At home advanced testosterone blood test
Home Testosterone Test Kit UK | Advanced Male Hormone Panel
A focused five marker home blood test assessing total testosterone, free testosterone and the proteins that influence androgen availability.
The panel reports total testosterone, free testosterone, SHBG, albumin and free androgen index. It can provide useful androgen context, but it cannot diagnose testosterone deficiency, infertility, erectile dysfunction, pituitary disease or testicular disease by itself.
This product does not include LH, FSH, prolactin, oestradiol, thyroid markers, PSA, a full blood count or semen analysis. Additional tests may be needed to identify the cause of a low, borderline or high result.
Testosterone treatment requires confirmation, investigation of the cause, fertility discussion, contraindication checks and ongoing monitoring. Do not start, stop or alter treatment without a prescribing clinician.
Quality and compliance
Home testing supported by UK clinical standards
What this advanced male hormone test measures
| Health area | Reported markers | What they may help show |
|---|---|---|
| Total testosterone | Total testosterone | The overall amount of circulating testosterone in bound and unbound forms. |
| Available testosterone | Free testosterone | The fraction estimated to be available to tissues, depending on the laboratory method. |
| Hormone binding | SHBG and albumin | Proteins that help explain the relationship between total and free testosterone. |
| Calculated ratio | Free androgen index | A testosterone to SHBG ratio that has important limitations in men. |
Who may consider this test?
This focused panel may be considered by adult men seeking selected hormone information in the context of:
- Reduced libido or loss of morning erections
- Erectile dysfunction
- Persistent tiredness, low mood or reduced muscle strength
- An earlier low or borderline total testosterone result
- Possible SHBG related distortion of total testosterone
- Monitoring requested by a GP, endocrinologist, urologist or prescribing clinician
These symptoms are non specific. Sleep disorders, depression, medicines, obesity, diabetes, vascular disease, alcohol and other conditions may produce similar symptoms.
Morning timing and repeat testing
| Testing point | Recommended approach |
|---|---|
| Collection time | Collect in the morning, ideally between 8 am and 11 am, because testosterone changes through the day. |
| Fasting | Follow the kit instructions. UK diagnostic pathways commonly use a fasting morning sample for consistency. |
| Health status | Test when physiologically well. Acute illness, poor sleep, major calorie restriction and overtraining may temporarily alter results. |
| Repeat testing | A low or borderline result should normally be repeated on a separate morning before diagnosis. |
| Venous confirmation | A clinician may request a venous serum sample where a capillary result is low, borderline, discordant or being used for a treatment decision. |
How the home testosterone test kit works
Prepare for morning collection
Review fasting, medicine, supplement, illness and hormone gel instructions before testing.
Collect and return
Collect capillary blood into the supplied microtainer and return it using the provided packaging.
Review the complete pattern
Interpret total testosterone, free testosterone, SHBG and albumin together rather than relying on FAI alone.
Preparing for the test
| Preparation | What to do |
|---|---|
| Morning sample | Collect between 8 am and 11 am where possible and record the exact collection time. |
| Food and water | Follow the fasting instruction supplied with the kit. Plain water is normally allowed and supports capillary collection. |
| Medicines | Record opioids, glucocorticoids, anticonvulsants, antipsychotics, fertility medicines and other prescribed treatment. |
| Hormone products | Record testosterone, anabolic steroids, hormone boosters and any contact with hormone gels. Do not change prescribed treatment yourself. |
| Biotin | High dose biotin may interfere with some hormone assays. Ask whether it should be paused. |
| Exercise and alcohol | Avoid unusually strenuous exercise and heavy alcohol intake before collection. |
| Recent illness | Delay non urgent testing until recovered where possible because illness can temporarily lower testosterone. |
| Sleep | Record significant sleep deprivation, shift work or obstructive sleep apnoea because these may affect interpretation. |
Common result patterns
These examples support discussion and are not diagnoses.
