Press release —
Fatigue, Hair Changes and Weight Fluctuations: London Blood Tests Highlights the Role of Thyroid Testing
London Blood Tests is encouraging people experiencing persistent, unexplained symptoms to consider whether thyroid function should form part of a wider health assessment.
LONDON, UK — August 2026 — Persistent tiredness, changes in weight, hair thinning, difficulty concentrating and sensitivity to temperature are symptoms many people experience at some point. While they can have numerous causes, they can also occur when the thyroid gland is not functioning normally.
London Blood Tests is highlighting the importance of looking at symptoms in context and using appropriate laboratory testing where thyroid dysfunction is suspected.
The thyroid is a small gland in the neck that produces hormones involved in regulating metabolism and a wide range of bodily functions. Both an underactive thyroid and an overactive thyroid can produce symptoms that overlap with other health concerns.
For example, the NHS lists fatigue, weight changes and hair changes among the possible symptoms associated with thyroid dysfunction, although these symptoms are not specific to thyroid disease.
This overlap is one reason why symptoms alone cannot determine whether the thyroid is responsible.
“Someone who feels exhausted, notices changes in their hair or is struggling with unexplained changes in weight may understandably start looking for a cause,” said Gabriela Brewer, Founder of London Blood Tests.
“But there are many possible explanations for these symptoms. Blood testing provides objective information that can help establish whether thyroid function is one of the areas that needs further attention.”
Looking Beyond a Single Thyroid Marker
Thyroid Stimulating Hormone, or TSH, is commonly used when thyroid dysfunction is being investigated. NICE recommends TSH as an initial test for many adults where pituitary disease is not suspected, with Free T4 and Free T3 measured in particular circumstances depending on the TSH result.
For patients looking for a wider assessment, London Blood Tests offers a Thyroid Full Profile covering six thyroid-related biomarkers.
The profile includes:
- Thyroid Stimulating Hormone (TSH)
- Free T3
- Free T4
- Thyroxine (T4)
- Thyroid Peroxidase Antibodies (TPOAb)
- Anti-Thyroglobulin Antibodies (TgAb)
This combines thyroid hormone measurements with thyroid antibody testing in a single profile.
Thyroid antibodies can provide additional information in certain clinical circumstances. NICE, for example, recommends considering TPO antibody measurement in adults whose TSH is above the reference range when investigating the underlying cause of hypothyroidism.
Private Thyroid Testing Across London
London Blood Tests provides private blood testing in London through multiple collection locations across the capital, allowing patients to choose a convenient location rather than relying on one central clinic.
Mobile phlebotomy can also be arranged for patients who prefer to have their blood sample collected at home or another suitable location.
The company advises patients not to interpret an individual abnormal marker in isolation. Laboratory results need to be considered alongside symptoms, medical history and other relevant clinical information.
Patients who would like medical support following their results can also arrange a private GP consultation for further discussion.
“Private testing can give people faster access to information about their health, but the purpose should always be to obtain meaningful laboratory data rather than simply ordering as many tests as possible,” Brewer added.
“Choosing the appropriate profile and understanding what the results mean is much more valuable.”
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About London Blood Tests
London Blood Tests is a private blood testing and preventative health platform providing access to routine blood tests, advanced diagnostic panels, longevity assessments and specialist health screening across London and the UK.
The service is designed for patients who want faster, more accessible insight into their health without long waiting times. London Blood Tests works through a network of partner clinics and accredited laboratory providers, offering blood testing for general health, hormones, fertility, vitamins and minerals, allergy and immunity, organ function, sexual health, genetics, environmental exposure, peptide monitoring and longevity-focused health optimisation.
Patients can book clinic appointments or arrange home and hotel phlebotomy, with results delivered securely online. The company focuses on making private diagnostics clearer, more convenient and more transparent for individuals, health-conscious patients, biohackers, longevity users, executives and people monitoring ongoing health concerns.
London Blood Tests also supports patients looking for more personalised health data, including advanced panels for fatigue, hormone imbalance, metabolic health, inflammation, nutritional deficiencies, thyroid function, liver and kidney function, cardiovascular risk, peptide use and preventative health screening.
Locations / service areas: London, Greater London and UK-wide home visit availability. Clinic access includes central London locations such as Knightsbridge and Holborn, with additional partner clinic coverage listed for Paddington and Ilford.
Website: londonbloodtests.uk
Email: info@londonbloodtests.uk
Phone: 0203 488 0809
