Nutrition contributes directly to human health, and health directly contributes to the effectiveness of military personnel. Lack of proper nutrition can decrease the effectiveness of vaccines and increase the possibility of disease, especially in high stress situations. Many nutrients have direct effects on the immune system. When the body is subjected to illnesses such as injuries or burns increased amounts of the amino acid Glutamine are required. Vitamins C and E are antioxidants and have been associated with increased immune response. Nutrition plays an important role in the body's ability to repair itself. Throughout history there have been instances where disease caused by nutritional depletion caused more deaths than combat. During Lord Anson’s 1774 voyage around the world 636 of his 961 soldiers died while on his ships. The surgeon James Lind of the Royal Navy discovered that consuming citrus fruits prevented scurvy. Historical accounts and nutrient analysis provide evidence that poor nutrition and inadequate amounts of vitamins A, C, and E may have caused the failure of the New Zealand army during the Battle of Gallipoli. These deficiencies account for numerous cases of scurvy and illnesses and could have been easily avoided by incorporating canned fruits and vegetables into soldier’s diets. “ Inadequate nutrition can result in poor physical and cognitive performance (e.g. inability to carry out physical tasks, poor concentration and decreased vigilance) [21,22]. The long-term effects of both macro- and micro-nutrient imbalances include increased risk of vitamin and mineral deficiencies (potentially predisposing some individuals to an increased risk of stress fractures and rickets), obesity, hypertension, coronary heart disease, diabetes, osteoporosis and kidney failure”.