Supplements have long been promoted on the market for a long list of health benefits, but with so many available, it can be daunting to choose one that will actually work for you. Thankfully, a GP has revealed one particular supplement that has numerous benefits , from getting a better nights sleep to controlling blood sugar levels. Magnesium supplements are widely available on the market, from your local high street pharmacy to online websites. But what are the benefits? Dr Grant, a Senior