The Best Nutrients for Supporting Your Gut Health

Interest in gut health has increased significantly in recent years, with content creators like Dr Karan Rajan underlining the importance of eating enough fibre and choosing foods that benefit gut bacteria. Additionally, Google Trends data shows searches for ‘foods for gut health’ have grown by a third in the last two years (54,000 in March 2024 to 72,000 in February 2026).

The digestive tract contains trillions of microorganisms that interact with the nutrients in the food we consume. Scientists continue to study how these microorganisms influence digestion, nutrient metabolism, and other physiological processes.

Supporting your digestive function is far more complex than simply increasing your intake of a single food or supplement. It reflects the combined influence of diet, lifestyle, sleep, stress levels, and physical activity.

Nutrition plays a central role because the foods people eat provide the nutrients that support digestion and shape the microbial composition of the gut.

A varied diet that includes fruits, vegetables, whole grains, and other plant-based foods helps supply the nutrients commonly associated with digestive health.

This guide explains the nutrients most often linked to gut health, identifies foods that contain them, and outlines how supplements may complement a balanced approach to nutrition.

What Does ‘Gut Health’ Actually Mean?

Gut health generally refers to the function of the digestive system and the balance of microorganisms living within it.

The digestive tract contains bacteria, fungi, and other microbes that interact with the food we consume. Together, these microorganisms form the gut microbiome.

These microbes help break down certain components of food that the body cannot digest on its own. Dietary fibre is one example – after fibre reaches the large intestine, gut bacteria ferment it and produce compounds involved in digestive processes.

Diet strongly influences the composition of the gut microbiome. Regular consumption of plant-based foods and fibre provides nutrients that many gut microbes rely on.

Information from the charity Guts UK explains that fibre supports normal bowel function and contributes to digestive health as part of a balanced diet.

Meanwhile, guidance from the NHS highlights foods such as whole grains, fruit, vegetables, and fermented foods as part of a diet that supports digestion.

Digestive health extends beyond dietary choices. Hydration, sleep patterns, physical activity, and stress levels all influence how the digestive system functions.

Because of this, gut health is usually approached as part of consistent dietary habits and broader lifestyle patterns over time.

Learn more in our guide – What are Gut Bacteria and Why do they Matter?

Why Nutrition Matters for Gut Health

Nutrition plays a central role in digestive health because the food we eat directly interacts with the microorganisms living in the digestive tract.

Many nutrients pass through the digestive system before they are absorbed or metabolised by the body. During this process, they also interact with gut microbes, which use certain dietary components as fuel.

Dietary fibre is one of the most widely studied examples. Unlike many other nutrients, fibre is not fully digested in the small intestine. Instead, it travels to the large intestine, where it can be fermented by gut bacteria.

According to Guts UK, fibre helps support normal bowel function and digestive health as part of a balanced diet.

Regular consumption of fibre-rich foods can also influence the composition of the gut microbiome. Foods such as whole grains, vegetables, fruits, legumes, nuts, and seeds provide a range of fibres and plant compounds that gut microbes can utilise.

Dietary variety also plays a role. Consuming a wide range of plant-based foods introduces different types of fibres and nutrients, which can contribute to a more diverse gut microbiome.

Alongside fibre, other dietary components such as fermented foods and plant compounds may also interact with gut microbes. The NHS highlights foods like yoghurt, kefir, vegetables, and whole grains as part of a diet that supports digestion.

Nutrition, therefore, influences gut health in several ways. It provides nutrients required for normal digestive processes, supplies fuel for certain gut bacteria, and contributes to the overall dietary patterns that shape the gut microbiome.

Because of this connection, many discussions of digestive health focus on the nutrients commonly found in foods associated with a gut-friendly diet.

Get to know how your gut works with our What is Your Gut Microbiome & Why is it Important? Guide.

The Best Nutrients for Supporting Gut Health

Digestive health is influenced by a wide range of nutrients that interact with the digestive system and the microorganisms living in the gut.

Rather than relying on a single ingredient, gut health is associated with consistent intake of several nutrients found across a varied diet. Many of these nutrients appear naturally in plant foods, whole grains, fermented foods, and other minimally processed ingredients.

Below are some of the nutrients most commonly associated with digestive health and the foods that provide them.

Dietary fibre

Dietary fibre is one of the most widely studied nutrients linked to digestive health.

Unlike many other nutrients, fibre is not fully broken down during digestion.

Instead, it passes into the large intestine, where certain gut bacteria ferment it. During this process, bacteria produce compounds involved in digestive processes.

Fibre also contributes to normal bowel function and helps maintain regular digestion when consumed as part of a balanced diet.

Foods that contain dietary fibre include:

• Whole grains such as oats, barley, and brown rice
• Fruits such as apples, berries, and pears
• Vegetables like broccoli, carrots, and leafy greens
• Legumes such as lentils, beans, and chickpeas
• Nuts and seeds

An unhealthy or low-fibre diet may lead to constipation. Learn how to prevent and relieve it in our Constipation Explained: Causes, Symptoms, and How to Get Relief blog.

Probiotics

Probiotics are live microorganisms that are naturally present in certain fermented foods. These microorganisms can become part of the gut microbiome when consumed through the diet.

