Low Energy (Mental & Physical): what it is and how we help

Low energy at a glance

Feeling physically drained or mentally flat most of the time is one of the most common reasons people seek help. Low energy usually has several contributing causes rather than one: sleep, stress, diet, activity levels and sometimes a medical issue such as low iron or an underactive thyroid. Finding the drivers is the way to lift it.

Signs of low energy

• Tiredness that does not improve with rest
• Brain fog and poor concentration
• Low motivation and flat mood
• Afternoon slumps and reliance on caffeine or sugar
• Reduced stamina for exercise

What causes low energy?

Common causes include poor or short sleep, stress and burnout, low iron, low vitamin B12 or D, thyroid problems, blood sugar swings, dehydration, inactivity, depression and recovering from illness. Medications and alcohol can also contribute.

How is low energy investigated?

A GP or blood test can check for anaemia, thyroid function, vitamin levels, blood sugar and inflammation. If tests are normal, lifestyle factors are usually the main lever.

How we help in Chiswick

• Blood tests: Randox panels covering iron, B12, vitamin D, thyroid and blood sugar.
• VedaPulse: heart rate variability to show stress load and recovery.
• Fitness and nutrition: a structured plan that rebuilds stamina gradually.
• Ayurveda: routine, diet and digestion guidance.
• Red light therapy: many patients use NovoTHOR sessions for recovery and wellbeing; evidence for energy specifically is limited.
• Acupuncture: often used for fatigue linked to stress and poor sleep.

What does the evidence say?

Correcting a deficiency such as low iron makes a clear difference. Regular exercise improves energy levels in most people, even those who feel too tired to start.

Physical or mental tiredness?

Physical tiredness shows up as heavy limbs, low stamina and needing to rest after activity. Mental tiredness shows up as brain fog, poor focus, low motivation and irritability. Many people have both, and they feed each other: poor sleep and stress drain mental energy, while inactivity lowers physical stamina. Working out which is dominant helps decide where to start.

Food and habits that affect energy

Large meals high in refined carbohydrates can cause an energy dip an hour or two later, while meals with protein, fibre and healthy fats give steadier energy. Dehydration, skipping breakfast, relying on caffeine and drinking alcohol, even moderately, all lower energy for many people. Iron-rich foods, oily fish and plenty of vegetables support energy over time.

Can low energy be a sign of something serious?

Most low energy has everyday causes, but it can be an early sign of anaemia, an underactive thyroid, diabetes, coeliac disease or depression, and less commonly other illness. Tiredness with weight loss, night sweats, breathlessness, heavy bleeding or a change in bowel habit needs a GP review.

What to expect at Omnia

We talk through your energy across the day, sleep, stress, diet, activity and health history, and arrange a Randox blood panel and VedaPulse stress check if helpful. Your plan targets what we find, whether that is nutrition, sleep, stress or building stamina, and we review progress after a few weeks. If any result needs a doctor, take your report to your GP.

What you can do at home

• Keep regular sleep and wake times
• Eat protein and fibre at breakfast
• Take a daily walk in daylight
• Cut back on alcohol and late caffeine

Blood tests that can help

Blood tests can look for treatable causes of low energy, such as low iron, thyroid problems or low B12. Our Tired All The Time (£159) panel covers the common ones. See also our guides to blood tests for anaemia and TSH levels. Blood tests are taken at our Chiswick clinic, with no GP referral, and you receive a clear results report, with a GP review available at an additional cost if you would like one. See every blood test and price.

Related: fatigue and ME/CFS. Omnia Lifestyle, Chiswick W4. Book online or call 020 4515 0000.