HOW YOUR SKIN REFLECTS HOW YOUR GUT ARE
Death begins in your intestine (Japanese Proverb)
Your skin speaks for your gut: how your microbiota influences allergies, mood and ageing When a child takes an antibiotic, not only does the bacterium causing the infection disappear: millions of good bacteria also die. These bacteria, called microbiota, live in the gut, skin, mouth or lungs, and are teachers that train the immune system to recognise what is dangerous and what is not. When these “teachers” are lost, the immune system becomes confused and overreacts: allergies, intolerances or autoimmune diseases appear.
Your skin speaks for your gut: how your microbiota affects allergies, mood and ageing
When a child takes an antibiotic, not only does the bacteria causing the infection disappear, but millions of good bacteria also die. These bacteria, called microbiota, live in the gut, skin, mouth or lungs, and are teachers that train the immune system to recognise what is dangerous and what is not. When these ‘teachers’ are lost, the immune system becomes confused and overreacts: allergies, intolerances or autoimmune diseases appear.
Skin and the gut: a direct connection
Although they may seem like distant organs, the skin and gut are deeply connected. When the gut is inflamed or its microbiota is damaged, the skin reflects it: acne, dermatitis, rosacea or hair loss can be signs that something internal is not right. The skin acts as a mirror of the body, showing hormonal, digestive or immune imbalances. Furthermore, this relationship is two-way: poorly cared for or damaged skin (for example, with very alkaline soaps) can also generate biological stress and alter internal balance.
How everything starts
Microbial education begins before birth. The mother’s microbiota influences that of the baby during pregnancy, delivery and breastfeeding. If the birth is by caesarean or there is early use of antibiotics, the baby receives fewer protective bacteria. Then, if breastfeeding is short or the diet is ultra-processed, the cycle of imbalance continues. The result: children more prone to allergies, intolerances and weakened immune defences..
Food: the language of your microbes
Our modern diet has changed radically. Chemical fertilisers, pesticides, monocultures and ultra-processed products have modified nutrients and altered the microbiota. Even staple foods like milk or wheat are not the same as a century ago: some modern proteins and gluten can cause more inflammation. That is why many people tolerate European artisanal bread better than industrial bread. In short: we are what we absorb, not just what we eat. And that depends on who lives in our gut.
Stress, sun and lifestyle
Stress changes the microbiota within minutes, affecting the natural production of neurotransmitters such as serotonin. That is why taking care of the gut also improves mood and reduces anxiety. Moderate sunlight is beneficial: it activates genes that repair cells and strengthen immunity, provided the exposure is sensible. And strength exercise has become one of the best “natural medicines”: the muscle acts as an organ that communicates and balances hormones, inflammation and energy.
Retrain the body instead of banning
The focus should not be ‘never drink milk’ or ‘avoid seafood forever’. The goal is to re-educate the immune system and the microbiota to tolerate foods again. This is achieved through natural nutrition, physical movement, good quality sleep and, in some cases, personalised supplements.
Aging well is posible
Healthy ageing does not depend solely on creams or cosmetic surgery, but on keeping the internal biology strong and nourished. As a principle of functional medicine says: die young as late as possible. With sustained habits —living nutrition, contact with nature, exercise and less stress— it is possible to regain energy, improve the skin and balance the body inside and out.
In summary: The skin is not just an external barrier, but an open window to what is happening inside. Feed your microbes, take care of your gut and your skin will thank you.