When the temperature drops, there's one food we all instinctively reach for: soup.

Whether it's a steaming bowl of pho after a long day, a creamy pumpkin soup on the couch, or a spicy ramen shared with friends, soup is one of winter's greatest comforts. But beyond warming you from the inside out, the right ingredients can also nourish something you might not think about very often—your microbiome.

The mouth is the gateway to human health and home to billions of bacteria. The goal isn't to eliminate them (despite what old-school mouthwash ads might have you believe), but to support a healthy balance of beneficial microbes that help protect your teeth, gums and overall wellbeing.

The good news? Many of the world's most-loved soups are naturally packed with fibre-rich vegetables, herbs, spices and fermented ingredients that your microbiome loves.

So if you're looking for an excuse to order the soup—or make a big pot at home—here are some of our winter favourites.

🍜 Pho: Vietnam's Ultimate Feel-Good Soup

There's a reason pho has become a winter staple around the world. An explosion of taste and fragrances. Pho is at it’s core a bone broth soup, before bone broth became hip and popular. Beef and or chicken bones simmering over low fire for 12 hours plus combined with warming spices like star anise, cinnamon, cloves and ginger creates a deeply comforting bowl that's then piled on with bean sprouts, fresh basil, coriander and lime for extra plant diversity—a key ingredient in supporting a thriving microbiome.

Why your mouth loves it:

• Fresh herbs provide plant compounds that support microbial diversity.

• The combination of spices like anise, cinnamon, cloves and ginger support gut health.

• Bean sprouts and vegetables add fibre that feeds beneficial bacteria.

🍥 Miso Soup: Small Bowl, Big Benefits

This Japanese classic soup is made with fermented miso paste (best to look for non-pasteurised miso paste), miso soup is one of the easiest ways to enjoy fermented foods. If the miso is stirred into warm (rather than boiling) broth, many of the beneficial compounds created during fermentation are better preserved.

Add tofu, enoki mushrooms, wakame seaweed and spring onions for a nourishing bowl that's light yet satisfying. No cooking, no mess and all the goodness.

🍲 Pumpkin Soup: A Winter Classic

Few soups feel more like winter than roasted pumpkin.

Naturally sweet and incredibly creamy when blended, pumpkin is full of fibre that helps nourish beneficial bacteria throughout your digestive system—including the microbes that call your mouth home.

Here at Keeko we have a twist to the classic pumpkin soup by adding, carrot, onions and a health dose of turmeric, fresh ginger and garlic, then top with toasted pumpkin seeds for crunch. Turmeric and garlic has been known to be anti-inflammatory and also helps with immunity.

🍜 Ramen (Done the Microbiome-Friendly Way)

Ramen doesn't have to be reserved for cheat days.

Build your own bowl with a rich broth, plenty of vegetables, mushrooms, leafy greens, soft-boiled eggs and tofu or lean protein.

Swap heavily processed instant noodles for fresh or wholegrain noodles when possible or get a veggie peeler and peel a zucchini for instant veggie noodles and don't shy away from adding extra greens.

Bonus points if you add fermented toppings like kimchi after serving.

🥣 Minestrone: Italy's Fibre Powerhouse

Minestrone is basically a celebration of plants.

Beans, tomatoes, celery, carrots, onions, zucchini and leafy greens all come together in one colourful bowl that's naturally rich in fibre.

The more plant variety you eat, the more diverse your microbiome tends to become—and diversity is exactly what beneficial bacteria love.

🍄 Wild Mushroom Soup

Earthy, rich and deeply comforting.

Mushrooms contain beta-glucans—naturally occurring fibres that support immune function—while onions, garlic and herbs help round out the microbiome-friendly ingredients.

For extra creaminess, add a tiny bit of sweet potatoes and cashews instead of heavy cream.

🥣 Build a Better Bowl

No matter which soup you're craving, a few simple additions can make it even more microbiome-friendly.

Try adding:

• Lentils or beans for extra fibre

• Garlic and onions for prebiotics

• Fresh herbs like parsley, coriander and basil

• Ginger, garlic and turmeric immunity boosters

• Mushrooms for added plant diversity

• Leafy greens such as spinach or kale (best blanched quickly)

• Seeds or nuts for crunch and healthy fats

• Fermented toppings like kimchi or a spoonful of yoghurt (added after cooking)

The more colourful and plant-rich your bowl, the happier your microbes are likely to be.

A Happy Microbiome Starts with Every Spoonful

Winter comfort food and oral wellness can absolutely go hand in hand.

From Vietnamese pho and Japanese miso to Italian minestrone and classic pumpkin soup (any ideas of the origin?). Every bowl is an opportunity to nourish the beneficial bacteria that help keep your mouth healthy.

At Keeko, we believe caring for your smile goes beyond brushing. It starts with the everyday choices you make—from the food you eat to the oral care products you use.

So this winter, embrace soup season. Your tastebuds, your body and your oral microbiome will all thank you.

And don’t forget to brush with our Superclean Natural Whitening Toothpaste and shine bright through the winter months.