| Pattern | Possible context | Possible next step |
|---|---|---|
| Low total and low free testosterone | May support reduced androgen status when compatible symptoms are present. | Repeat on a separate fasting morning and consider LH, FSH and prolactin. |
| Low total testosterone with low SHBG | Total testosterone may appear low while calculated free testosterone remains within range. | Review weight, metabolic health, thyroid context and a validated free testosterone calculation. |
| Normal total testosterone with high SHBG | The free testosterone fraction may be lower than total testosterone alone suggests. | Review calculated free testosterone and possible liver, thyroid, medicine or weight factors. |
| High testosterone | May reflect prescribed treatment, anabolic steroids, gel contamination, supplement exposure or less common endocrine causes. | Review all hormone products and repeat under controlled conditions if unexpected. |
| Abnormal albumin | May affect calculated free testosterone and may indicate a wider medical issue. | Consider liver, kidney, inflammation and hydration assessment. |
Biomarkers and result interpretation
Select each marker to read what it measures, preparation guidance and how low, normal, high, undefined or critical results may be considered.
Free androgen index
Free androgen index, known as FAI, is calculated as total testosterone divided by SHBG and multiplied by 100. It is a ratio rather than a direct measurement of free testosterone.
FAI is used primarily when assessing androgen excess in women. Several NHS laboratories state that it is not appropriate as a male free testosterone estimate. In men, a validated calculated free testosterone method using total testosterone, SHBG and albumin is generally more informative.
FAI should not be used to decide whether testosterone replacement is needed or to adjust a treatment dose.
Collect in the morning, ideally between 8 am and 11 am, while fasting and physiologically well. Record testosterone, anabolic steroids, opioids, glucocorticoids, anticonvulsants, fertility medicines, high dose biotin and any contact with hormone gels.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May reflect lower total testosterone, higher SHBG or both. | Do not diagnose testosterone deficiency from FAI. Review total testosterone, SHBG, albumin, calculated free testosterone and symptoms. |
| Normal | Falls within the reporting laboratory category. | A normal FAI does not prove that male testosterone status is normal. |
| Undefined | The calculation could not be interpreted reliably, often because testosterone or SHBG was outside the analytical range. | Follow the laboratory recommendation and discuss repeat testing. |
| High | May reflect higher total testosterone, lower SHBG, testosterone treatment, anabolic steroids or other factors. | Discuss an unexpected result and all hormone products with a clinician. |
Albumin
Albumin is the principal protein in blood plasma and carries hormones, medicines and other substances. Some testosterone binds loosely to albumin.
Albumin can be used with total testosterone and SHBG when calculating free testosterone. This single marker is not a complete liver, kidney or nutritional assessment.
Maintain normal hydration. Record liver disease, kidney disease, significant inflammation, major weight loss and prescribed medicines.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Critical low | A very low result can occur with serious liver disease, kidney protein loss, severe inflammation, malnutrition or critical illness. | Arrange prompt clinical review and follow urgent laboratory advice. |
| Low | May reflect inflammation, liver disease, kidney loss, poor intake, malabsorption or fluid overload. | Discuss wider liver, kidney and inflammatory assessment with a GP. |
| Normal | Falls within the laboratory reference interval. | Use it as part of calculated free testosterone interpretation where relevant. |
| High | Most commonly reflects dehydration or concentration of the blood sample. | Review hydration and discuss a persistent unexpected result with a clinician. |
| Critical high | A very high albumin result is unusual and may reflect severe dehydration, sample issues or analytical factors rather than a specific hormone disorder. | Follow the laboratory's urgent or repeat testing advice. |
Free testosterone
Free testosterone represents the small fraction of testosterone that is not tightly bound to SHBG or albumin and is available to tissues.
The result may be measured directly or calculated from total testosterone, SHBG and albumin. The method and laboratory reference interval matter, particularly when total testosterone is borderline or SHBG is outside its usual range.
Collect in the morning, ideally between 8 am and 11 am, while fasting and physiologically well. Record testosterone, anabolic steroids, opioids, glucocorticoids, anticonvulsants, fertility medicines, high dose biotin and any contact with hormone gels.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May support reduced androgen availability when compatible symptoms are present. Causes can be testicular, pituitary, hypothalamic, medicine related, metabolic or systemic. | Confirm the finding with repeat morning testing and clinical assessment. |
| Normal | Falls within the laboratory interval. | Persistent symptoms may still require evaluation for sleep, mood, thyroid, vascular, medicine or other causes. |
| High | May reflect testosterone treatment, anabolic steroid use, low SHBG, sample contamination, assay factors or less common endocrine conditions. | Discuss an unexpected result with a clinician and declare all hormone products. |
Sex hormone binding globulin
Sex hormone binding globulin, known as SHBG, is produced mainly by the liver and binds testosterone in the circulation.
