Potassium (K) is a cation, or positively charged mineral, required for many physiological functions: acid-base balance, osmotic balance, muscle contraction and carbo-hydrate and protein metabolism.

It helps regulate muscle and nerve function, supports a healthy immune system, keeps the heartbeat steady, and helps bones remain strong. And, no – we are not talking of calcium, sodium, or potassium.

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Interestingly, while the Monetary Policy Committee voted by a majority 7–2 to reduce base rate to 4.5 per cent, those two members opted for a deeper 0.5 percentage point cut to 4.25 per cent.