INS 300 is ascorbic acid, the same compound as Vitamin C. On packs it is used as an antioxidant: it stops fats and colours from going off and keeps cut fruit and juices from browning. It is generally vegan and is permitted by FSSAI for specified food categories.
INS 300 is ascorbic acid, the same compound as Vitamin C. On packs it is used as an antioxidant: it stops fats and colours from going off and keeps cut fruit and juices from browning.
Brands use it because a small amount preserves colour and freshness in juices, jams, and ready-to-eat foods, and it is also a vitamin so it doubles as a fortification claim on the label. It is one of the few additives that has nutritional value beyond its technological role.
INS 300 commonly shows up on Indian packets in these categories:
Food-grade ascorbic acid is produced by bacterial fermentation of glucose (typically using Acetobacter or Gluconobacter species). No animal product is used in its manufacture.
FSSAI: Permitted by FSSAI as an antioxidant under Schedule I of the FSS (Food Products Standards and Food Additives) Regulations 2011, and separately as a fortification nutrient under the FSS (Fortification of Foods) Regulations 2018.
JECFA: Group ADI 'not specified' for ascorbic acid and its sodium, potassium, and calcium salts, established at the 17th JECFA (1973). The same compound is an essential vitamin (Vitamin C) with a recommended daily intake of 40-90 mg per adult.
On packets, in recipes, and in conversation, INS 300 is also called:
Last verified: 2026-04-29.