Do you always feel tired? If a good night’s sleep doesn’t leave you feeling refreshed, you may be wasting valuable energy due to a vitamin deficiency. These are four vitamin deficiencies known to cause lethargy, and what you can eat to give your energy levels a much-needed boost.

Feeling tired no matter how long you rest can be a sign of an underlying disease or health condition.

The NHS defines fatigue as “when fatigue is often overwhelming and not relieved by sleep and rest”.

However, many health issues, including vitamin deficiencies, can leave you feeling exhausted.

If you suffer from fatigue, be sure to speak to your GP to rule out any serious health issues. They may also ask you about your diet to assess whether a vitamin deficiency could be making you lethargic.

Here are four common vitamin deficiencies that could make you sleepy.

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You may then be prescribed an iron tablet to increase your iron levels and you will be advised to eat more iron-rich foods.

Iron-rich foods include dark green leafy vegetables, grains with added iron, meat, and legumes like lentils.

Vitamin D deficiency

Your body naturally creates vitamin D from sunlight, but if you live in Britain during the winter months you may have noticed that sunshine is in short supply.

The NHS has recommended that anyone in the UK over the age of four take a vitamin D supplement between October and March, as daylight is not strong enough for our bodies to create enough vitamin D per himself.

If your vitamin D levels are low, you might notice symptoms including feeling extremely tired and even mood changes, such as feeling depressed.

Vitamin D deficiency can also weaken your bones over time, and deficiency is commonly associated with the development of rickets in children.

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Vitamin C deficiency

Some of the first signs of low vitamin C levels are fatigue and low mood.

These warning signs may appear before you have developed a total vitamin C deficiency, so you should not ignore them as you can prevent more serious symptoms by catching them early.

The NHS says you should be able to get all the necessary vitamin C from your diet, as long as you eat an adequate amount of fruit and vegetables.

Good sources of vitamin C include citrus fruits, bell peppers, strawberries, black currants, broccoli, Brussels sprouts and potatoes.