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Graphs to values for placebo (low nitrate) and intervention (high nitrate) groups at sea level (day 0) and days 1, 3 & 5 at 4559 m altitude. All values showed significant increases in response to treatment with dietary nitrate. A: Salivary nitrate over time, B: Salivary nitrite over time, C: Salivary RxNO over time.
