Is bad breath caused by a lack of vitamins?

Bad breath may be associated with vitamin deficiencies, but it is not the sole cause. Specifically, deficiencies in vitamins B1, B12, and C may be related to halitosis to some extent. A deficiency in vitamin B1 may affect gastrointestinal motility, causing gastrointestinal disorders such as indigestion, which can lead to bad breath. A deficiency in vitamin B12 may cause inflammation of the oral and gastrointestinal mucosa and may be a potential factor in halitosis. Long-term deficiency of vitamin C can lead to glossitis, gingivitis, and even gingival erosion and bleeding, which may also cause bad breath. The causes of halitosis are varied and also include oral infections, digestive system diseases, metabolic disorders, and ear, nose, and throat diseases. Therefore, halitosis should not simply be attributed to vitamin deficiency. If symptoms of bad breath occur, it is recommended to seek medical attention promptly to identify the cause and receive targeted treatment. At the same time, maintaining good oral hygiene, a balanced diet, and moderate vitamin supplementation can also help prevent and improve halitosis.