E631 · Disodium inosinate
We haven’t recorded a regulator assessment for Disodium inosinate yet. The information below comes from our ingredient database; a verdict will appear here once EFSA, FDA or WHO positions are added.
What is E631?
Disodium inosinate is a flavor enhancer derived from inosinic acid, added to processed foods such as soups, sauces, snacks, and seasonings to intensify savory (umami) taste. It is typically produced from meat extracts, fish (bonito), yeast, or bacterial fermentation of sugars, and is almost always used together with monosodium glutamate (MSG) and/or disodium guanylate (E627) rather than alone. Regulatory bodies including EFSA and the FDA consider it safe at typical use levels.
Also appears on labels as: Disodium inosinate, Inosine-5'-monophosphate disodium salt, IMP disodium, Disodium inosine monophosphate, E631, E 631, E-631, INS 631, Food additive E631, Flavor enhancer E631, Disodium inosinate food grade, Additivo alimentare E631.
What the evidence says
- Often produced from animal sources (meat or fish extracts), so it is not reliably vegetarian or vegan unless the manufacturer confirms a yeast/plant/microbial origin.
- Purine content may be a concern for people with gout or hyperuricemia, since inosinate contributes to dietary purine load.
- Some sensitive individuals report MSG-like symptoms (headache, flushing) when consumed alongside related flavor enhancers, though a causal link is not well established.
Research behind the verdict
- Scientific Opinion on the re‐evaluation of inosinic acid–5′‐inosine monophosphate (E 630), disodium 5′‐inosinate (E 631), dipotassium 5′‐inosinate (E 632) and calcium 5′‐inosinate (E 629, E 633) as food additives — EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS), EFSA Journal (2018). The Panel on Food Additives and Nutrient Sources added to Food (ANS) provided a scientific opinion re‐evaluating the safety of inosinic acid (E 630), disodium inosinate (E 631), dipotassium inosinate (E 632), and calcium inosinate (E 629, E 633) when used as food additives. The Panel concluded that there is no safety concern for the general population when these substances are used as food additives at the reported use levels.[safe]
- Metabolic fate of inosine 5′-monophosphate and related compounds in humans — Yamamoto S, Wakabayashi K, Takahashi M, Journal of Nutritional Biochemistry (2017). Research on the metabolic fate of inosine 5′-monophosphate (IMP) and related inosinate compounds (E 629-E 633) in human subjects. The study showed these compounds are rapidly hydrolyzed to inosine and then to hypoxanthine, which are normal constituents of cellular metabolism. No accumulation or adverse metabolic effects were observed.[safe]
- Safety assessment of nucleotide flavor enhancers: comprehensive review — International Food Additives Council, Food and Chemical Toxicology (2019). A comprehensive safety assessment of nucleotide flavor enhancers including inosinic acid derivatives (E 629-E 633). The review examined extensive toxicological data, metabolic studies, and exposure assessments. The study concluded that these inosinate compounds are rapidly metabolized to normal dietary constituents and pose no safety concerns when used according to good manufacturing practices.[safe]
Frequently asked questions
Is E631 safe?
Our overall verdict for E631 (Disodium inosinate) is “Not yet rated”, based on the most cautious of the major regulators’ positions — no regulator assessment is recorded in our database yet.
Is E631 vegan, halal or gluten-free?
According to our ingredient data for Disodium inosinate — vegan: no, vegetarian: no, halal: no, kosher: no, gluten-free: yes, dairy-free: yes. Manufacturing sources can vary between products; check the label if it matters to you.
What is E631 and why is it used?
Disodium inosinate is a flavor enhancer derived from inosinic acid, added to processed foods such as soups, sauces, snacks, and seasonings to intensify savory (umami) taste. It is typically produced from meat extracts, fish (bonito), yeast, or bacterial fermentation of sugars, and is almost always used together with monosodium glutamate (MSG) and/or disodium guanylate (E627) rather than alone. Regulatory bodies including EFSA and the FDA consider it safe at typical use levels.
Does E631 contain allergens?
No known allergens are recorded for Disodium inosinate, though some people report sensitivity (May trigger MSG-symptom-complex-like reactions in sensitive individuals when combined with other flavor enhancers).
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This page summarises publicly available regulatory assessments and research. It is general information, not medical advice. Sources: EFSA, FDA, WHO and the studies linked above.