Dehydration Signs and Plastic Bottle Water Risks Highlighted in Slovenia

Health experts in Slovenia warned that dark urine, headache, fatigue and reduced concentration are early indicators of dehydration, especially during hot summer months. Dr. Matej Gregorič of the National Institute of Public Health explained that adults need roughly 30–35 ml of fluid per kilogram of body weight, about two to three litres daily, with one‑third coming from food. The safest hydration source is plain water, followed by mineral water and unsweetened teas; foods high in water content such as cucumbers, tomatoes, watermelon and dairy also contribute.

During intense physical activity or heavy labor, electrolyte replacement with isotonic drinks may be required. The experts also cautioned against drinking water stored in plastic bottles that have been exposed to high temperatures, such as inside a parked car. Temperatures above 30 °C can cause plastic to release bisphenol A (BPA) and antimony, substances linked to hormonal disruption and potential cancer risk. The recommendation is to discard any bottled water that has been left in hot environments and to use fresh water instead.