Max 6g/day. Too much or too little both cause problems.
Too much → body retains water → raised blood pressure → strain on heart and arteries.
High salt intake increases risk of heart attack, heart failure, stroke, and vascular dementia.
UK maximum recommendation: no more than 6g of salt per day for adults.
Too little → hyponatraemia — nausea, confusion, muscle cramps, and in severe cases seizures.
Sodium is essential for fluid balance, nerve function, and muscle contraction including the heart.
Risk groups for low sodium: endurance athletes, older people, those on diuretics.
Balance essential