Interest in coconut oil for oral health has grown significantly in recent years. What began as a traditional practice has become the subject of microbiological and clinical research. Today, the key question is not whether it is “natural,” but whether it works, how it works, and in what context it is useful.
1) The origin of coconut oil and its traditional use
1A) Origin of coconut oil
Coconut oil is a vegetable fat obtained from the fruit of the coconut tree (Cocos nucifera).
1B) Traditional uses of coconut oil in oral hygiene
Beyond its current popularity, its use in oral hygiene is related to traditional practices of Ayurvedic medicine (Ayurveda). A healthcare system originating in India with over 3,000 years of history. Within this tradition are described… oral hygiene techniques based on “oil rinses”, known as GandushatheKavala (what has become popular today as oil pulling).
1C) Coconut oil today
The difference is that, nowadays, for a treatment to be considered “effective,” it is not enough for it to be an old, traditional, or “natural” practice: what matters is verifying its effectiveness. What happens when you evaluate it with scientific methodology and test it on real patients and conditions?
2) Composition and lipid profile of coconut oil
The interest of coconut oil in oral health and sIts relevance in dentistry is not explained by a fad, but by its lipid profile, rich in medium-chain fatty acids.
2A) Lauric acid and its biological effects
Among these medium-chain fatty acids, the following stand out: lauric acid which represents approximately 50% of its composition, along with capric and caprylic acids. These lipids have been studied for their ability to:
- Altering bacterial membranes and hinder their survival (a mechanism especially described in the face of Gram-positive bacteria).
- Biological effects related to the control of inflammation.
2B) Lauric acid as a possible adjunct in oral health
These properties explain why coconut oil has aroused interest as a possible aid in oral hygiene and health. Translated into consultation language: if the “bacterial pressure” can be reduced and, at the same time, the “inflammatory noise” of the gum can be lowered, the oral environment can become more stable.
3) Research on the benefits of coconut oil
That hypothesis is precisely the one that Dr. Simón Pardiñas decided to test it with a complete clinical design. For years, “coconut oil for gums” has been a popular recommendation, a social media tip, and a wellness routine. But tradition is one thing… and reality is quite another. To demonstrate using clinical methodology what actually happens in the mouth of a patient with periodontitis.
3A) La tesis doctoral del Dr. Simón Pardiñas sobre el aceite de coco
Dr. Simón Pardiñas López has recently completed his doctorate (UDC, 2025) focused on a specific and, at the same time, controversial question:
Can coconut oil provide a real, measurable, and safe benefit as an adjunct to periodontitis treatment? This research was conducted by Dr. Simón Pardiñas, using facilities and patients from Pardiñas Dental Clinic, in collaboration with research and microbiology teams.
3B) The available scientific evidence on coconut oil
One of the first significant findings was presented in the field of microbiology. Researchers from Athlone Institute of Technology (Ireland) demonstrated that coconut oil subjected to enzymatic digestion showed a potent antibacterial action.
3C)Digested coconut oil and tooth decay
In this studyin vitroCoconut oil treated with enzymes (simulating human digestion) significantly inhibited the growth of several strains of Streptococcus including:
- Streptococcus mutans, a key bacterium in the development of tooth decay due to its acid production and its ability to adhere to enamel.
In addition, activity was observed in front of Candida albicans, a yeast implicated in oral candidiasis.
These results support the idea that the products of human digestion can generate compounds with antimicrobial effects, which opens the door to applications in dental care products.
4) Clinical trial on coconut oil in periodontitis
Beyond laboratory studies, the decisive step is to evaluate what is happening in real patients. This leap forward is thanks to recent clinical research on Dr. Simón Pardiñas López (University of A Coruña, 2025).
4A) Why study coconut oil in periodontitis?
Periodontitis is a very common chronic inflammatory disease and one of the main causes of tooth loss in adults.It often begins with signs that normalize: Bleeding gums when brushing, persistent bad breath, a feeling of swelling, or loose teeth. But it’s not just about gingival bleeding; it’s a dangerous and complex process that combines:
- Bacterian biofilm (plaque) that becomes “disordered” and more aggressive (dysbiosis).
- An inflammatory response of the organism itself which, when maintained over time, ends up damaging the supporting tissues of the tooth.
5) Possible effects of coconut oil in periodontitis treatment
The clinical hypothesis proposes a double effect:
5A) Selective antimicrobial action
The fatty acids in coconut oil can disrupt bacterial membranes, reducing the load of microorganisms associated with periodontal disease without completely eliminating bacteria compatible with health.
