Highly absorbable, nonacidic vitamin c bioflavonoid complex. Esterc plus is exclusively formulated for solgar and provides a patented method of supplementing ph neutral nonacidic vitamin c to prevent digestive irritation.vitamin c is an antioxidant vitamin essential to the bodys health and is especially important for maintaining healthy skin. Also known as ascorbic acid, vitamin c is a watersoluble vitamin.unlike most other animals, humans cannot make their own vitamin c. With vitamin c playing a role in being part of more than 300 bodily functions, life itself depends on daily replenishment. Its primary function is to maintain collagen, a protein necessary for the formation of skin, ligaments, bones and teeth, and for the strength of blood vessel walls. In addition, vitamin c plays an important part in the absorption of iron, which is necessary for the formation of red blood cells. It also plays a role in the utilisation of folic acid, one of the bcomplex vitamins.