Increased immunity with a lemon of bioflavonoids and vitamin C. A less acidic formula is Vitamin C with a lemon of bioflavonoids. NAT C contains 1000 mg of vitamin C and a combination of lemon bioflavonoids, hesperidin and rutin. In addition, it contains dogrose and acerola, which are natural sources of vitamin C. Bioflavonoids in combination with vitamin C contribute to an increase in the absorption of vitamin C in our body ...