Potassium also plays a key role in maintaining normal levels of fluid within the cells, as well as offering other benefits.

Keeling explains: “Potassium works alongside sodium to maintain fluid balance while supporting muscle and nerve function.”

Like sodium and chloride, you’ll find potassium in most sports drinks – but this isn’t the only way to up the levels of potassium in your system.

“It’s important to consume potassium-rich foods such as fresh fruit and leafy greens each day to restore the electrolytes lost via sweating and urination – particularly in hot weather,” Stewart says. “Fruit also naturally contains lots of water, so it contributes to your daily water intake.”

Keeling recommends turning to bananas as your first port of call if you want to up your potassium intake. “You can also include spinach, avocado, tomatoes and sweet potatoes into your meals to up your intake,” she adds.

Worried about staying hydrated in the heat? Try focusing on these 5 key nutrients