Vitalynk defenses is a food supplement that contains zinc and selenium, which contribute to the normal functioning of the immune system. Each Vitalink Defenses capsule contains 4 tablets: Gastro-resistant tablet 1 (orange): Contains vitamin D that contributes to the normal functioning of the immune system. Immediate release tablets 2 and 3 (yellow): Contain Echinan 4P, extract of narrow-leaf echinacea, the most difficult to grow and historically most valuable. Echinan 4P is traditionally known for its immune-friendly properties. Sustained release tablet 4 (brown): Contains zinc and selenium, which contribute to the normal functioning of the immune system and protect cells against oxidative damage. It is recommended to take 1 capsule a day in the morning with breakfast. Like any other food supplement, if you are taking any type of medication or following a controlled diet, consult your doctor about the convenience of taking this product. Do not exceed the expressly recommended daily dose. Food supplements should not be used as substitutes for a varied, balanced diet and a healthy lifestyle. Keep out of the reach of little kids. Do not use the product after the expiration date indicated on the box. Store in a cool, dry place protected from direct sunlight or other heat sources.