Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Vitamin C (ascorbic acid) is sometimes used to support or treat canker sores (aphthous ulcers) based on its role in immune function and wound healing. There is some scientific rationale for its use: Vitamin C is essential for collagen synthesis and tissue repair and has antioxidant properties that may help modulate the local immune response in the oral mucosa. A few small clinical studies and case reports have suggested that vitamin C supplementation may reduce the duration or severity of canker sores, particularly in individuals with low vitamin C status or recurrent ulcers. For example, a randomized controlled trial published in Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology (1994) found that high-dose vitamin C supplementation reduced healing time in patients with recurrent aphthous ulcers. However, other studies have not shown clear benefit, and evidence remains limited by small sample sizes and lack of standardized protocols.

Overall, while there is some scientific basis and limited clinical evidence supporting the use of vitamin C for canker sores, the quality and quantity of evidence are low, and routine use is not universally recommended. The effect may be most relevant in cases of vitamin C deficiency. More robust clinical trials are needed to clarify its efficacy.

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Other ingredients used for Canker Sores

Other health conditions supported by Vitamin C (unspecified)

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