The Summary
This double-blind, placebo-controlled pilot study evaluated whether a three-month multi-strain probiotic regimen could alter dietary intake in 53 participants (23 with major depression and 30 healthy controls). Researchers tracked nutritional intake at four timepoints using the Vienna Food Record. While the probiotics did not cause widespread or consistent changes in diet, exploratory results revealed small, time-dependent patterns. Specifically, the probiotic group showed shifts in vitamin D intake and experienced slightly lower overall dietary variety and diversity scores at certain points compared to those taking a placebo.
Why this is interesting
We know the gut-brain axis influences mood and appetite, leading to the theory that altering gut microbes might naturally shift our food cravings. This study shows that while probiotics might subtly influence specific nutrients like vitamin D, they do not dramatically rewrite our eating habits. For consumers, this means you cannot rely on a daily probiotic capsule to magically improve your diet or curb cravings. Eating a diverse, whole-food diet remains the most reliable way to nourish your microbiome, rather than expecting a pill to change what you eat.