Vitamin D is essential for regulating the amount of calcium and phosphate in the body, which helps to prevent bone deformities.

if you are spending a lot of time indoors, the nhs suggests you should take 10 micrograms of vitamin d a day to keep your bones and muscles healthy.

Porter goes on to list the external factors that can contribute to lower vitamin D levels.

These can include mood changes, frequent colds and loss of appetite.

The chemical is essential for the absorption of calcium, so those who fail to sustain levels through exposure to the sun must turn to food.

READ MORE : Vitamin D deficiency : The sensation in the hands and feet warning that levels are low A prolonged deficiency can have dire health consequences, so the warning signs should never be ignored.

The health body states : "Vitamin D is a fat-soluble vitamin essential for strong bones.

Vitamin D deficiency is common in the UK (Image: Getty )

inadequate vitamin d can lead to osteoporosis, increased risk of falls, fractures and bone and muscle pain.

Could your body be showing signs of a deficiency?

Naturally present in very few foods, Medical News Today pointed out, a lack of strong sunlight usually means a person is not getting enough vitamin D. One of the warning signs of this nutritional deficiency is feeling fatigued throughout the day – no matter how much sleep you get.

"A level of 20 nanograms to 50 ng is considered adequate for healthy people.

Vitamin D deficiency: Are you lacking the sunshine vitamin? (Image: Getty)

Blood tests can be arranged by your doctor.

However, all adults in the UK should be taking vitamin D supplements during autumn and winter.

The doctor says that usually there are no symptoms of a vitamin D deficiency, and "if they are present the signs are often subtle".

Vitamin A can also reach toxic levels and can cause serious problems."

You cannot overdose on vitamin D through exposure to sunlight. (Image: GETTY)

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