Malic Acid
Being the primary acid in apples and its traditional use in energy-support supplements.
Malic acid is an organic compound studied for its potential roles in energy metabolism and saliva stimulation. It is often investigated for managing dry mouth and as a potential supportive treatment for fibromyalgia symptoms.
Quick answer
What it is: Malic acid is a naturally occurring dicarboxylic acid found in various fruits, most notably apples, and is a key intermediate in the Krebs cycle, which is central to cellular energy production.
May support:Fibromyalgia
Evidence:Evidence · Grade C
Evidence Summary
A systematic review indicates that malic acid has been evaluated as a treatment strategy for xerostomia and hyposalivation. It is often cited as a topical agent to provide temporary relief from dry mouth symptoms across various etiologies.
Last reviewed · Jun 2026
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Reported side effects
- gastrointestinal discomfort
- stomach upset
- diarrhea
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Overall grade (C)
A systematic review indicates that malic acid has been evaluated as a treatment strategy for xerostomia and hyposalivation. It is often cited as a topical agent to provide temporary relief from dry mouth symptoms across various etiologies.
Systematic Reviews(1)
Structured reviews of the full body of evidence (incl. Cochrane).
Treatment of xerostomia and hyposalivation in the elderly: A systematic review.
Gil-Montoya JA, Silvestre FJ, Barrios R, Silvestre-Rangil J · Medicina oral, patologia oral y cirugia bucal · 2016
Therapeutic strategies for xerostomia, regardless of etiology, have so far not had definitive or clearly effective results. To systematically revise the latest scientific evidence available regarding the treatment of dry mouth, regardless of the cause of the problem. The literature search was conducted in March 2015, using the Medline and Embase databases. The "Clinical Trial", from 2006 to March 2015, was carried out in English and only on human cases. The draft of the systematic review and assessment of the methodological quality of the trials was carried out following the criteria of PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) and the "Oxford Quality Scale". Finally, a total of 26 trials were identified that met the previously defined selection and quality criteria; 14 related to drug treatments for dry mouth, 10 with non-pharmacological treatment and 2 with alternative treatments. Pilocarpine continues to be the best performing sialogogue drug fo
Systematic ReviewPubMedVery High Quality
Limitations: Scientific evidence for malic acid is often categorized by small sample sizes or its use in combination with other substances like magnesium, making it difficult to isolate malic acid's specific effects. Systematic reviews have noted that definitive or clearly effective results for xerostomia treatments across all populations have not yet been established.
This page is educational. Statements use phrases like "may support" and "has been studied for"because no remedy here is approved to cure, treat, or reverse any condition. Discussion happens on the ailment pages — community statistics here are derived from those reports. Always consult a qualified clinician.
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