Abstract
To prospectively examine the long-term safety of a cardiovascular health dietary supplement by assessing a comprehensive set of safety measures. Single-arm, open-label study. National University of Natural Medicine, Portland, OR. Thirty adults with screening blood pressure readings consistent with prehypertension or stage I hypertension. One caplet per day of a dietary supplement for 6 months. The investigated herbal-mineral supplement contains several ingredients, most notably Rauwolfia serpentina. Primary measures included b-type natriuretic peptide (NT-proBNP), aspartate aminotransferase (AST), alanine aminotransferase (ALT), estimated glomerular filtration rate (eGFR), electrolytes, and the Patient Health Questionnaire (PHQ-9). Exploratory measures included physical vital signs, cholesterol levels, high-sensitivity cardiac troponin-I, cystatin C, endothelin, interleukin (IL)-6, IL-17a, tumor necrosis factor-α, high-sensitivity C-reactive protein, blood counts, and the Patient Reported Outcome Measure Information System (PROMIS) Sleep Disturbance Short Form 8b. NT-proBNP, AST, ALT, eGFR, sodium, calcium, magnesium, PHQ-9 score, and the majority of exploratory measures did not change. However, serum potassium increased (p < 0...Continue Reading
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