What is Nature's Supreme Vitamin C + Zinc? It is a food supplement containing vitamin C and zinc in the form of water-soluble, effervescent tablets. This product uses Quali®-C, the world's first patented vitamin C brand. What are the main functions of Vitamin C and Zinc? - Vitamin C contributes to the normal function of the immune system. - Vitamin C contributes to normal energy-yielding metabolism. - Vitamin C contributes to the reduction of tiredness and fatigue. - Zinc contributes to the normal function of the immune system. - Zinc contributes to normal protein synthesis. Nature's Supreme Vitamin C + Zinc Features: - 1000 mg vitamin C in water-soluble effervescent tablet form - Patented Quali®-C raw material - Production in ISO 9001, 22000, GMP and halal certified facilities - Origin of the main product ingredients: United Kingdom What Does the Label on a Product Mean? The quality banderol you see indicates that this product has passed microbiological tests and analyses and that the declared content of the product has been verified. Nature's Supreme has its specified ingredients tested for quality and accuracy by independent laboratories holding TÜRKAK accreditation. These laboratories are among the leading centers for microbiological analysis in Europe. Analyses are conducted in these advanced laboratories. Nature's Supreme brand continues this practice in all its product options and has all the necessary analyses done. Ideal Storage Recommendation: There's a desiccant under the product's lid. Therefore, do not leave the lid open and close it tightly. Keep away from potentially humid environments such as the kitchen, bathroom, or refrigerator. Store in a cool, dry place.