Betalain turns yellow when heated at 100 degrees Celsius. According to relevant public information, when the temperature is 60°C, the color of the solution basically changes from purple-red to yellow after half an hour of heating. When the temperature is 100°C, the color of the solution basically changes to yellow after less than 15 minutes of heating. Betalain is a natural pigment extracted from the natural plant edible red beet (seaweed) with water as the solvent. The main component of betalains is betalains, which account for 75% to 95% of the red pigment. Sometimes there is also free betalains. Betalains also contain betalains, isobetatins, red glycosides and other ingredients. Probetyl betalain is a pyridine derivative. Beet pigments are easily soluble in water and insoluble in fat.