you are prone to worry and negativity, as well as eating healthily and getting the mood-boosting effects of regular exercise (preferably in the fresh air), you should pay particular attention to the energy tips on pages 159–70.
Energy-draining medical conditions
For the great majority of people who suffer from low energy levels, diet and lifestyle factors are chiefly to blame. It is important to bear in mind, however, that many hidden diseases and disorders can also trigger fatigue.
Listed below are the conditions that are most commonly associated with low energy levels. If your fatigue interferes with the quality of your life for more than three weeks and can’t be explained by diet and lifestyle habits, you should see a doctor without delay. This is particularly important if you are suffering from additional symptoms such as night sweats, weight change, breathlessness, pale mucous membranes in the nose and mouth, blood in faeces or urine, swollen lymph glands, irregular or absent periods, or constant thirst.
Fatigue is a good enough reason for you to seek your doctor’s advice. Persistent fatigue should never be ignored in the hope that it will go away.
Iron-deficiency anaemia
Around 4 million women in the UK suffer from anaemia caused by lack of iron, but the syndrome may also occur in men.
Iron is essential to the formation of haemoglobin, the oxygen-carrying component of red blood cells. A nutritional deficiency of iron can lead to low blood haemoglobin levels and a reduced supply of oxygen to organs, tissues and cells. Inadequate oxygen supplies immediately inhibit your body’s energy production and can result in fatigue, apathy, irritability, a racing heart rate and shortness of breath. In other words, your body needs iron to produce red blood cells and carry oxygen around your body; without it you’ll feel lethargic no matter how much sleep you get.
If you suffer from tiredness and heavy periods, ask your doctor for a blood test to determine your iron levels. To reduce the risk of anaemia, make sure you eat a balanced diet with plenty of green vegetables. Don’t take iron supplements unless advised to by your doctor, as the best way to get your iron is from your diet.
Undiagnosed diabetes
According to the Healthcare Commission, thousands of people in the UK may be unaware that they have diabetes. This is partly to do with high-sugar diets, obesity and sedentary lifestyles. Diabetes occurs when the amount of glucose (sugar) in your blood is too high and your body is unable to convert it into energy because there is not enough insulin or the insulin produced isn’t working properly. The body then breaks down its stores of fat and protein to try to release more glucose, and the problem gets worse. This is why people with untreated diabetes can often feel tired and lose weight. Other symptoms include urinating often and extreme thirst.
To rule out diabetes, ask your doctor for a blood test. If the test is negative for diabetes then your tiredness might be caused by your blood sugar levels. Cravings for starchy, sweet or fatty foods can mean you have a blood sugar imbalance. To keep your blood sugar levels steady avoid sugar and refined, processed foods as well as juices, cigarettes and caffeine. Eat every 3 hours and load up on wholegrains, vegetables, legumes, nuts, seeds and foods that are as fresh, natural and as unprocessed as possible.
Underactive thyroid
Your thyroid works by producing the hormones which control metabolism and regulate energy levels. If your thyroid produces too little of these hormones, you feel tired. You might gain weight, your skin and hair will feel dry, and you may also feel depressed.
To rule out problems with your thyroid, ask your doctor for a thyroid test. If you have an underactive thyroid, he or she will prescribe medication to boost your hormone levels. You should also exercise regularly and eat a diet high in fruit, vegetables, fish and seaweed, while avoiding alcohol and cigarettes.
Food intolerances
One in 10 people in the UK has a food intolerance that can cause lethargy and irritability. Food intolerances trigger an immune response which uses up a huge amount of energy, and the most common food culprits are wheat, dairy products and sugar. So if your lunch was a cheese sandwich on wholewheat bread with a bar of chocolate, your body may be using up energy simply digesting your meal rather than converting it into energy.
If you suspect that you have a food intolerance, keep a food diary for a few weeks and see if there is a connection between your tiredness and a specific food. Common offenders are dairy products, soy, corn and gluten (found in wheat and other grains). Try eliminating the food that you suspect is making you feel tired and see if this makes a difference. Alternatively, you can ask your doctor to give you a blood test to check for food allergies.
Other common causes of fatigue
Sinusitis: An infection of the sinuses that is caused by irritation due to allergies, or by bacterial infection. Symptoms include stuffy nose, headache and fatigue, which are so similar to cold symptoms it can be hard to know what is going on. This perhaps explains why sinusitis is one of the most common causes of fatigue – millions of people suffer in silence.
PCOS (polycystic ovary syndrome): If you’re a woman and, despite eating healthily, you find that the weight is piling on, you may be suffering from PCOS, which can affect as many as 1 in 5 women. Fatigue and weight gain are symptoms of this under-diagnosed condition, in which the ovaries and sometimes the adrenal glands, for unknown reasons, pump out too much male hormone. Thinning hair, insulin resistance, excess facial hair, severe acne, irregular periods and impaired fertility are other symptoms. To rule out PCOS, make an appointment with your doctor and discuss the possibility of PCOS as a cause for your fatigue. If you are diagnosed with the condition, the good news is that, as with diabetes – and hypertension or high blood pressure – PCOS can be successfully managed with a low glycaemic diet and lifestyle changes. Patients may also be considered for treatment with a diabetes medicine called Metformin, especially if they’re overweight. It seems to reduce excess male hormones and balance blood sugar levels.
Hypertension: Recent research has linked sleep disorders and chronic tiredness to high blood pressure. Like diabetes, high blood pressure or hypertension is a silent disease, and you may not be aware that you have it. This is another reason why regular check-ups with your doctor or GP are advised.
Sleep apnoea: Sleep disorders such as sleep apnoea can seriously disrupt sleep and cause chronic fatigue during the day. A person with sleep apnoea has breathing problems when they are sleeping, and this can cause loud snoring and frequent night waking.
Chronic fatigue syndrome (CFS): CFS is a recognised medical condition that causes exhaustion and fatigue without any clear causal factors. There is no hard-and-fast test for this syndrome, but it is diagnosed ‘by exclusion’. This means that if doctors have tested for everything else without success, this is the only possibility left. Chronic fatigue is nonetheless a real condition. Although it is not directly treatable, it can be managed well enough to allow people to return to good health in time.
Depression: One of the most common symptoms of depression is fatigue. If your energy is low from a busy lifestyle, you’re generally going to recognise the value of what you are doing with your life,
