He says: “Hydration is essential, but drinking 4 to 4.5 litres of plain water everyday isn’t suitable for everyone, and can actually interfere with your electrolyte balance, leading to cramping, nausea, or, in extreme cases, hyponatremia (dangerously low sodium levels).
Article source: https://www.huffingtonpost.co.uk/entry/tiktok-exercises-warning_uk_697c8bcae4b0c378a7e2f75e