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Sleep and gut health are often presented as two separate aspects of wellbeing. One concerns rest, energy and brain function, while the other is associated with digestion, immunity and nutrition. Research, however, suggests that the two systems interact through circadian rhythms, metabolic processes, immune signalling and the microbiome–gut–brain axis. This does not mean that poor sleep is caused by an “unhealthy gut” or that taking a probiotic can cure insomnia. Most of the available research identifies associations rather than clear cause-and-effect relationships, while many of the proposed biological mechanisms have been studied more extensively in animals than in humans. Understanding what the evidence actually shows can help distinguish promising scientific findings from exaggerated wellness claims. What do we mean by gut health? Gut health does not have a single, universally accepted medical definition. It generally refers to the ability of the gastrointestinal system to diges...
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A sudden muscle cramp can be intensely painful. The muscle tightens involuntarily, feels hard to the touch and may remain sore even after the contraction has subsided. When this happens, the first explanation many people hear is that they must be deficient in magnesium. The usual recommendation follows almost automatically: take a supplement, eat a banana or drink an electrolyte beverage. Magnesium is essential for normal nerve and muscle function, and a severe deficiency can indeed cause muscle cramps. However, the presence of a cramp does not prove that a magnesium deficiency exists. Cramps may result from muscle fatigue, excessive exertion, heat exposure, fluid and sodium loss, medication use, circulatory or neurological problems and several other medical conditions. The evidence also does not support the routine use of magnesium supplements for every type of cramp. A Cochrane systematic review found that magnesium was unlikely to provide a clinically meaningful benefit for common i...
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Extreme heat does not affect only older people or those living with chronic health conditions. Anyone can develop a heat-related illness when the body is exposed to high temperatures for too long, particularly when humidity, strenuous physical activity, dehydration or inadequate access to cooling make it harder to release heat. The Hellenic National Public Health Organization, EODY, stresses that everyone is vulnerable to the health effects of heat, although some groups face a significantly higher risk. Heat exhaustion and heatstroke may share symptoms such as headache, dizziness, nausea and an elevated body temperature, but they are not equally dangerous. Heat exhaustion is a warning that the body is struggling to cope, often because it has lost too much water and salt through sweating. Heatstroke, by contrast, is a life-threatening medical emergency in which the body can no longer regulate its temperature effectively and brain function may be affected. Recognising the difference matt...
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When plain water is enough, when electrolyte replacement may be useful and why drinking excessive amounts of water is not always harmless. Hot weather increases the body’s need for fluids because sweating is one of its main cooling mechanisms. As sweat evaporates from the skin, it removes heat, but it also carries away water and electrolytes. This has helped create the impression that every hot day requires an electrolyte drink. In reality, heat alone does not determine what someone needs to drink. The duration and intensity of exposure, the amount of sweat produced, physical activity, diet, health status and medication use all matter. For most healthy people going about ordinary daily activities and eating regular meals, water remains the appropriate first choice. Electrolyte replacement becomes more relevant when sweating is heavy and prolonged or when fluids and salts are being lost through illness. The aim is not to drink as much as possible. It is to replace losses without creatin...
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Οι διακοπές υποτίθεται ότι μας απομακρύνουν από την πίεση της καθημερινότητας, το πεπτικό σύστημα, όμως, δεν υποδέχεται πάντα με την ίδια ευκολία αυτή την αλλαγή. Ένας άνθρωπος που συνήθως έχει σταθερή λειτουργία του εντέρου μπορεί, μόλις ταξιδέψει, να περάσει αρκετές ημέρες χωρίς κένωση ή να εμφανίσει σκληρά κόπρανα, φούσκωμα και κοιλιακή δυσφορία. Η «δυσκοιλιότητα των διακοπών» ή «του ταξιδιώτη» δεν αποτελεί ξεχωριστή ιατρική διάγνωση. Περιγράφει μια προσωρινή μεταβολή των συνηθειών του εντέρου, η οποία συνδέεται με το ταξίδι και τις αλλαγές που το συνοδεύουν. Τα διαφορετικά ωράρια γευμάτων, οι άγνωστες τουαλέτες, οι πολύωρες μετακινήσεις, η μειωμένη πρόσληψη υγρών και φυτικών ινών και η αλλαγή στη σωματική δραστηριότητα μπορούν να λειτουργήσουν συνδυαστικά. Το National Institute of Diabetes and Digestive and Kidney Diseases αναφέρει ρητά το ταξίδι, την αλλαγή της καθημερινής ρουτίνας και της διατροφής, την αναβολή της κένωσης, την αφυδάτωση και την περιορισμένη φυσική δραστηριότητα ...
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Holidays are supposed to offer a break from everyday life, yet the digestive system does not always welcome the change. A person who is usually regular may suddenly go several days without a bowel movement, experience hard stools, bloating or discomfort shortly after travelling. “Holidays constipation” or “traveller’s constipation” is not a separate medical diagnosis. It describes a temporary change in bowel habits associated with travel and the disruption that often accompanies it. Different meal times, unfamiliar toilets, long journeys, lower fluid intake, less fibre and changes in physical activity can all contribute. The National Institute of Diabetes and Digestive and Kidney Diseases specifically identifies travel, changes in diet and routine, ignoring the urge to have a bowel movement, dehydration and insufficient activity as possible causes of constipation. For most people, the problem is short-lived and improves when a more familiar routine is restored. Persistent constipat...
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After swimming in the sea or a pool, or even after taking a shower, it is common for a small amount of water to remain trapped in the external ear canal. The ear may feel blocked, sounds may seem muffled or there may be a distinctive sensation of water moving when the head is tilted. In most cases, this is a temporary irritation that resolves once the water drains or evaporates. When moisture remains inside the ear canal, however, it can disrupt the skin’s protective environment and encourage microorganisms to grow. This can lead to otitis externa, commonly known as swimmer’s ear. The difference between simply trapped water and early inflammation is not always obvious at first. It is therefore important to recognise which symptoms require attention and which attempts to clean the ear may do more harm than good. Why does water become trapped in the ear? The external auditory canal is a narrow passage leading from the outer ear to the eardrum. It is not completely straight, so a smal...
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