5B) Local anti-inflammatory effect
Modulatory effects on inflammatory pathways (such as NF-κB) have been described, which helps to understand the reduction of inflammatory mediators in saliva. Simply put: fewer “problematic bacteria” and less “inflammatory alarm,” always as support, not as a replacement for periodontal treatment.
6) What was studiedexactly (and why this job is different)
6A) Characteristics of the clinical trial
The core of the doctorate includes a randomized, controlled, triple-blind clinical trial (patient, clinician and analyst did not know which product each person was using), comparing:
- Rinse with coconut oil.
- Rinse with clorhexidina 0,12%(classic reference in chemical control).
- Placebo comparable.
6B) Times for measuring the effect of the treatment
The protocol included several measurement points to distinguish the effect of rinsing from the effect of mechanical periodontal treatment: Samples at the beginning, after the rinsing period, and after non-surgical periodontal therapy.
6C) Clinical parameters evaluated
And here’s one of the key points: they didn’t “only” look at whether the bleeding was decreasing. Clinical parameters, microbiology, inflammation, and patient experience were analyzed:
- Periodontal clinic: plaque, bleeding on probing, probing depth and clinical insertion level.
- Microbiome in saliva and crevicular fluid with 16S rRNA sequencing and dysbiosis indices.
- Inflammation in saliva: cytokines such as IL-6 and TNF-α (can be understood as “chemical messengers” that increase when there is active inflammation).
- Objective halitosis: gas chromatography measuring volatile sulfur compounds (the classic culprits of bad odor).
- Quality of life and patient perception: OHIP-14 questionnaire and tolerability scales (burning, dryness, taste, staining).
In fact, the thesis highlights as a differentiating contribution that It was the first known study to apply OHIP-14 to assess patient-centered outcomes in the context of coconut oil rinses, and one of the first to jointly evaluate microbiota, halitosis, cytokines and patient experience.
7) Key results explained clearly
The most relevant findings can be summarized as follows:
7A) Actual clinical improvement (gums and tooth support)
Both coconut oil and chlorhexidine improved plaque and bleeding compared to placebo. In addition, improvements were observed in probing depth and clinical insertion, with early signs favorable for the coconut oil group in some parameters.
7B) Changes in bacteria: less “pathogenic”, more “compatible with health”
During the rinsing period, coconut oil group showed a reduction in bacterial load and a decrease in taxa associated with chronic inflammation (including classic periodontal complexes), while preserving or increasing commensal genera related to oral health.
7C) Less inflammation: IL-6 and TNF-α decrease
In the coconut oil group, a decrease in IL-6 and TNF-α was recorded in saliva. To put it simply: fewer chemical signals associated with active inflammation.
7D) Better breath as measured by a gas spectrophotometer
Volatile sulfur compounds were reduced (the typical gases of bad breath) after the rinsing phase with coconut oil and chlorhexidine, with stable salivary pH.
7E) And a decisive point: better tolerability and better patient experience
Coconut oil was associated with less burning and less dryness than chlorhexidine and without the typical pattern of tooth staining. Furthermore, oral quality of life indicators improved early in this group.
8) Important message: Coconut oil is not a substitute for periodontal treatment
The practical conclusion is clear and prudent: Coconut oil is not a substitute for periodontal treatment (diagnosis, plaque control, scaling and root planing, and maintenance). Its role, when properly indicated, is to adjuvant: a moderate chemical support, potentially useful to improve tolerability and adherence, and help control inflammation and bacterial load within a professional plan.
9) Conclusion: Tradition backed by science, but with nuances
Coconut oil has gone from being a traditional remedy to having microbiological and clinical evidence that supports its use as an aid in oral health. His interest lies not in being “natural”, but in his composition, mechanisms of action, and measurable results. As with any intervention in dentistry, its use must be contextualized, informed, and supervised.integrating it into a professional, evidence-based approach.
10) Acknowledgments
This doctorate has been made possible thanks to the support of many people and institutions, including:
- Thesis supervision: Dr. Silvia M. Díaz Prado, Dr. Isaac M. Fuentes.
- Address of foreign residence (NYU): Dr. Ismael Khouly.
- INIBIC Group.
- Microbiology CHUAC – Meigabiome.
- Pardiñas Medical and Dental Clinic (team and, especially, participating patients).
- UDC funding for article publication.
