Dark Matter: The New Science of the Microbiome

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The final frontier for gut microbiome exploration is its relationship with our brains, something the new fields of nutritional psychiatry and psychobiotics are digging into. We already know the gut has its own nervous system, the enteric nervous system, and contains 100m neurons. We also know the gut-brain axis, via the vagus nerve, shoots neurotransmitters produced within the gut around the body and to the brain, which is why Cryan’s lab has studied the impact of particular bacteria on sleep and how certain types of fibre can improve complex cognitive processes. Eat more omega 3 New research suggests a relationship between gut microbes, omega 3 and brain health Polyphenols are a naturally occurring antioxidant that helps produce good bacteria in the stomach. It also helps reduce inflammation in the gut. This magic chemical can be found in blueberries and vegetables such as aubergine, tomatoes, white potatoes and peppers. “It occurs in a lot of nightshade vegetables, so we have a lot of that,” he says. Spector’s 30-year-long study of 15,000 twins, TwinsUK, and his PREDICT studies have shown that even genetically identical people respond to the same foods very differently (our microbiomes are so variable that twins share only 30% of the same gut microbes). By feeding participants the same meals on different days, he was able to show that responses to the same meals also vary hugely between individuals, influenced by both the microbiome and genetics. This matters, says the ZOE team, because our response to food is linked to our risk of heart disease, type 2 diabetes and obesity, but also because it blows apart the tired and useless mantra “calories in, calories out”, which doesn’t make sense in a world where two people’s blood glucose levels can be hugely different after eating the same slice of cake. How well do you know your gut? You may have seen the word probiotics on your food, or possibly seen recipes to help your gut health with the three K’s: Kombucha, Kefir and Kimchi. But if your life depended on it, would you eat someone else’s poo?

Unlocking the ‘gut microbiome’ – and its massive significance Unlocking the ‘gut microbiome’ – and its massive significance

In this mindblowing book, scientist and surgeon James Kinross explains how the organisms that live within us have helped us evolve, shaped our biology and defined the success of our species. But just as we have discovered this delicate and complex ecosystem within us, it is being irrevocably destroyed through antibiotic addition, industrial food production, the globalisation of our diets and lifestyles, and the destruction of our environment. A totally addictive and illuminating read. Compelling from beginning to end Dr Saliha Mahmood Ahmed, gastroenterologist and bestselling author of The Kitchen Prescription

I try to reduce the amount of meat that I eat. In fact, I almost never eat meat unless someone else is cooking,” he says. Instead, Dr Kinross focuses on eating a range of vegetables. “I try to have at least 30 different fruits and vegetables a week and I try to make sure that every meal I have is vegetable-based. We have a lot of salads in my house, and we love our polyphenols.”

Dark Matter: The New Science of the Microbiome : Kinross

In his new book Dark Matter: The New Science of the Microbiome, Dr James Kinross lays bare the mind-boggling world of what lies in our guts: the delicate ecosystem of trillions of microbial life forms that live within us all. Without us even realising, our gut’s unique ecosystem is the missing link in modern medicine and what’s more, is heavily influenced by our environment. This is a really nuanced and difficult thing to talk about, because of course, sometimes we have to take medicines,” says Dr Kinross. “I don’t want people to think that if your GP recommends antibiotics you shouldn’t take them.”I've long been interested in the microbiome, and have been eagerly awaiting a book that might uncover some of its mysteries. This is that book Heston Blumenthal Everything we’re doing now is scratching the surface,” says Spector. “We are maybe 10% of the way there, because every week, we’re discovering something new. Humans want an easy answer [to improve our gut health], but you shouldn’t take anyone seriously who doesn’t say it’s complicated,” he says. “There’s a massive industry that needs a simple message to sell its products. They want to say all you’ve got to do is eat this bar, this yoghurt or this protein drink.” More than half a century later, the Dutch gastro- enterologist Josbert Keller and his team at the Amsterdam Medical Centre randomised patients with recurrent C diff into three groups. The first group received vancomycin, a wash-out of the colon using a strong laxative, and a faecal transplant. The second had vancomycin and the colonic wash-out, and the third just received vancomycin. The FMT group did so much better than the other two groups that the study had to be stopped early, as it was deemed unethical to continue.