An article published in 2025 explains how nutrition influences our gut microbiome and, ultimately, how we age. Let’s take a look at what’s new in nutrition science that can help us take better care of our bodies as... the years go by!
What is aging, in simple terms?
Aging is defined as a complex biological process involving the gradual deterioration of cells, tissues, and organs, leading to reduced functionality and increased susceptibility to chronic diseases. As we age, our risk of developing conditions such as cancer, cardiovascular disease, neurodegenerative disorders, as well as musculoskeletal and immune-related issues, increases. The period of life during which we remain physically and mentally healthy is known as our “healthspan.” Healthspan can be significantly influenced by factors we can control—chief among them, our diet and the health of our gut microbiome.
What is the gut microbiome?
The gut microbiome is composed of trillions of microorganisms that play key roles in supporting human health. Maintaining a balanced microbial environment helps preserve the integrity of the intestinal barrier, regulate immune responses, support mitochondrial function (albeit indirectly), and combat oxidative stress. When this balance is disrupted, it can lead to chronic inflammation and increase the risk of age-related diseases.
How does our diet influence the microbiome?
One of the most important factors affecting the gut microbiome is diet. Specifically, as the article points out, dietary phytochemicals are a key element in maintaining a healthy microbiome.
What are phytochemicals?
Phytochemicals are bioactive compounds found in plant-based foods such as fruits, vegetables, nuts, and legumes. These compounds can influence the composition of the gut microbiota, reduce inflammation, and promote the diversification of beneficial bacterial species. Phytochemicals such as soy isoflavones, hesperetin from citrus fruits, and sulforaphane from cruciferous vegetables—as well as metabolites like urolithin A, which is produced via microbial conversion of ellagitannins found in foods like pomegranates, walnuts, and certain berries—have been associated with promoting healthy aging. Many of these metabolites are the result of gut microbiome processing and possess antioxidant, anti-inflammatory, and anticancer properties, contributing to both metabolic and cellular health.
Will everyone benefit equally from consuming these phytochemicals?
No, not everyone will experience the same benefits from consuming phytochemical-rich foods. This is because each individual has a completely unique gut microbiome composition. In other words, we don’t all have the same number or ratio of bacterial strains in our intestines. Since it’s the bacteria that process phytochemicals and ultimately produce the beneficial metabolites, it’s easy to understand why this production varies from person to person. Nevertheless, it’s important to remember that consuming phytochemicals, plant-based foods, probiotics, and prebiotics remains vital for our health and for preserving it for as much of our lives as possible.
Nutrition is a key factor that influences not only lifespan, but also its quality and, as it turns out, healthy aging. Through the consumption of phytochemicals and the maintenance of a healthy microbiome, we can reduce the risk of chronic diseases and support our body’s functions as we age.
Are you interested in healthy aging? Do you want the years to pass while still feeling well, strong, healthy, and joyful? If you’d like to enrich your diet and support a thriving microbiome, reach out to Dietitian-Nutritionist Katerina Magdalinou: https://kmagdalinou.com/en/contact.html
SOURCE
Beaver LM, Jamieson PE, Wong CP, Hosseinikia M, Stevens JF, Ho E. Promotion of healthy aging through the nexus of gut microbiota and dietary phytochemicals. Adv Nutr. 2025 Mar;16(3):100376. doi: 10.1016/j.advnut.2025.100376. Epub 2025 Jan 19.