Inorganic Nitrate Supplementation in Chronic Hypertensive Pregnancies

Inclusion Criteria: * Pregnant women diagnosed with chronic hypertension (systolic blood pressure above 140 mmHg and/or diastolic blood pressure above 90 mmHg before pregnancy or before 20 weeks of gestation) as defined by the Brazilian Network for Studies on Hypertension in Pregnancy (RBEHG, Brazilian acronym) Protocol and Chronic Hypertension/Preeclampsia by the Brazilian Federation of Gynecology and Obstetrics Associations (FEBRASGO, Brazilian acronym) Protocol. * Patients on monotherapy with methyldopa as treatment at the time of inclusion. * Women with less than 16 weeks of gestation confirmed by first-trimester ultrasonography confirming gestational age. Exclusion Criteria: * Multiple pregnancies, age below 18 years old, inability to provide informed consent, or history of low adherence to medication therapy. * Patients with uncontrolled chronic hypertension, with blood pressure values above 160x110mmHg. * History of food allergies, especially hypersensitivity to beetroot. * Users of illicit drugs, smokers, or alcohol abusers. * Diagnosis of coronary artery disease, congestive heart failure (moderate to severe), moderate to severe liver failure, chronic renal insufficiency (with plasma creatinine clearance less than 30 ml/min/1.73 m² of body surface), pre-existing type 1 diabetes, and type 2 diabetes. * Pregnant women who frequently used non-steroidal anti-inflammatory drugs, nasal decongestants, and anorectics before getting pregnant; users of proton pump inhibitors and H2 receptor antagonists or any other medication that interferes with stomach pH, starting 2 weeks before the beginning and continuing throughout the remainder of the study.