Q Dear Dr. V,
I read that Bye-Lori can work against yeast. I have chronic vaginal yeast infections. Would Bye-Lori work for this?


A Dear TB,
Bye-Lori contains mastic, a gum resin that exudes from the trunk of the mastic tree (Pistacia lentiscus). It has been shown to possess antimicrobial activity against H. pylori and various other bacteria. Recently, three essential oils obtained by the steam distillation of the gum, leaves, and twigs of the mastic tree were studied, and 69 constituents were identified.1 These oils and some of their individual constituents have been shown to possess different antimicrobial activities and to significantly reduce various undesirable bacterial colonies. Mastic gum was found to be significantly more active compared to the other constituents. In addition, mastic gum was able to destroy various harmful fungi, such as the common Candida albicans (a known culprit in most vaginal yeast infections), Candida tropicalis, and Torulopsis glabrata.

But since these studies were performed in vitro (in glass) rather than in vivo (in or on the body), there is no evidence that Bye-Lori is an effective or appropriate treatment for the eradication of yeast infections. Based on these studies, however, I believe it is plausible that Bye-Lori may be helpful for yeast overgrowth of the gastrointestinal tract, which begins at the mouth. Anecdotal evidence lends support to this conclusion.

Bye-Lori is essentially innocuous, and a trial use of it is very likely to be harmless. It is not, however, a substitute for standard medical treatment where appropriate. I do not believe that Bye-Lori, which is taken orally, would be helpful for vaginal yeast infections, because there would be little opportunity for the mastic to make contact with the microorganisms.

I hope this helps.

Dr. V


  1. Magiatis P, Melliou E, Skaltsounis AL, Chinou IB, Mitaku S. Chemical composition and antimicrobial activity of the essential oils of Pistacia lentiscus var. chia. Planta Med 1999 Dec;65(8):749?52.

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