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17-OH Progesterone is a precursor steroid hormone essential for producing cortisol and androgens like testosterone. For men, monitoring this marker may provide insight into adrenal function and androgen production pathways.

ACTH is a pituitary hormone that directs your adrenal glands to produce cortisol. For men, ACTH levels may reflect how your body handles physical and mental stress, directly influencing energy and hormonal balance.

Androstenedione is a key precursor hormone that your body converts into testosterone. For men, monitoring this marker may offer direct insight into your testosterone production pathway and overall androgenic hormone balance.

Calcitonin is a thyroid hormone that helps regulate calcium and bone metabolism. For men, monitoring calcitonin may provide insight into thyroid C-cell health and calcium balance, supporting a complete picture of your hormonal status.

Cortisol is the primary stress hormone that influences energy, metabolism, and recovery. For men, chronic elevation may affect testosterone production and body composition.

DHEA-S is an adrenal androgen precursor that supports testosterone production. Monitoring helps men assess adrenal reserve and age-related hormonal decline.

DHT is the most potent androgen in men, influencing hair patterns, prostate health, and sexual function. Monitoring supports a comprehensive picture of androgenic health.

Dopamine is a key neurotransmitter influencing motivation, focus, and drive. This urine test measures overall dopamine production, supporting a comprehensive assessment of men's neurological and adrenal health.

Estradiol (E2) is the primary estrogen in men, influencing bone density, libido, and cardiovascular health. While often associated with women, balanced estradiol levels are essential for men's wellbeing. Your healthcare provider can help interpret your results.

Follicle-stimulating hormone (FSH) regulates sperm production and testicular function in men. It is produced by the pituitary gland and works alongside LH and testosterone. Abnormal levels may indicate issues with fertility or hormonal regulation worth discussing with your provider.

Free testosterone is the unbound fraction that directly fuels muscle growth, energy, libido, and mental sharpness in men. It may provide a clearer picture of your androgen status than total testosterone alone. Your healthcare provider can help evaluate your results.

IGF-1 is a key growth factor that may influence muscle development, recovery, and overall vitality in men. Monitoring this marker can provide insight into your body's repair and growth capacity.

IGF-BP3 is the primary carrier protein for IGF-1 and plays a role in regulating growth factor activity. For men, understanding IGF-BP3 levels alongside IGF-1 can help assess muscle maintenance, recovery potential, and overall vitality.

Inhibin B is a key marker of testicular function in men. Produced by Sertoli cells, it reflects the health of sperm production and may provide important insight into male fertility and gonadal health.

LH is a pituitary hormone that directly stimulates testosterone production in men. Monitoring LH levels can help assess whether your testosterone output is being adequately supported by the pituitary gland.

Melatonin is the body's primary sleep hormone, and quality sleep is fundamental to men's health, including testosterone production, muscle recovery, and mental sharpness. Monitoring melatonin can help assess your sleep health.

Parathyroid hormone (PTH) regulates calcium and phosphorus in the blood and plays a key role in bone strength. For men, balanced PTH levels may support skeletal integrity and overall mineral metabolism.

Parathyroid hormone regulates calcium balance, which is essential for bone strength, muscle function, and nerve signalling in men. Monitoring PTH can help assess whether your calcium metabolism supports an active, strong physique.

Pregnenolone is the foundational precursor for testosterone, DHEA, and cortisol production in men. Understanding your pregnenolone levels can help assess the raw material available for maintaining optimal male hormone balance.

Prolactin is a pituitary hormone that, when elevated in men, may suppress testosterone production and affect libido and energy. Monitoring prolactin is important for understanding your complete hormonal picture.

SHBG is a protein that binds testosterone and oestradiol and carries them through your blood. Whatever is bound to it cannot reach your tissue. SHBG therefore decides how much of your total testosterone is actually working. That is why a single number so often falls short. A low SHBG drags the total down while free testosterone stays normal. A high SHBG holds the total up while the free fraction falls. In men a low SHBG is also a finding in its own right. It usually points to excess weight or insulin resistance. The reference range rises with age as well. A low result is therefore easily missed after fifty.

Serotonin is a neurotransmitter involved in mood regulation, sleep quality, and digestive health. For men, balanced serotonin levels may support emotional resilience, restful sleep, and overall mental well-being.

Total testosterone is the primary male hormone, essential for muscle development, bone strength, energy, and reproductive health. For men, monitoring testosterone levels may help identify changes that affect vitality and overall well-being.

Free T3 is considered the most active thyroid hormone and may play an important role in men's metabolism, muscle maintenance, and energy levels. Some healthcare providers suggest that optimal Free T3 can support male vitality and body composition.

