Diet & Nutrition

Coconut Oil May Someday Help Fight Infections

Coconut oil could help reduce the use of antifungal drugs, say researchers who have discovered that it controls the pathogen known as C. albicans.

A new inter-disciplinary study led by researchers at Tufts University made the discovery while studying  mice. In humans, high levels of C. albicans in the gastrointestinal tract can lead to bloodstream infections, including invasive candidiasis. The research, published in mSphere, suggests that it might be possible to use dietary approaches as an alternative to antifungal drugs in order to decrease the risk of infections caused by C. albicans.

C. albicansis part of the gastrointestinal tract’s normal flora and well-regulated by the immune system. When the immune system is compromised, however, the fungus can spread beyond the GI tract and cause disease. Systemic infections caused by C. albicans can lead to invasive candidiasis, which is the fourth most common blood infection among hospitalized patients in the United States according to the CDC. The infection is most common among immunocompromised patients, including premature infants and older adults.

Antifungal drugs can be used to decrease and control C. albicans in the gut and prevent it from spreading to the bloodstream, but repeated use of antifungal drugs can lead to drug resistant-strains of fungal pathogens. In order to prevent infections caused by C. albicans, the amount of C. albicans in the gastrointestinal tract needs to be reduced.

The team, led by microbiologist Carol Kumamoto and nutrition scientist Alice H. Lichtenstein, investigated the effects of three different dietary fats on the amount of C. albicans in the mouse gut: coconut oil, beef tallow and soybean oil. A control group of mice were fed a standard diet for mice. Coconut oil was selected based on previous studies that found that the fat had antifungal properties in the laboratory setting.

A coconut oil-rich diet reduced C. albicans in the gut compared to a beef tallow-or soybean oil-rich diet. Coconut oil alone, or the combination of coconut oil and beef tallow, reduced the amount of C. albicans in the gut by more than 90% compared to a beef tallow-rich diet.

“Coconut oil even reduced fungal colonization when mice were switched from beef tallow to coconut oil, or when mice were fed both beef tallow and coconut oil at the same time. These findings suggest that adding coconut oil to a patient’s existing diet might control the growth of C. albicans in the gut, and possibly decrease the risk of fungal infections caused by C. albicans,” said Kumamoto, Ph.D., a professor of molecular biology and microbiology at Tufts University School of Medicine and member of the molecular microbiology and genetics program faculties at the Sackler School of Graduate Biomedical Sciences.


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