A Compositional Analysis of a Common Acetic Acid Solution With Practical Implications for Ingestion

OBJECTIVE: Acetic acid solutions, such as pickle juice (PJ), have gained anecdotal popularity among certified athletic trainers and other sports medicine professionals as remedies for exercise-associated muscle cramps. The aims of this study were 2-fold: (1) to report compositional analyses of 2 common types of PJ and (2) to discuss implications for ingestion following current National Athletic Trainers' Association (NATA) fluid-replacement guidelines. DESIGN AND SETTING: Biochemical laboratory analyses of 2 PJ sample types. MEASUREMENTS: Compositional analyses were performed in triplicate and compared with a 1-way analysis of variance. RESULTS: Mean values for PJ with 220 mg of sodium per serving were carbohydrate, 4 +/- 0.2%; osmolality, 713 +/- 6 mOsm.kg H(2)O(-1); pH, 3.8 +/- 0.2; calcium, 0.5 +/- 0.02 g/L; potassium, 1.4 +/- 0.02 g/L; magnesium, 0.1 +/- 0.01 g/L; and sodium, 7.4 +/- 0.1 g/L. Mean values for PJ with 390 mg of sodium per serving were carbohydrate, 3 +/- 0.1%; osmolality, 1446 +/- 9 mOsm.kg H(2)O(-1); pH, 3.5 +/- 0.1 g/L; calcium, 0.1 +/- 0.01 g/L; potassium, 1.2 +/- 0.02 g/L; magnesium, 0.1 +/- 0.01 g/L; and sodium, 17.1 +/- 0.1 g/L. Differences between the 220 and 390 PJ were significant (P <.05) for osmolality, calcium, and sodium. CONCLUSIONS: Both types of PJ exceeded sodium concentration levels set by the current NATA guidelines for fluid replacement. Hypothetical dilution references are presented to assist the athletic trainer with fluid volumes necessary to dilute PJ. Ingestion of PJ or other hypertonic fluids should be followed by ingestion of hypotonic or isotonic fluids to ensure that ingested amounts of sodium fall within the current NATA guidelines. Volumes for proper dilution may be substantial.