How can hypochlorous acid mouthwash support gum health?
Hypochlorous acid (HOCl) mouthwash can support healthier gums by helping reduce oral bacteria around the teeth and gumline. Less bacterial burden means fewer opportunities for plaque-associated bacteria to contribute to inflammation. Used alongside brushing and flossing, HOCl can help support a healthier environment around the gums.
How Do Oral Bacteria Affect Gum Health?
Dental plaque is a bacterial biofilm—a structured community of bacteria that attaches to teeth and builds up along the gumline. When plaque-associated bacteria accumulate there, they can trigger an inflammatory response that may lead to redness, swelling, tenderness or bleeding.[1]
That is why controlling plaque and bacterial buildup is central to maintaining healthy gums.[1] Brushing and cleaning between teeth physically disrupt and remove plaque biofilm, while an antimicrobial mouthwash can provide an additional step to help reduce oral bacteria.[2] For a broader overview, see Hypochlorous Acid for Oral Care: Uses, Safety, and Fresh Breath.
How Can HOCl Mouthwash Support Healthier Gums?
HOCl is an antimicrobial that can help reduce bacteria in the mouth.[3][4] By helping lower bacterial burden around the teeth and gumline, HOCl can reduce opportunities for plaque-associated bacteria to contribute to inflammation.[1][3]
HOCl mouthwash works best after mechanical cleaning. Brushing and flossing help disrupt and remove plaque biofilm; swishing with HOCl then provides an antimicrobial step that can help reduce bacteria on oral surfaces and along the gumline.[2][4] Mouthwash complements brushing and cleaning between teeth—it does not replace them. See How to Use Hypochlorous Acid Oral Rinse for step-by-step directions.
What Does Research Say About HOCl Mouthwash and Gum Health?
A randomized clinical study found that 100 ppm HOCl mouthwash significantly reduced salivary bacterial counts under the conditions studied.[3] Laboratory research has also demonstrated antimicrobial activity of HOCl against bacteria within multispecies oral biofilms.[4]
More recent periodontal research is also investigating how HOCl interacts with pathogenic biofilms, including changes in biofilm structure and bacterial activity.[5] These findings are promising, but much of this newer work is still laboratory or preclinical research rather than direct evidence that HOCl mouthwash treats gingivitis or periodontal disease. For a deeper review of the evidence, see What Does the Research Say About Hypochlorous Acid Mouthwash?
HOCl mouthwash is best viewed as an adjunct to brushing, flossing and professional dental care.
River Refresh Oral Rinse is formulated with 100 ppm HOCl at pH 6.0 ± 0.2 for everyday oral hygiene and is best to be used after brushing and flossing.
Persistent bleeding, swelling, pain or gum recession should be evaluated by a dental professional.
River Refresh
Oral Rinse
Freshly activated 100 ppm HOCl oral rinse for fresh breath and everyday oral hygiene.
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References
1. Periodontal (Gum) Disease
National Institute of Dental and Craniofacial Research. National Institutes of Health. Reviewed August 2026. View Source
Explains how plaque bacteria along the gumline can trigger inflammation and describes signs including red, swollen or bleeding gums.
2. Mouthrinse (Mouthwash)
American Dental Association. ADA Oral Health Topics. Updated 2026. View Source
Provides guidance on mouthrinse as an adjunct to brushing and interdental cleaning rather than a replacement for mechanical oral hygiene.
3. Effects of Hypochlorous Acid Mouthwash on Salivary Bacteria Including Staphylococcus aureus in Patients With Periodontal Disease: A Randomized Controlled Trial
Lin YC, Tsai CF, Huang HL. BMC Oral Health. 2023. View Study | PubMed
Randomized controlled trial evaluating 100 ppm HOCl mouthwash and demonstrating significant reductions in salivary total bacterial counts in patients with periodontal disease under the study conditions.
4. Effects of Stabilized Hypochlorous Acid on Oral Biofilm Bacteria
Aherne O, Ortiz R, Fazli MM, Davies JR. BMC Oral Health. 2022. View Study | PubMed
Laboratory study demonstrating antimicrobial activity of stabilized HOCl against multispecies oral biofilms representing supra- and subgingival bacterial communities.
5. Hypochlorous Acid Solution Inhibits Periodontal Pathogenic Biofilms Through ROS Induction and Quorum Sensing Suppression
Zhang Y, et al. Journal of Oral Microbiology. 2025. View Study
Laboratory and preclinical research evaluating HOCl against periodontal pathogenic biofilms, including effects on biofilm structure and bacterial signaling.
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