“Olive oil, which is widely used in the Mediterranean diet, helps reduce bowel inflammation,” he explained.

“Try it as a salad dressing or sprinkle some cooked veggies over it for a double whack, and all the veggies, beans, and lentils taste so much better.

“Prebiotic foods form the basis of a psychobiotic diet – a plant-based, high-fiber diet that is good for your brain, keeping your mood and anxiety in check.

“They act as ‘fertilizer’ for the good bacteria, stimulating them to multiply and over time counteracting the effects of more harmful bacteria.

“Leeks, onions, and garlic are prebiotics. Fermented foods like kefir, miso paste, kombucha and sauerkraut strengthen the good bacteria in the intestines, while fruits, vegetables and high-fiber whole foods nourish the intestinal microbiome and allow it to thrive. “