Well-Retained; The Vitamin C metabolites in Ester-C positively impact retention of Vitamin C in cells; This complex yields beneficial antioxidant and immune system support; Includes natural bioflavonoids, acerola berry, and rose hips fruit powder Patented Formula; Special Manufacturing process creates a unique calcium ascorbate metabolite complex; Non-acidic, pH neutral Vitamin C for sensitive stomachs; Easy to digest, highly-absorbable Immune Support And More; Solgar Ester-C Plus 1000 mg Vitamin C Tablets also contribute to collagen formation for healthy skin and cartilage; Increases iron absorption