Marie Claire is supported by its audience. When you purchase through links on our site, we may earn commission on some of the items you choose to buy.
It’s known by scientists as the second brain for a reason.
We know, we know – gut health doesn’t exactly sound riveting, but trust us – it kind of is.
Scientists call it your second brain because it has the ability to affect everything from heart health, to weight gain and maintenance, to mental health. Cue our easy-to-digest, expert-led guide to gut health and happiness…
We bought you the simplest gut health hacks to boost your wellbeing: next up, your complete guide to gut health and what exactly scientists know about how important it can be. Keep scrolling for the expert’s take – and don’t miss their guides to what to eat after a workout and which foods boost mood, while you’re here.
Gut health: your expert-led guide
Unless you suffer from IBS, colitis, or Crohn’s disease, you probably don’t pay much attention to your gut – why would you? But FYI, the gut, or gastrointestinal tract – a tube that runs from the stomach to the bowel, via the intestines, forming the digestive system – is integral to our health.
“A weakened, damaged gut affects everything from our heart, brain, and immune system to our skin and how happy we feel,” says doctor Vincent Pedre, a New York-based physician and author of Happy Gut. “It can lead to so much more than bloating and food intolerances.”
Take a study from the University of Turku in Finland, for example, which found that eczema sufferers have slightly different gut bacteria to those who don’t have eczema. “The gut has a tissue layer that’s similar to that of skin, so if you’re experiencing imbalances in this layer, it will show on the skin’s surface,” adds nutritionist Henrietta Norton. “Similarly, if you’re not effectively absorbing the nutrients from your food because of low levels of beneficial bacteria in the gut, you may not be getting enough skin-nourishing vitamins.”
Put simply, your gut health can impact everything from your skin, to your digestion, to your mental clarity and wellbeing.
Gut health test: How do I know if I have a healthy gut?
Most of us don’t even realise what a healthy gut feels like, according to nutritionist Amelia Freer (Brit winner Sam Smith credits her with his two-stone weight loss). “Many people think it’s normal to wake up with a relatively flat stomach then gradually see and feel it expand throughout the day. But it’s not,” says Freer, author of Eat, Nourish, Glow. “A healthy gut means no daily bloating, gas, constipation, discomfort or tiredness after eating. You’ll also have better-quality sleep, more energy, and fewer mood swings.”
So, any of the below could be signs of an unhealthy gut:
- Daily bloating
- Daily gas
- Daily constipation
- Daily discomfort after eating
- Daily tiredness after eating
- Poor quality sleep
- Low energy
- Mood swings.
Similarly, an unhealthy gut can become “hyper-permeable” – or leaky, shares Pedre. “The gut sometimes becomes inflamed and mesh-like, so food particles get through to the bloodstream. Your body develops antibodies to fight them, and that’s where food intolerances come from,” he explains.
Gut health benefits: so, how does gut health work?
Fun fact: our body is home to 100 trillion bacteria, and most of them live in the gut. There, imagine a constant tug of war between good and bad. The build-up of bad bacteria, caused by toxins in the food we eat, is neutralised by the friendly bacteria to keep our immune system stable.
“Anything that alters this delicate balance – such as chronic stress, poor diet, hormonal contraceptives, and antibiotics – can inhibit digestion,” explains Freer. “This can cause bloating, discomfort, constipation, and diarrhea.”
Another culprit can be anti-inflammatory drugs, such as ibuprofen.
Gut health foods: what to eat
A key player your diet, explains Pedre – so eating the right foods is important. It’s not all leafy greens, leafy greens, leafy greens though – Doctor Simone Laubscher, founder of Rejuv Wellness, advises maintaining an 80/20 balance. “Try to eat more organic, whole foods where you can, but also enjoy the treats that are good for your soul, too,” she advises.
Similarly, fermented foods such as sauerkraut, miso soup, and kombucha tea are great for gut health. “Eating small amounts of fermented foods daily is good for your gut health because fermentation makes the food easier to break down, and this protects the good bacteria,” says nutritionist Vicki Edgson, author of Gut Gastronomy.
Great gut health foods include the following:
- Organic meat
- Organic fish
Gut health and mental health: can it impact my mood?
Bacteria don’t just dictate your digestive health, they’re crucial to your mood, too. There’s a reason why you feel butterflies in your stomach when you’re nervous or excited – it physically knots up in response to your emotions.
Did you know? The gut contains the second largest number of neuro cells, after the brain – hence the second brain thing. Inside your gut there’s a huge entity of bacteria that impacts your neuro cells, in turn influencing moods and emotional well-being.
One study from McMaster University in Canada even found that poor gut health equates to heightened anxiety and depression.
Gut health improvement: your guide
1. Eat balanced meals and snacks
‘The gut is full of serotonin, aka your happiness hormone, and carbs are the quickest way to feed it,” shares Pedre. “But this can result in an energy crash, so make sure you’re eating a balanced meal or snack of carb, fat and protein for longer-lasting energy levels,” he shares.
2. Drink more H2O
Sure, you’ve heard it before, but water really is the easiest and cheapest way to boost your gut health. Aim for two litres a day.
3. Try some yoga
Our guides to the types of yoga will come in handy here. While more research needs to be done on the matter, studies have found yoga may help relieve digestive issues. How? By decreasing stress, increasing circulation, and promoting gut motility, too.
4. Eat mindfully
Aka, chew thoroughly in order to slowly break food down. In turn, this will stimulate saliva production and aid digestion. “Fast stress-eating is bad for your gut,” says Edgson.
Try this: breathe rhythmically to slow your eating right down.
5. Up your fibre
A study from Stanford University found friendly gut bacteria thrive on dietary fibre, and a lack of it weakens the gut lining.
Try this: up your intake of fruit, veg, grains, nuts, and seeds.
6. Try probiotics
Probiotics help restore balance in your gut. “Good-quality ones will survive the acidic environment of our stomach,” explains Freer. Symprove was rated the most effective by UCL’s School of Pharmacy – read our Symprove review, here – or scroll our guide to the best probiotics for women.
Easier said than done.
Try this: for a walk at lunch rather than sitting at your desk.
8. Up those zzzzzs
Aim for six to eight hours of good quality sleep.