Bad breath is not a vitamin deficiency. The sailors in the past could not eat fresh vegetables and fruits for several months at sea, and got scurvy due to severe vitamin C deficiency, which led to bleeding gums and bad breath. But with our current living conditions, it is impossible not to eat vegetables and fruits for three months, so there is no lack of vitamins that can lead to gingivitis and bad breath. The main reason for the appearance of bad breath is caused by poor oral hygiene. If you have tooth decay, gingivitis, periodontitis, you will have bad breath, poor digestion, stomach fire is also easy to have bad breath. Therefore, if you have bad breath, go to a regular hospital for examination and treatment, bad breath can be cured. Whatever the cause of bad breath, you must pay attention to oral hygiene, brush your teeth regularly, rinse your mouth more, drink more green tea with clove tea drink, bad breath will be relieved.