Abukhudair, W., & Alqarni, M. S. (2021). The Effects of L-Arginine in Hypertensive Patients: A Literature Review. Cureus, 13(12). If you have high blood pressure or are predisposed to it, talk to your doctor before starting an amino acid supplement.