SHBG changes the relationship between total and free testosterone. A total testosterone result can appear lower or higher depending on the SHBG concentration.
Collect in the morning, ideally between 8 am and 11 am, while fasting and physiologically well. Record testosterone, anabolic steroids, opioids, glucocorticoids, anticonvulsants, fertility medicines, high dose biotin and any contact with hormone gels.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with obesity, insulin resistance, an underactive thyroid, androgen exposure, liver factors or some medicines. | Interpret total testosterone with a validated free testosterone calculation and the wider metabolic context. |
| Normal | Falls within the laboratory interval. | Use it with total testosterone and albumin when free testosterone is calculated. |
| High | May occur with ageing, an overactive thyroid, liver disease, oestrogen exposure, some anticonvulsants or low body weight. | Discuss the complete hormone pattern with a clinician. |
Total testosterone
Total testosterone measures testosterone circulating in protein bound and unbound forms. It is the usual first laboratory test when testosterone deficiency is suspected.
A diagnosis cannot be made from symptoms or one result alone. UK pathways generally require compatible symptoms and two separate low morning testosterone results while the person is well.
Testosterone replacement can suppress sperm production. Fertility intentions should be discussed before treatment is started or changed.
Collect in the morning, ideally between 8 am and 11 am, while fasting and physiologically well. Record testosterone, anabolic steroids, opioids, glucocorticoids, anticonvulsants, fertility medicines, high dose biotin and any contact with hormone gels.
How to understand this result
| Result | What it may mean | What to do |
|---|---|---|
| Low | May occur with primary testicular dysfunction, pituitary or hypothalamic suppression, obesity, acute illness, sleep disruption, medicines, anabolic steroid withdrawal or systemic disease. | Repeat on a separate fasting morning and consider LH, FSH, prolactin and other investigations. |
| Normal | Falls within the laboratory reference interval. | Persistent symptoms may have another cause and still merit clinical assessment. |
| High | Most often reflects prescribed testosterone, anabolic steroids, supplement contamination, gel transfer or assay factors. Less common endocrine causes are possible. | Discuss an unexpected result and all hormone products with a clinician. |
What this panel does not include
| Not included | Why it may matter |
|---|---|
| LH and FSH | May help distinguish a primary testicular cause from pituitary or hypothalamic suppression. |
| Prolactin | Persistent elevation can suppress reproductive hormone signalling. |
| Thyroid markers | Thyroid dysfunction can contribute to tiredness, weight change, libido and erectile symptoms. |
| Full blood count and haematocrit | These are important when testosterone treatment is being considered or monitored. |
| PSA | Prostate assessment may be required before or during testosterone treatment depending on age and clinical context. |
| Semen analysis | Required to assess sperm concentration, movement and shape. |
Evidence and content standards
How this product information was prepared
This page was prepared from the supplied five marker Advanced Male Hormone Test specification and checked against current UK guidance on morning testosterone collection, repeat testing, SHBG, calculated free testosterone, albumin and the limitations of FAI in men.
Clinical accountability
Clinical content, evidence and quality review
The review roles are intentionally separated so the page is checked for medical safety, evidence accuracy and patient facing governance. The review concerns general product information and does not replace specialist endocrinology assessment.
Dr Laura Geige
Medical Director, Senior Practitioner and Skin Expert
Reviewed symptom escalation, medicine and hormone cautions, treatment boundaries and the clarity of patient facing medical information.
View professional profileDr Rimas Geiga
Medical Doctor, Nutritional Sciences Adviser and Healthy Ageing Expert
Reviewed testosterone, body composition, metabolic health, healthy ageing context and the limits of interpreting lifestyle related hormone changes.
View professional profileVeronika Matutyte
Medical Doctor and Healthcare Management Expert
Reviewed laboratory pathway wording, repeat testing, governance, urgent symptoms and the separation of home testing from diagnosis and prescribing.
View professional profileAuthoritative references
UK testosterone and hormone testing information
View NICE and NHS laboratory sources
- NICE assessment and repeat morning testosterone testing
- NHS biochemical investigation of suspected endocrine problems in men
- NHS calculated free testosterone guidance
- NHS SHBG and FAI limitation in males
- NHS free androgen index formula and preparation
- NHS testosterone and calculated free testosterone information
- NHS information on non specific male hormone symptoms
- UKAS medical laboratory accreditation
- CQC diagnostic and screening services guidance
Search led questions
Home testosterone and advanced male hormone test FAQs
Can I test testosterone at home?
