Ester-C Plus is exclusively formulated by Solgar and provides a patented method of supplementing pH neutral (non-acidic) vitamin C that is gentle on the stomach. The Vitamin C metabolites in Ester-C positively impact the uptake and retention of Vitamin C in cells, providing additional benefits. A special manufacturing process is employed to form a unique calcium ascorbate metabolite complex. This highly absorbable complex further incorporates natural bioflavonoids and acerola berry along with rose hips fruit powder yielding beneficial antioxidant protection and active immune system support.