Tiredness is very common in the 21st Century. Largely due to higher stress levels, frequent air travel and general all round busy lives. As well as eating to be sociable we also eat when we are tired - also known as comfort eating. We often don't eat when we get the natural feeling of hunger but this is when the body really needs fuel.

Basically digestion breaks down our food. Then nutrients and sugar (glucose) are released into the bloodstream and then onto the cells. Every nutrient is needed to make energy. Energy is made in cells and some nutrients play a more important role than others.

In the cells are mitochondria – these are our power stations – and they require glucose, fat and amino acids in order to create power.

The process of energy production is done via the Kreb's Cycle which is essentially the sequence of reactions that occur in living cells to generate energy during the process of aerobic respiration. Within this process the body requires many nutrients. If we focus on these, the chances of getting greater power increases.

Vitamins B1, B2, B3, C, magnesium, chromium and biotin are key nutrients that play a role at various stages in the Kreb’s Cycle.

Wholegrains, lentils, beans, fish, poultry, fresh fruit and vegetables, egg yolk, nuts, avocados, brown rice, quinoa and green leafy vegetables are all foods that help to provide these nutrients.

As well as some foods being great for energy there are also those that zap it and should be minimized or avoided - alcohol, caffeinated drinks, refined foods that have high sugar content, phosphoric acid from fizzy drink and processed foods can only make you tired in the long term.