Yes. This kit uses a capillary blood sample collected at home and returned for laboratory analysis. A home result can provide useful context, but low testosterone should not be diagnosed from one result alone.
What does the advanced male hormone test check?
The panel reports total testosterone, free testosterone, sex hormone binding globulin, albumin and free androgen index. Some results may be calculated from the measured markers, so the report should identify the method used.
What is the best time to take a testosterone blood test?
Collect the sample in the morning, ideally between 8 am and 11 am. Testosterone follows a daily rhythm and is usually higher earlier in the day.
Do I need to fast for a testosterone test?
For the most comparable result, UK clinical pathways commonly use a fasting morning sample. Plain water is normally allowed. Follow the instructions supplied with the kit.
Can one testosterone result diagnose low testosterone?
No. Diagnosis requires compatible symptoms and usually two separate low morning testosterone results, together with clinical assessment and investigation of the cause.
What testosterone level is considered low in the UK?
There is no single number that diagnoses every person. Laboratories use their own reference intervals, and clinicians interpret the result with symptoms, collection time, SHBG, free testosterone, illness, medicines and repeat testing.
What is the difference between total and free testosterone?
Total testosterone includes protein bound and unbound testosterone. Free testosterone estimates the small fraction available to tissues and is interpreted with SHBG and albumin.
Is free testosterone measured or calculated?
It may be measured directly or calculated from total testosterone, SHBG and albumin. Calculated free testosterone is commonly used when total testosterone is borderline or SHBG is abnormal. The report should state the method.
What is free androgen index?
Free androgen index is calculated as total testosterone divided by SHBG and multiplied by 100. It is used mainly when assessing androgen excess in women and is not considered an appropriate standalone estimate of free testosterone in men.
Can free androgen index guide testosterone replacement in men?
No. FAI should not be used by itself to diagnose male testosterone deficiency or decide testosterone treatment. Symptoms, repeat morning total testosterone and a validated free testosterone calculation are more relevant.
What does SHBG show?
SHBG is a protein that binds testosterone. A high or low SHBG can change the relationship between total testosterone and the fraction available to tissues.
Why is albumin included?
Albumin binds testosterone more loosely than SHBG and is used in some calculated free testosterone methods. It also provides limited general context on hydration, inflammation, liver function and kidney protein loss.
Can illness, poor sleep or weight change affect testosterone?
Yes. Acute illness, sleep disruption, major calorie restriction, significant weight change, overtraining, alcohol and some medicines can alter testosterone. Test when physiologically well where possible.
Can biotin affect testosterone test results?
High dose biotin, which is vitamin B7, can interfere with some laboratory hormone assays. Ask the testing service or a clinician whether it should be paused.
Can testosterone gel contaminate a blood sample?
Yes. Contact with testosterone gel can produce a falsely high result. Wash hands carefully, avoid touching another person's application area and follow the laboratory instructions about collection timing.
Can anabolic steroids affect the results?
Yes. Anabolic steroids and testosterone products can raise measured testosterone and suppress the body's own hormone signalling. Declare all prescribed and non prescribed hormone products.
Does this test check male fertility?
No. It does not include LH, FSH or a semen analysis. The principal test for sperm concentration, movement and shape is a semen analysis.
Can testosterone treatment reduce fertility?
Yes. Testosterone replacement can suppress LH and FSH and reduce sperm production. Fertility intentions should be discussed before treatment is started or changed.
What happens after a low or borderline result?
A clinician may repeat testosterone on a separate fasting morning and request LH, FSH, prolactin, thyroid tests, ferritin or other investigations to identify a possible cause.
When should symptoms be treated as urgent?
Seek urgent medical help for sudden severe testicular pain, a new testicular lump, severe headache with visual changes, collapse, severe breathlessness or another rapidly worsening symptom.
Are the laboratories UKAS accredited and CQC registered?
Samples are processed through UKAS accredited laboratories within a CQC registered diagnostic pathway. Collection equipment is UKCA and CE marked and supported by an ISO 13485 quality management framework.
