Researchers at Oxford University are saying that if we do not take enough Vitamin D then we are at risk of serious diseases like MS, Lupus, Crohn's Disease, Type 1 diabetes, Rheumatoid arthritis and even Dementia.
The so-called sunshine vitamin, which you can get from food or from the sun, plays a key role in boosting the immune system.
They say that a significant number of people worldwide have a Vitamin D deficiency and with people spending most of the day inside, they are not getting enough from the sun. We need Vitamin D to activate our immune defences and without sufficient intake of the vitamin, our bodies will not be able to react and fight of serious infections in the body.
The trouble is too much sun can give you skin cancer and too little can give you Vitamin D deficiency. Researchers have known for a long time how crucial Vitamin D is for actually activating the immune system. But, more isn't necessarily better as taking mega-doses can cause nausea, weight loss and diarrhoea and they are saying that you must 'always' check with your GP before taking any supplements.
You can also get Vitamin D from fish liver oil, eggs and fatty fish such as salmon, herring and mackerel.