How 30 plants a week could revolutionize your gut health

Eating a wide range of plants each week could transform gut health, according to experts. The '30 plants per week' guideline encourages people to diversify their diet—from vegetables and fruits to spices and whole foods. Researchers say this approach strengthens the microbiome, the community of bacteria living in our digestive system.

The concept gained attention after Professor Tim Spector recommended consuming at least 30 different plants weekly. He argues that variety supports a healthier microbiome, which in turn affects digestion, immunity, and even taste preferences. Studies, including the American Gut Project, back this up, showing that diverse plant intake improves gut bacteria balance.

The rule is flexible—some experts suggest aiming for 40 or more plants. Even small amounts count: half a teaspoon of spice or a 'good handful' of vegetables, legumes, or whole foods contributes to the total. Processed plant-based foods, however, do not qualify.

Changing eating habits can also reshape taste preferences within six weeks. This happens because the microbiome adapts to new foods, making unfamiliar flavours more appealing over time. Cookbook authors like Melissa Hemsley and Katharina Seiser promote the idea, encouraging people to experiment with different potatoes, herbs, and grains to keep meals varied and gut-friendly.

The '30 plants a week' method offers a simple way to boost gut health through diet. By including a mix of fresh, whole foods—even in small quantities—people can nurture a more diverse microbiome. Over time, this shift may lead to better digestion and a broader range of enjoyed flavours.