More About:
| Nutrient | Dose | Reason |
| Calcium | 1,000 mg/day | Supports healthy defenses by transmitting messages through nerves and cells and by activating enzyme reactions. |
| Magnesium | 400 mg/day | Enhances innate and acquired immune responses. |
| Vitamin C | 1,000 mg/day (during cold and flu season) | In clinical research, people who took 1,000 mg of vitamin C daily experienced fewer colds than those taking a placebo. However, the increased virus-fighting action ceased after two weeks. |
| Vitamin E | 200 IU/day | Protects white blood cells, the body’s critical immune defenders, from free radical damage. |
| Zinc | 12 mg/day | Contributes an essential cofactor to more than 100 enzymatic reactions in the body, including many protective functions. |
| —A.L. | ||
| Source: Understanding Normal and Clinical Nutrition by Eleanor Noss Whitney, et al. (West Publishing Company, 1998). | ||