The bacterium Lactobacillus vaginalis can break down zinc bound to phytate in wheat bran, releasing zinc and specific inositol phosphate compounds that may be more easily absorbed by the body.

We’ve found so far that Lactobacillus vaginalis may help release zinc from phytate in wheat bran, potentially making the zinc easier for the body to absorb [1]. This is based on one assertion that describes how the bacterium breaks down zinc-phytate complexes, producing specific inositol phosphate compounds that could improve zinc availability. No studies or claims contradict this observation. The evidence we’ve reviewed leans toward the idea that this particular strain of bacteria has the ability to interact with phytate — a compound in plant foods like wheat bran that can bind to minerals like zinc and reduce their absorption. By breaking down this bond, Lactobacillus vaginalis might help free up zinc so it can be taken up more readily in the gut. However, this finding comes from a single assertion, and we don’t yet have data from human trials, dose responses, or comparisons to other strains or foods. We don’t know if this effect happens in the vagina, the gut, or in food during fermentation. We also don’t know how much zinc is actually released, or whether this translates to measurable changes in zinc levels in the body. The mechanism is described, but the real-world impact remains unclear. What this means for you: If you eat whole grains and are concerned about zinc absorption, this finding hints that certain bacteria might help — but it’s too early to say whether eating or using Lactobacillus vaginalis will make a difference in your zinc status. More research is needed to see if this works in people, and under what conditions.