Have you ever wondered why people take zinc lozenges at the first sign of a cold? Evidence suggests that zinc supplementation within 24 hours of symptom onset may shorten the duration of colds. Oral supplementation with zinc lozenges, capsules, or syrup is preferable to intranasal zinc, which has been linked to loss of the sense of smell in some individuals. Another function of zinc is the regulation of metabolism. Found in more than 300 enzymes, zinc is critical to digestion, including the absorption and metabolism of essential micronutrients. Zinc deficiency can lead to malnutrition, a major problem worldwide. Adequate zinc intake is especially important for children of all ages and for those who are pregnant or lactating. Deficiency of zinc during formative times could lead to retarded growth of biological systems like the gastrointestinal tract, skeletal, immune, and reproductive systems. Unlike iron, which is contained inside cellular components in your body, zinc permeates cells and tissues, performing critical structural, catalytic, and regulatory functions. This is why getting adequate zinc intake through your diet or supplementation is so important. Safeguarding against zinc deficiency means maintaining a varied diet rich in zinc-rich foods. Proteins like pasture-raised beef and poultry, and sustainably harvested, wild-caught fish and oysters are all good sources of this essential mineral. Vegetarian sources include organic cereals, beans, nuts, oats, and tofu. While adults and seniors have the same average physiologic requirements for zinc, absorption can decrease as you age. High-quality, bioavailable supplements can help ensure you meet your body's unique needs, especially during periods of increased stress or poor eating.