Fermented foods have been part of traditional diets for centuries and remain a common dietary source of probiotics.

Foods that contain probiotics include:

• Yoghurt with live cultures
• Kefir
• Sauerkraut
• Kimchi
• Fermented vegetables

Prebiotics

Prebiotics are specific types of fibre that act as food for certain beneficial gut bacteria.

Because prebiotics are not digested in the upper digestive tract, they reach the large intestine, where they can be fermented by gut microbes.

Foods that contain prebiotic fibres include:

• Garlic
• Onions
• Leeks
• Asparagus
• Bananas
• Chicory root

Polyphenols

Polyphenols are naturally occurring compounds found in many plant foods. In addition to their antioxidant properties, they interact with gut bacteria during digestion.

Research suggests that gut microbes can metabolise polyphenols into smaller compounds.

Foods rich in polyphenols include:

• Berries
• Cocoa
• Green tea
• Grapes
• Olive oil

Magnesium

Magnesium is a mineral involved in hundreds of biochemical processes in the body, including those related to digestion and muscle function.

Magnesium contributes to normal energy-yielding metabolism and supports normal muscle function, which includes the muscles involved in digestive movement.

Foods that contain magnesium include:

• Nuts such as almonds and cashews
• Seeds, including pumpkin and sunflower seeds
• Whole grains
• Leafy green vegetables
• Legumes

Zinc

Zinc is an essential trace mineral involved in many physiological processes. It contributes to normal macronutrient metabolism and supports several cellular processes.

Foods that contain zinc include:

• Meat and shellfish
• Seeds such as pumpkin and sesame seeds
• Nuts
• Whole grains
• Legumes

It’s not just your gut that zinc helps. Read our guide to the benefits of zinc and why it matters for your health for more information.

Dietary variety matters

While individual nutrients play specific roles, digestive health reflects consistent dietary habits over time.

Eating a wide range of plant foods, whole grains, and nutrient-rich ingredients can help provide many of the nutrients associated with gut health.

Daily routines, eating habits, and lifestyle factors can influence how consistently these foods appear in your diet. For some people, maintaining this level of dietary variety every day can be challenging.

In these situations, some individuals consider supplements as a way to complement their diet rather than replace whole foods.

Getting a well-rounded, nutritionally balanced diet isn’t just good for your gut. Discover the essential nutrients for muscle growth.

Can Supplements Support Gut Health?

A balanced, varied diet provides many of the nutrients associated with digestive health. Fibre, plant compounds, and other nutrients that interact with the gut microbiome are naturally found in foods such as fruits, vegetables, whole grains, legumes, nuts, and fermented foods.

In practice, however, dietary patterns can vary. Busy routines, seasonal eating habits, and personal food preferences may affect how consistently these foods appear in the diet.

Dietary supplements are designed to complement the diet, not replace whole foods or healthy lifestyle habits. For some people, supplements can provide an additional way to support regular nutrient intake as part of a broader nutrition routine.

For example, certain supplements may contain ingredients such as vitamins, minerals, fibre, or beneficial bacteria that are also found in foods associated with digestive health. These nutrients contribute to normal physiological processes in the body and may help support overall nutritional intake.

At the same time, supplements should be approached with realistic expectations. No supplement can replace the benefits of a balanced diet, adequate sleep, physical activity, and other lifestyle habits that influence digestive wellbeing.

Digestive health reflects the interaction of many factors over time. For most people, a consistent approach that prioritises dietary variety and healthy lifestyle habits remains the foundation of gut health.

How AG1 Fits into a Gut-Supporting Routine

Supporting digestive health often involves a combination of consistent dietary habits and broader lifestyle factors. As explored throughout this guide, gut health is influenced by many nutrients that interact with the digestive system and the microorganisms living in the gut.

Our scientists designed AG1 as a dietary supplement to complement a healthy, varied diet, providing a broad range of vitamins, minerals, and other nutrients in one daily serving.

AG1 contains a variety of ingredients that commonly appear in diets associated with digestive health. These include nutrients such as magnesium and zinc, which contribute to normal physiological processes in the body, including normal macronutrient metabolism and other metabolic functions.

Alongside its vitamin and mineral content, AG1 also contains plant compounds, fibre sources, and probiotic cultures, which are commonly found in foods associated with digestive health.

Explore the full range of AG1 ingredients.

Rather than focusing on a single nutrient, AG1 takes a multi-nutrient approach, reflecting the fact that digestion and nutrient metabolism involve many interacting systems within the body.

AG1 is clinically researched, too – studies on our formula have examined factors such as nutrient absorption, nutrient status, microbiome composition, and gastrointestinal tolerability.a-d As with all dietary supplements, individual responses may vary, and these studies should be interpreted carefully.

AG1 is not designed to replace a balanced diet or healthy lifestyle. Instead, it can be used as part of a routine that includes nutrient-rich foods, regular physical activity, adequate sleep, and other habits that support overall well-being.

For those looking for a convenient way to complement their daily nutrition with a range of vitamins, minerals, and other ingredients, AG1 offers a simple addition to a broader approach to health and nutrition. Discover why it’s more than just a greens powder in our guide: What is AG1?