Exploring the Effect of Inorganic Nitrates on the Human Microvascular Physiology - a Pilot Study.

"Drink consumption was followed by regular BP measurements and collection of saliva samples every 30 minutes for four hours. Microcirculatory measurements were then repeated and saliva and urine samples were collected again.~After the last measurement subjects were provided with a standardized meal with a very low nitrate intake to eat within 30minutes. Participant then left the research centre and they were asked to collect a saliva sample after two hours from the completion of the meal. This was immediately followed a dose of labelled nitrate (4mg in 100ml of distilled water) to drink within one minute. Subjects were then asked to collect six additional saliva samples until the next morning (four before going to bed and two in the morning), accompanied by measurements of resting BP.~Cross-over assessments were then repeated in the same order at Visit 3, followed a wash-out period of at least one week before entering the second arm of the study."