Fatigue is a sustained lack of physical or mental energy that is not always corrected by rest. It is different from the ordinary tiredness expected after a demanding day. Causes range from insufficient sleep, stress and caring responsibilities to anaemia, diabetes, thyroid disease, infection, depression, sleep apnoea and medicine side effects.
Recognising serious symptoms
See a GP when fatigue has lasted several weeks, affects daily life or is accompanied by weight loss, mood change, excessive thirst, frequent urination, breathlessness, palpitations or gasping during sleep. Assessment may include blood tests for anaemia, diabetes or thyroid problems. Treatment depends on the cause.
Rebuilding a workable routine
Aim for consistent sleeping and waking times and a bedroom that is dark, quiet and comfortably cool. Reduce caffeine late in the day and avoid relying on alcohol for sleep. Screens, heavy meals and strenuous exercise immediately before bed can make sleep more difficult.
Regular activity can improve energy and sleep, but progression should be gradual. People whose symptoms worsen markedly after exertion need clinical assessment rather than a generic instruction to exercise more. Pacing can help balance essential activity, rest and recovery.
Food and energy
Regular meals containing protein, fibre-rich carbohydrate and unsaturated fat can provide steadier energy than repeated sugary snacks. Examples include porridge with yoghurt and seeds, eggs with wholegrain toast, or beans and vegetables with rice. Hydration matters, but forcing excessive water is unnecessary.
Fatigue should not automatically be attributed to “adrenal fatigue,” which is not a recognised medical diagnosis. Nor should iodine-rich kelp be used casually for thyroid support: too much iodine can worsen thyroid dysfunction. Iron should only be taken when deficiency is confirmed or clinically suspected and monitored. Some anaemias are not caused by iron deficiency.
Useful supplements
Supplements should be selected for the individual rather than used automatically. Product directions and advice from an appropriately qualified professional should take precedence over general information.
| Supplement | Effects |
|---|---|
| Krill oil or marine fish oil | Intended to support normal cellular function. |
| Ribose | Provides a sugar used in the production of ATP, the energy-carrying molecule in cells. |
| Coenzyme Q10 (ubiquinol) | Supports mitochondrial processes involved in ATP production. |
| Magnesium citrate | Supports the structure and production of ATP; low magnesium status can contribute to fatigue. |
| B vitamins and folate | Support metabolic pathways that convert food into usable cellular energy. |
| Vitamin C | Supports normal immune function and is described as being needed in greater amounts during stress. |
| Iron gluconate | Supports haemoglobin production when iron-deficiency anaemia is present. |
| Vitamin B5 | Included in the source to support the adrenal glands. |
| Spirulina powder | Provides trace minerals and is described as having alkalising properties. |
| Iodine or kelp | Included in the source to support thyroid function. |
These effects preserve the original rationale but do not establish that the supplements treat unexplained fatigue. Ribose, CoQ10 and magnesium do not correct sleep loss, depression or an untreated medical condition. Iron can be toxic when it is not needed, while kelp products can contain unpredictable iodine amounts. CoQ10 and fish oils may interact with medicines.
Persistent fatigue is a signal to investigate, not a diagnosis to cover with stimulants. The strongest approach combines appropriate medical assessment with regular sleep, manageable movement, adequate food and correction of demonstrated deficiencies.
Looking for personalised nutrition and lifestyle support? An FNTP member may be able to help you explore an approach suited to your individual needs. Find an FNTP practitioner.
This article is for general education and does not replace individual medical advice, diagnosis or treatment.
