| Effect | Decrease |
| Trial Design | Double blind |
| Trial Length | 6+ Months |
| Number of Subjects | 50 |
| Sex | Both Genders |
| Age Range | 45-64, 65+ |
| Body Types | Average |
Supplementation of 45mg elemental zinc for a period of 12 months in elderly persons who had low baseline zinc levels, the infection rate seen with supplementation (29%) was lower than placebo (88%) although upper respiratory tract infection rates trended to be less common (50% reduction) but this failed to reach significance.
