The benefits of Solgar Ester-C Immune Complex: Solgar Ester-C Immune Complex provides a combination of Ester-C, Vitamin D3, Vitamin A, Zinc, Biotin and botanical extracts designed to enhance the function of the immune system. Ester-C offers a gentler, more easily digested form of vitamin C which is pH neutral and non-acidic. The metabolites of Ester-C have a positive effect on the levels of vitamin C retention in the body’s immune cells, giving you superior immune support. Vitamin D is a fat-soluble vitamin that is required to promote calcium absorption, which helps to maintain healthy bones and teeth. Obtained from the sunlight or vitamin D rich foods - over a billion people worldwide have very low levels of vitamin D. In addition to changing your diet and lifestyle, taking a vitamin D supplement is a good way to top up, especially in winter months. Zinc promotes healthy skin, hair and nails and exerts antioxidant activity, which helps fight free radicals. Free radicals are unstable molecules that can damage the cells in your body and are associated with premature aging and certain health issues. Zinc also contributes to a healthy immune system and has properties that are useful for energy support, fertility and male health. Vitamin A is a fat-soluble vitamin which can be found in two forms; retinol and beta carotene. Retinol can be found in foods from an animal source, with the other type of Vitamin A being derived from colourful fruits and vegetables. Retinol can be used directly by the body, whereas beta carotene needs to be converted into retinol first before it can be used. Biotin is a water-soluble B-vitamin. It helps to promote healthy skin, nails and hair, and is necessary for certain enzymes to work properly. Biotin also supports energy production in the body, and is required for protein, carbohydrate, and fat metabolism. All Solgar products meet our industry recognized “Gold Standard” for excellence. Made using naturally sourced ingredients and innovating since 1947, Solgar is your perfect supplement to good health - 98% of Solgar consumers recommend the brand