Helping to neutralize free radicals, Ester-C also aids in the nutritional absorption of iron and works with other nutrients to promote overall health. Along with essential vitamins, such as B-6 and B-12 to support energy metabolism and vital electrolytes to aid in metabolic hydration. Product Benefits. It supports circulation, is beneficial to joints and connective tissues, helps fight the premature aging of cells, and forms the basis for healthy skin.