Dietary (poly)phenols, the gut-brain axis, and menopause: a perspective on an overlooked biological crossroad.
García-Nicolás M, Jarrín-Orozco MP, Romo-Vaquero M, Martínez-Nortes ME, Ávila-Gálvez MÁ
Gut Microbiome
The blueberries, pomegranates, and green tea you grow or buy aren't just antioxidant-rich foods—your gut bacteria may transform their compounds into substances that protect your brain and stabilize mood, especially as hormones shift with age.
Plants make colorful protective chemicals called polyphenols. When you eat them, your gut bacteria break them down into new molecules that can travel to the brain and influence how you think and feel. This review found that no studies have directly tested this in menopausal women yet, even though menopause changes both gut bacteria and brain chemistry in ways that could make plant compounds especially powerful—or unpredictable.
Key Findings
No human clinical trial has investigated how dietary polyphenols affect gut-brain outcomes specifically in postmenopausal women, representing a major gap in nutrition research.
Gut microbiome 'metabotypes'—particularly equol-producing (from soy isoflavones) and urolithin-producing (from pomegranate and berries) types—vary widely between individuals and determine whether polyphenols produce meaningful biological effects.
Chronic medications common in postmenopause reshape the gut microbiome's composition and function, altering how polyphenols are metabolized and potentially undermining or amplifying their effects on brain health.
chevron_right Technical Summary
A new review argues that plant-derived polyphenols—compounds from colorful fruits, vegetables, and herbs—may support brain health and mood in postmenopausal women by interacting with gut bacteria, but no clinical trials have yet tested this directly. The authors call for precision nutrition research that accounts for individual differences in how people's gut microbes process these plant compounds.
Abstract Preview
Hormonal decline, chronic low-grade inflammation, metabolic alterations and polypharmacy shape the postmenopausal period. These factors remodel the gut microbiota and influence the production of mi...
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