Pearl milk tea in the pearl, normally said to be made of tapioca starch, tapioca starch in the branched chain starch content of up to 83%, so you can make the mouth feel very Q pearl.

Starch is divided into straight chain starch and branched chain starch.

Straight-chain starch can be hydrolyzed to maltose by amylase, so when you eat cereal containing straight-chain starch, it gets sweeter the more you chew it. At the same time, straight chain starch can be dissolved in hot water, but will not form a paste. The most obvious manifestation of this is the blue coloration when exposed to iodine.

Branched-chain starch has only peripheral branched chains that can be hydrolyzed to maltose by amylase, so it is not as sweet to chew as straight-chain starch. It is worth noting that it is insoluble in cold water, and hot water is swollen into a paste, and viscous, elastic, which is what we call thickening. Unlike straight-chain starch, it is purple or reddish-purple when exposed to iodine.

Expanded Information

Dangerous

All starchy food enters the digestive tract and produces dextrin, which is a degradation product obtained by incomplete hydrolysis of starch. We usually eat meals, eat bread and other starchy foods, after entering the digestive tract also gradually decompose dextrin, and then broken down into glucose in order to be absorbed by the body.

Whether the pearls will cause intestinal obstruction, it has to do with the consumer's gastrointestinal absorption function and the food items are related. Gastrointestinal function is not very good people, such as young children and the elderly, drinking a lot of pearl milk tea is still a risk. If a large number of swallowed pearl milk tea in the pearl, not only easy to cause gastric emptying is not smooth, but also will be inhaled into the organs of the risk.

References:

. p>People's Daily Online, "What are the Pearls in Pearl Milk Tea?

People's Daily Online, "What are the Pearls in Pearl Milk Tea, and Are They Harmful to the Human Body?