Effect of daily mixed nutritional supplementation on immune indices in soldiers undertaking an 8-week arduous training programme

The aim was to investigate the influence of a daily mixed nutritional supplement during an 8-week arduous training programme on immune indices and mediators including circulating leucocyte counts; bacterially stimulated neutrophil degranulation; interleukin-6 (IL-6), cortisol and saliva secretory immunoglobulin-A (SIgA). Thirty men (mean (SD): age 25 (3) years; body mass, 80.9 (7.7) kg) received a habitual diet (CON, n = 15) or received a habitual diet plus an additional food supplement (SUP, n = 15). From weeks 0–6, CON received 14.0 MJ day −1 and SUP received 19.7 MJ day −1 , and during a final 2-week field exercise in weeks 7 and 8, CON received 17.7 MJ day −1 and SUP received 21.3 MJ day −1 . Blood and saliva were taken at rest after an overnight fast at weeks 0, 6 and 8. Body mass loss over the 8 weeks was greater in CON (CON, 5.0 (2.3); SUP, 1.6 (1.5) kg: P