Qiu Sheng.
Height 186, weight 70 kilograms, thick hair, handsome as hell.
USTC biology PhD, scholarship awardee, nearly every boy's dream ultimate template.
But such a seemingly perfect person has an unspeakable hidden drawback:
He has halitosis.
According to Uptodate's statistics.
The prevalence of halitosis domestically is about 30%, meaning nearly 1 in every 3 people suffers from it.
In most cases, we have become accustomed to our own bad breath and therefore don't notice it much.
The causes of bad breath are actually quite simple, essentially stemming from two common factors:
20% attributed to Helicobacter pylori, 80% to microbial metabolism in the oral cavity.
The latter includes a large number of bacteria like Neisseria and Anaerobic Streptococcus as previously mentioned.
In fact.
The types and quantities of bacteria in the human oral cavity are numerous, with commonly known types amounting to about 500-600.
