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Learn the proverbial saying 'You are what you eat' and how it evolved from a French lawyer's quote to a dietary slogan. Discover the sources, variations and controversies of this phrase and its relation to health and food.
22 janv. 2024 · Le documentaire "You Are What You Eat" compare les effets d'un régime végétalien et d'un régime omnivore sur des paires de jumeaux. Les jumeaux sont choisis pour leur similitude génétique et environnementale, mais aussi pour leurs différences.
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We depend on a special organ to digest the food we eat and you won’t find it in any anatomy textbook. It’s the ‘microbiome’ – a set of trillions of bacteria living inside your intestines that outnumber your own cells by ten to one. We depend on them. They wield genes that allow them to break down molecules in our food that we can’t digest ourselves. And we’re starting to realise that this secret society within our bowels has a membership roster that changes depending on what we eat.
These changes take place across both space and time. Different cultures around the world have starkly contrasting diets and their gut bacteria are different too. As we grow older, we eat increasingly diverse foods, from the milk of infancy to the complex menus of adulthood. As our palate changes, so do our gut bacteria.
It all starts from the moment we’re born, when we inherit our first microbiome from our mums – a zeroeth birthday present that give us the digestive abilities that we need from day one. These first colonists are laden with genes for digesting milk proteins, allowing babies to make full use of their only source of nourishment.
But breast milk isn’t just a meal for baby, but for baby’s first gut bacteria. After lactose and fat, the third most common ingredients in breast milk are small sugar molecules called ‘oligosaccharides’. Gut bacteria thrive on these and Angela Zivkovic from the University of California, Davis thinks that they evolved as part of breast milk, to selectively feed the right bacteria in a baby’s bowels.
Breast milk contains over 200 types of oligosaccharides. They’re part of a baby’s immune system by acting as decoys for disease-causing bacteria. They look like molecules on the surface of human cells, which infectious bacteria recognise and stick to. By presenting alternative targets, the oligosaccharides divert these bacteria away from actual cells.
But they also feed helpful bacteria just as they distract harmful ones. The bifidiobacteria, which are common in the guts of breast-fed infants, have a preference for milk oligosaccharides, and some species can survive on these molecules alone. So when mum suckles her infant, she’s looking after both her baby and its partners-in-digestion.
•PNAS http://dx.doi.org/10.1073/pnas.1000083107
•PNAS http://dx.doi.org/10.1073/pnas.1005963107
Your gut bacteria are influenced by what you eat and they influence your health and well-being. Learn how different diets, cultures and life events shape your microbiome and how it affects your digestion, immunity and more.
15 déc. 2023 · Learn the idiom 'You are what you eat' and how it relates to your health and diet. Find out its origin, usage, and alternative expressions in this article.
In this animation, we examine the phrase, "You are what you eat". It's a phrase used around the world and throughout history, but how much scientific truth i...
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Identical twins change their diets and lifestyles for eight weeks in a unique scientific experiment designed to explore how certain foods impact the body. Watch trailers & learn more.
Learn the meaning and origin of the idiom "you are what you eat", which means what you eat affects your health. Find out how to use this phrase in different contexts and hear it spoken.
