I+G:

1. Characters:
1). Appearance: white crystal or powder; 
2). Technological and quality parameters: all according to those of monosodium glutamate made in China;
3). Being used as delicious flavoring in diet, fast food, soup, soy, sauce and other kinds of snack.

2. Introduction: 

I+G, is the flavor enhancers which are synergistic with glutamates in creating the taste of umami. It is a mixture of disodium insinate (IMP) and disodium guanylate (GMP) and is often used where a food already contains natural glutamates (as in meat extract) or added monosodium glutamate (MSG). It is primarily used in flavored noodles, snack foods, chips, crackers, sauces, and fast foods. It is produced by combining the sodium salts of guanylic acid and inosinic acid. A mixture of 98% monosodium glutamate and 2% disodium 5-ribonucleotides has four times the flavor enhancing power of mono-sodium glutamate alone.