Lipids, including cholesterol, are essential for the production of hormones and vitamin D. But high cholesterol levels are linked to an increased risk of heart disease and stroke.

HbA1c (glycated haemoglobin) measures your average blood sugar over the past 3 months, which is a good indicator for the risk of developing pre-diabetes and diabetes.

Your liver has over 500 functions — like detoxifying your blood and absorbing nutrients. Poor liver health puts you at risk of chronic disease (like heart disease), weight gain and low energy.

Vitamin D helps your body absorb calcium. If you don’t get enough vitamin D you might feel depressed, tired, get sick often, have weak bones and muscle pain.

Iron is an important part of haemoglobin, which carries oxygen around your body. Low iron levels can cause tiredness, shortness of breath, head pain, and heart palpitations.

Vitamin B12 is essential for a healthy nervous system. If you’re deficient it can cause tiredness, pins and needles, heart palpitations, shortness of breath, and muscle weakness.

Folate (vitamin B9) is needed for healthy skin, hair, and eyes. If you’re deficient it can cause tiredness, pins and needles, heart palpitations, shortness of breath and muscle weakness.