He believes that the key is not only the pH of the beverage itself, but also how high the acidity of the beverage can be maintained in the presence of saliva and other substances that may affect acidity - the so-called "buffering capacity." They exhausted the order by assessing the buffering capacity of different beverages: carbonated beverages that are not made from fruits, such as cola, are the most acidic (slightly good for Diet Coke), followed by carbonated beverages, juices and coffee based on fruits. In other words, some carbonated drinks can destroy the hardness of the enamel.
Poonam Jain of the University of Southern Illinois School of Dentistry conducted another experiment: he extracted the extracted enamel for 6 hours, 24 hours and 48 hours in different soft drinks and found enamel. Start to corrode. Some people think that this is not the same as the scene in real life, because we can't put the drink in the mouth for a long time. However, even if you drink a drink for only a few seconds, it will have a major impact due to years of accumulation.
Image caption The corrosive effects of sweet carbonated drinks will accumulate over time (Source: Getty Images) A case study published in 2009 showed that a 25-year-old bank employee’s front teeth were consumed after long-term consumption of carbonated drinks. Corroded. He had previously consumed 0.5 liters of cola per day for four consecutive years, and increased the number to 1.5 liters per day for the next three years, plus some juice. This intake is enough to shock everyone. But it also depends on how you drink. According to the study, the man would drink the drink for a few seconds each time, and taste it before swallowing it. Swedish researchers compared the short-term sipping, long-term sipping, swallowing and sucking several drinks, and found that the longer the beverage stayed in the mouth, the higher the acidity of the mouth. But if you suck the drink directly into the back of the mouth through a straw, the probability of damage is much lower.
But what if it is bubble mineral water? Catriona Brown of the University of Birmingham soaked the isolated human teeth without signs of corrosion in different flavors of bubble water for 30 minutes and observed the reaction. The surfaces of these teeth were coated with a layer of varnish, leaving a test area approximately half a centimeter in diameter without varnishing. They found that these drinks have the same effect on the teeth, sometimes even more than the effects of orange juice - scientists already know that orange juice can soften the enamel. Lemon, lime and grape-flavored bubbles are the most acidic, probably because they use citric acid to improve the taste.
Image caption Research shows that the acidity of bubble water is only 1% of that of carbonated carbonated beverages, so the bubble water added with flavor is not as harmless as boiled water. But what is the situation with odorless bubble water? Little research has been done on this issue. But in 2001, the Birmingham team tested seven different brands of sparkling mineral water and then poured it onto the isolated teeth to see the reaction. They found that the pH of the bubble water was between 5 and 6 (so the acidity was not as good as some cola drinks up to 2.5), while the pH of the boiled water was 7, which was neutral. In other words, the bubble water is indeed weakly acidic as many people have guessed. However, the corrosive effect of this weakly acidic beverage is only 1% of other carbonated beverages. Of course, the oral environment is different from that of a jar, but at present it seems that the evidence that bubble water will endanger human health is not conclusive.
Therefore, for those who do not want to drink boiled water, although the bubble water is weakly acidic, there is no conclusive evidence to show that it will cause damage to your bones, stomach and teeth. But if you don't want to take risks, try not to let it touch your teeth. Next time someone asks you "white water or bubble water", maybe you should also have a straw.