The prevention of bacterial vaginosis could depend on what you eat

According to a study, a low intake of betaine, found in sugar beet, seafood, wheat bran and spinach, could increase the risk of vaginosis. Betaine also plays a key role in liver, cardiovascular and kidney health.

Created 14 January 2020
Updated 14 May 2024
Actu GP : La prévention des vaginoses bactériennes pourrait passer par l’assiette

About this article

Created 14 January 2020
Updated 14 May 2024

45% Almost 1 in 2 women say they take vaginal douches whereas it's bad for their vaginal microbiota


Bacterial vaginosis is a frequent, difficult-to-treat female disorder caused by an imbalance in the vaginal microbiota and characterized by a decrease in lactobacilli and an increase in potentially harmful bacteria, especially Gardnerella vaginalis. Despite antibiotic treatment, around 60% of affected women will relapse within the following year.

Change of method

Since a link between blood levels of some nutrients and the risk of bacterial vaginosis is suspected, many studies have been conducted but their results have been inconsistent. The authors of a new study published in Reproductive Health believe it is due to the methods used in these studies which are based on vaginal swabs or clinical endpoints and mainly focused on vitamin D. To examine the association between the use of dietary supplements and bacterial vaginosis, they analyzed the composition of the vaginal microbiota of 104 young women, including 25% with bacterial vaginosis. They also analyzed their daily intake on micro- and macronutrients based on their answers to a benchmark questionnaire. The researchers also reviewed the scientific literature on this topic.

Higher betaine intake?

They managed to profile women with vaginosis: such women use more frequently vaginal douches, have a high body mass index, and less often use a hormonal method of contraception, compared to women with a balanced vaginal microbiota. Overall, those with lower nutrient intakes have a lower risk of vaginosis. However, betaine is the one exception since a limited intake increases the risk. In vitro, this substance seems to stimulate the survival of lactobacilli and the production of lactic acid, and to prevent colonization by pathogens. According to the authors, it acts directly on the vaginal microbiota by promoting bacterial balance or indirectly through the gut microbiota. This discovery opens up new perspectives to limit the risk of vaginosis, such as increasing betaine intake by changing diet or using dietary supplements.


Old sources


Tuddendham Susan, Ghanem Laura E., Rovner Lisha J. et al. Associations between dietary micronutrient intake and molecular-Bacterial Vaginosis, Reproductive Health. 16:151 2019.

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