SPECIAL FORMULA: Exclusively formulated by Solgar, Ester-C Plus provides a patented pH neutral (non-acidic) Ester-C Vitamin C that is gentle on the stomach. A special manufacturing process is employed to form a unique calcium ascorbate metabolite complex. BENEFITS: The Vitamin C metabolites in Ester-C have a positive impact on the retention of Vitamin C in the bodyâ€s cells, which provides additional benefits. POSITIVE RETENTION: The unique calcium ascorbate metabolite complex is well retained by the body and yields beneficial antioxidant and immune system support and incorporates natural bioflavonoids and acerola berry along with rose hips fruit powder. SUITABLE FOR VEGANS: Non-GMO and certified gluten free. They are also free of wheat, dairy, soy, yeast, sugar, sodium, artificial flavors, sweeteners, preservatives and colors.