From the blog
Mitochondrial Function Test in India: What It Can and Cannot Show
In short: No single routine blood or urine test gives a complete picture of mitochondrial function throughout your body. Mitochondria are the parts of a cell that turn food and oxygen into usable energy. Lactate, pyruvate and organic acids give indirect clues, but each has limits and other possible causes. Direct methods are mostly used in research or specialist care. A doctor reads such results alongside your symptoms and other tests.
What do mitochondria do?
Mitochondria are tiny structures inside your cells that produce most of the energy the cell can use. They use oxygen to turn food into ATP, the cell's energy currency.
Energy is not their only job. They differ from one cell type to another, so mitochondria in muscle, blood and brain are not identical. This matters for testing, because a blood sample cannot show everything happening in muscle.
How do you test mitochondrial function?
You test it indirectly in everyday care, using blood and urine markers that reflect energy metabolism, and directly only with specialist or research methods. These markers show a downstream effect. None of them looks at a mitochondrion at work.
"Mitochondrial function" is also not one thing. It covers how many mitochondria a cell has, how well they use oxygen, and how they respond to demand. One number cannot sum this up.
What do blood and urine markers show?
Lactate. Lactate is formed from pyruvate, a product of sugar breakdown, during normal glucose metabolism, even when oxygen is available. Its concentration reflects both production and clearance. A clearly high level, above 3 mmol/L in a properly collected sample, can suggest mitochondrial dysfunction. But it also rises with low blood flow, some toxins and other diseases. Collection matters too: a tourniquet left on too long can falsely raise it.
Pyruvate and the lactate/pyruvate ratio. Pyruvate is usually measured alongside lactate. The ratio helps only when lactate is already high.
Organic acids in urine. Organic acids are small waste products of metabolism. A urine test can pick up certain patterns. A 2024 review of mitochondrial biomarkers describes urine organic acids as of limited use as a diagnostic marker.
Amino acids and acylcarnitines. These blood tests are also part of specialist evaluation, and they show how the body is handling proteins and fats.
GDF-15 and FGF-21. These are stress signals released into the blood. In the 2024 review, they appeared most useful among the markers compared in people with mitochondrial disease, "though they are still not perfect".
A normal result does not exclude a problem. Among people with proven inherited mitochondrial disease, one consensus statement reports that lactate was truly raised in only 34 to 62 percent. These figures come from that disease, not from people with everyday tiredness.
What methods are used mainly in research?
Specialist and research methods examine different aspects of mitochondrial biology; they do not all directly measure energy production. Most are used in research centres or specialist care, not in routine health checks.
Respirometry. This measures oxygen use by living cells or tissue. Researchers have proposed a single score from blood cells, called the Bioenergetic Health Index. It was put forward as a hypothesis for future clinical use.
Phosphorus magnetic resonance spectroscopy (31P-MRS). This MRI-type scan follows energy compounds in muscle during exercise and recovery. A 2024 review notes that exercise MR is not yet part of most clinical workflows.
Mitochondrial DNA copy number. This counts copies of the mitochondria's own DNA. Copy number measures DNA abundance, not mitochondrial energy-producing capacity. A raised count is non-specific. It can even be a by-product of regular, intense exercise.
Muscle biopsy. Enzyme testing on a tissue sample is used in specialist evaluation. It is an invasive test, used when a doctor has a specific reason.
What are the limits of mitochondrial tests?
The main limit is that these tests give clues, not a verdict. Keep these points in mind:
Other causes are common. Lactate and related markers change with illness, blood flow and how the sample was taken.
Blood is not muscle. Findings can differ between tissues.
Reference ranges vary. Most markers were studied in people with diagnosed disease, not in healthy adults.
Commercial panels are not a diagnosis. A home or mail-order organic acid report may label results as "mitochondrial markers". A pattern on such a report does not establish a mitochondrial problem by itself.
Tiredness has many causes. Thyroid problems, anaemia, low vitamin levels, poor sleep, low mood and medicines all need checking first.
How is this different from inherited mitochondrial disease?
