Iron deficiency symptoms include pale skin, tiredness and shortness of breath.
The condition is caused by a lack of iron in the diet, which badly affects the red blood cells, leading to energy production problems in cells.
You can find out if you have enough iron in your body by taking a simple blood test with your GP.
Untreated iron deficiency can make you more at risk of illness, infection and heart failure.
You should eat more “dark-green leafy vegetables” according to the national healthcare provider, such as kale.
Kale, which sells for £1 in most UK supermarkets, contains as much as 1.5mg of iron for every 100 grams, according to the United States Department of Agriculture, or USDA.
Watercress, on the other hand, which the NHS also recommends contains an estimated 0.2mg of iron for every 100 grams.
Other foods you could eat to reduce your risk of developing an iron deficiency include cereals and bread with extra iron, and meat.
You could also eat more pulses, such as beans, peas and lentils, to raise your iron dietary intake.
Healthline, based in the US, also recommends consuming more livers, seafood and, nuts and seeds, to raise your bodies iron content.
“Many people shy away from organ meats, but they’re a great source of iron,” it says on its website.
“Liver is arguably the most popular organ meat. It’s rich in iron and folate.
“Some other iron-rich meats are heart, kidney, and beef tongue.”
100 grams of liver contains almost twelve times the amount of iron in kale, according to the USDA. For every 100 grams, it has 17.9mg of the substance.
Another mineral important for healthy functioning of the body is calcium.
Calcium deficiency, also known as hypocalcemia, may not cause any symptoms at first, but as the condition develops, signs may begin to show.
Severe symptoms of hypocalcemia include confusion or memory loss and easy fracturing of the bones.
Calcium has several important functions, including helping build strong bones and teeth, regulating muscle contractions, including heartbeat, and making sure blood clots normally.
It is also important to get enough vitamin D as it helps regulate the amount of calcium in the body.