Best Supplements for Reduced Oral Mucositis Severity
Ranked by research evidence. Compare 25 supplements across 39 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Moderate evidence5 studies
Across 5 studies, 3 reported beneficial effects of L-glutamine on reducing oral mucositis severity, with effect sizes ranging from small to moderate; 2 studies found neutral effects. The evidence is drawn from clinical populations, primarily patients with cancer undergoing treatment, with a median study duration of 49 days. The most-studied dose was 5 g of L-glutamine (in one study), though dosing information was limited.
- Low evidence3 studies
Across 3 studies, 2 reported beneficial moderate-sized effects of Streptococcus salivarius K12 on reducing oral mucositis severity, while 1 showed a neutral effect. The strongest evidence comes from a single randomized controlled trial (RCT) in 160 patients with head and neck tumors undergoing radiotherapy, where the probiotic significantly reduced the incidence of severe oral mucositis (36.6% vs 54.2%, p=0.035). Effects appear moderate in magnitude, but the evidence base is limited and findings are mixed.
Dose: thrice daily (lozenges) - Low evidence3 studies
Across 3 studies (2 beneficial, 1 neutral), aloe vera shows moderate evidence for a small beneficial effect in reducing oral mucositis severity among cancer patients receiving treatment. One meta-analysis (n=131) reported a statistically significant small benefit, while a 2023 systematic review also found significant moderate-sized effects in head and neck cancer patients; however, a 2025 systematic review in pediatric oncology found no significant benefit. Dose, form, and study duration were not consistently reported across studies.
- ModerateL-GlutamineAcross 5 studies, 3 reported beneficial effects of L-glutamine on reducing oral mucositis severity, with effect sizes ranging from small to moderate; 2 studies found neutral effects. The evidence is drawn from clinical populations, primarily patients with cancer undergoing treatment, with a median study duration of 49 days. The most-studied dose was 5 g of L-glutamine (in one study), though dosing information was limited.3 beneficial2 neutral5 studies
- LowStreptococcus salivarius K12Across 3 studies, 2 reported beneficial moderate-sized effects of Streptococcus salivarius K12 on reducing oral mucositis severity, while 1 showed a neutral effect. The strongest evidence comes from a single randomized controlled trial (RCT) in 160 patients with head and neck tumors undergoing radiotherapy, where the probiotic significantly reduced the incidence of severe oral mucositis (36.6% vs 54.2%, p=0.035). Effects appear moderate in magnitude, but the evidence base is limited and findings are mixed. · Dose: thrice daily (lozenges)2 beneficial1 neutral3 studies
- LowAloe VeraAcross 3 studies (2 beneficial, 1 neutral), aloe vera shows moderate evidence for a small beneficial effect in reducing oral mucositis severity among cancer patients receiving treatment. One meta-analysis (n=131) reported a statistically significant small benefit, while a 2023 systematic review also found significant moderate-sized effects in head and neck cancer patients; however, a 2025 systematic review in pediatric oncology found no significant benefit. Dose, form, and study duration were not consistently reported across studies.2 beneficial1 neutral3 studies
- Lowplantain leafAcross 3 studies, 2 reported beneficial moderate-sized effects of plantain leaf on reducing oral mucositis severity in cancer patients, while 1 small neutral trial found no significant benefit. The evidence base is small and preliminary, with effects observed primarily in clinical populations of patients with cancer undergoing radiation or chemotherapy.2 beneficial1 neutral3 studies
- LowHoneyAcross 3 studies, 1 reported a small beneficial effect of honey on reducing oral mucositis severity, while 2 found neutral effects. The evidence base is small and preliminary, with a median study duration of 14 days. Most studies examined clinical populations of cancer patients undergoing chemotherapy or radiotherapy.1 beneficial2 neutral3 studies