Inherited mitochondrial disease is a separate medical condition, and it belongs with a specialist. It is a group of genetic disorders that can appear at any age and can affect many organs at once.
Diagnosis takes a detailed evaluation by a geneticist, neurologist or metabolic specialist. This uses blood and tissue tests, brain imaging and DNA analysis. Genetic testing is central, and a routine panel cannot make or exclude this diagnosis.
If several organs are affected, or similar problems run in your family, ask your doctor about a referral. This guide is about everyday cellular energy, not about this disease.
How can you improve mitochondrial function?
Regular exercise has the strongest support as an everyday way to look after mitochondria. Other everyday habits help create the conditions they need.
Move regularly. A 2021 review calls exercise the most potent behavioural approach for mitochondrial health. A single bout of exercise signals muscle cells to build new mitochondria and clear out worn ones. Long periods of disuse work the other way.
Protect your sleep. In one study, 24 healthy young men were divided into three groups. Five nights of only 4 hours in bed lowered mitochondrial respiratory function in muscle. This fall was not seen in the group who also did three high-intensity exercise sessions. Exercise is not a replacement for sleep; this was one short study.
Eat enough, and eat well. Mitochondria run on the food and oxygen you supply. They also need nutrients such as iron and B vitamins. A doctor can check for a deficiency before you take a supplement.
Be careful with "mitochondrial support" products. Supplements vary in content. Show your doctor anything you take, because some can interact with medicines.
How does a SOMA doctor decide which tests you need?
At SOMA, a doctor selects tests from your history and symptoms. Mitochondrial & metabolic assessment is part of the SOMA Method's testing stage. This assessment forms part of the doctor's evaluation of energy metabolism. What it can establish depends on the tests selected and the clinical context; persistent fatigue or normal routine results alone do not establish mitochondrial dysfunction.
Your doctor reads these results alongside your blood chemistry, hormones and history, as one picture. You will be told which tests make sense for you, and which do not. What to expect describes the first consultation. The longevity and healthy ageing page explains how results are tracked over time.
SOMA centres in Mumbai and New Delhi
SOMA doctors see patients at two centres:
Mumbai: A-507, Kohinoor Square, N.C. Kelkar Marg, Shivaji Park, Dadar West, Mumbai 400028. Phone +91 98671 94033.
New Delhi: E-354, Greater Kailash II, New Delhi 110048, serving Delhi NCR and Gurugram. Phone +91 87969 92001. More about the New Delhi centre.
The New Delhi centre is independently operated under licence from SOMA Longevity Sciences, and its own doctors lead care there. Both centres follow the same SOMA assessment and diagnostic standards. Online consultations are also available. Contact either centre.
Questions people ask
Is there a blood test for mitochondrial function?
No single routine blood or urine test gives a complete picture of mitochondrial function throughout your body. Lactate, pyruvate and related markers give indirect clues about energy metabolism, and each has other possible causes. A doctor reads them alongside your symptoms and other results.
Can a urine organic acid test diagnose a mitochondrial problem?
Not by itself. Urine organic acids can show certain patterns, but a 2024 review describes them as of limited use as a diagnostic marker. They are one clue among several.
What does high lactate mean?
High lactate means cells are producing more lactate than the body is clearing. Mitochondrial dysfunction is one possible cause. Others include low blood flow, toxins, other diseases and sampling problems, such as a tourniquet left on too long.
How can I improve my mitochondrial function naturally?
Regular exercise has the strongest support. Enough sleep and a nourishing diet also matter. A doctor can check for causes of tiredness and for nutrient deficiencies before you take supplements.
Where can I get a mitochondrial function test in Mumbai or Delhi?
Start with a doctor who can decide which tests fit your symptoms. Mitochondrial and metabolic assessment is part of SOMA's testing, with centres in Dadar West, Mumbai and Greater Kailash II, New Delhi. Suspected inherited disease needs a specialist.
Related guides
Sources
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This article is for education and general information. It is not a substitute for a medical consultation, diagnosis or treatment. Results vary by individual biology.
Wondering what your own results would show? Start with a conversation.