This diversity is thought to be linked to good overall health and a number of health benefits, from smooth digestion to better mood.
So if you can really increase the diversity of your diet, it increases the diversity of the gut bacteria that are really helpful and protective," Gabrielle Morse, a gut health specialist and registered dietitian at The Gut Health Clinic, told Business Insider.
Vegetables are a good source of fiber, which is good for gut health, she said.
She eats fish because it's a good source of protein and omega-three fatty acids, which benefit heart health.
Dairy productsDairy products are a good source of protein, calcium, and, in many cases, healthy fats, Morse said.
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