Electrolyte drinks are everywhere, but most healthy adults don't actually need them — even in a heatwave. GPs say water and a balanced diet are sufficient for the average person, unless you're sweating heavily, exercising intensely for over an hour, or recovering from illness. Those with kidney, heart, or blood pressure conditions should check with a doctor first.
Electrolyte replacement products are flooding supermarket shelves and social media feeds, but GPs are urging the public not to get swept up in the hype. For most healthy adults, plain water and a balanced diet provide all the sodium, potassium, and other minerals needed — even during hot weather. The key driver of electrolyte loss is sweating, and unless you're doing it excessively, there's no real need to supplement.
That said, certain groups can genuinely benefit. Athletes exercising intensely for more than an hour, outdoor manual workers sweating for prolonged periods, and people recovering from vomiting or diarrhoea illness may find electrolyte products helpful. On the flip side, people on low-salt diets due to blood pressure, kidney, or heart conditions should consult a doctor before reaching for these products.
Key Takeaways:
Why it matters: As heatwaves become more frequent in the UK, clear, evidence-based guidance helps patients and clinicians cut through wellness marketing noise and make informed hydration decisions.
