Normal Values of Oxidative Stress, Taurine, and Related Markers

Inclusion Criteria: * Age: Over 8 years old and less than 50 years Exclusion Criteria: * Pregnancy: Females who are pregnant or lactating will be excluded from the study as the influence of pregnancy on the markers is not known nor is the impact of pregnancy on taurine known. * Antioxidant use: Individuals taking taurine, over the counter energy drinks containing taurine or other high dose antioxidants such as Vitamin C or E, coenzyme Q, carotenes, selenium will be excluded as such intake will likely impact laboratory results. * Inflammatory status: * Individuals who have a significant chronic illness or state that has a known or suspected marked inflammatory component or oxidative stress component will be excluded from the study as the illness will impact inflammatory markers. * Patients with an acute illness, which may impact inflammatory biomarkers, will be postponed for study entry until the acute illness is resolved. Entry into the study at a later day will be offered. The study visit will not be conducted within 3 weeks of the acute illness. * Smoking within the past 12 months will be excluded.