Free T4 is the main hormone produced by the thyroid gland and may play an important role in men's metabolic rate, energy levels, and body composition. Some healthcare providers suggest that optimal T4 supports male hormonal balance and physical performance.

Reverse T3 is an inactive thyroid hormone that may increase during stress or illness. For men, elevated levels might affect energy, metabolic rate, and overall vitality. Some healthcare providers use it to assess whether the body is efficiently converting thyroid hormones.

TPO antibodies indicate potential autoimmune thyroid activity. For men, undetected thyroid autoimmunity may gradually affect energy, metabolism, and overall vitality. Testing TPO antibodies can help your healthcare provider identify issues before noticeable symptoms develop.

Your TSH level shows how hard the pituitary is driving your thyroid. Our usual range runs from 0.27 to 4.20 mE/L. In men with low energy or a declining libido, testosterone is often the only thing checked. The thyroid explains those complaints at least as often. A high TSH level fits an underactive thyroid. A low TSH level fits an overactive one. So low is not the favourable side here, and that is the main misunderstanding on this page.

TRAb antibodies target the TSH receptor and are associated with Graves' disease. For men, undiagnosed autoimmune hyperthyroidism may affect muscle mass, energy levels, and cardiovascular health. Your healthcare provider can determine if TRAb testing is appropriate for your situation.

TSI is an antibody linked to Graves' disease that may cause overactive thyroid function. In men, thyroid imbalances can potentially affect energy, metabolism, and overall vitality. Your healthcare provider can help determine if TSI testing is appropriate for you.

Thyroglobulin is a protein produced by the thyroid gland that may provide insight into thyroid health for men. Some healthcare providers use thyroglobulin levels to assess thyroid gland activity and size, which can influence metabolic rate and energy levels.

Thyroglobulin Antibodies are immune markers that may indicate autoimmune thyroid activity in men. Some healthcare providers note that thyroid autoimmunity can subtly affect energy, metabolism, and hormonal balance, making early detection potentially valuable for men's health.

Total T3 measures the most active thyroid hormone in your blood. For men, T3 levels may influence energy, metabolism, and body composition. Understanding your T3 status can be part of a comprehensive approach to men's health and vitality.

Active Vitamin B12 measures the bioavailable B12 your body can directly use. For men, adequate B12 may support energy levels, muscle function, and nervous system health. This test could offer a clearer picture than total B12 alone.

Folate measures vitamin B9 levels in your blood. For men, adequate folate may support cardiovascular health, red blood cell production, and cellular repair processes that are important for maintaining energy and vitality.

Holotranscobalamin measures the earliest marker of B12 deficiency. For men, early detection of B12 depletion may help preserve energy levels, cognitive sharpness, and nervous system health before symptoms develop.

Intrinsic Factor Antibodies tests for autoimmune causes of B12 deficiency. For men experiencing persistent low B12 despite adequate nutrition, this test may help identify whether pernicious anaemia is preventing proper B12 absorption.

MMA Blood measures a functional marker of B12 status in your blood. For men, this test may help identify cellular B12 deficiency that standard tests might miss, potentially affecting energy, cognitive function, and physical performance.

MMA Urine offers a non-invasive assessment of functional B12 status. For men, this test may help identify cellular B12 deficiency that could affect energy metabolism, cognitive sharpness, and physical performance without requiring a blood draw.

Vitamin A measures retinol levels, a fat-soluble vitamin important for men's health. Adequate vitamin A may support immune function, skin integrity, reproductive health, and vision, all of which contribute to overall male vitality.

Vitamin B1 (thiamine) is considered essential for energy metabolism, which may support physical performance in men. Some men may notice fatigue or reduced endurance when levels are suboptimal. A healthcare provider can help assess your results.

Vitamin B12 is considered vital for red blood cell production, nerve health, and energy metabolism in men. Low levels may contribute to fatigue and reduced performance. Healthcare providers can help determine if your levels are optimal.

Vitamin B2 (riboflavin) is considered important for energy metabolism and antioxidant protection in men. It may support cellular energy production during physical activity. A healthcare provider can help assess whether your levels are optimal.

Vitamin B3 (niacin) is considered important for NAD+ production, which may support energy metabolism and cellular repair in men. Adequate levels may contribute to cardiovascular and metabolic health. Consult your healthcare provider for personalised guidance.

Vitamin B6 is considered important for amino acid metabolism and neurotransmitter production in men. It may support muscle protein synthesis and testosterone metabolism. A healthcare provider can help assess whether your levels are optimal.

Vitamin B7 (biotin) is considered important for men's hair health, skin integrity, and macronutrient metabolism. Some men may notice changes in hair or nail quality when levels are low. Consult your healthcare provider for personalised assessment.

Vitamin C is a powerful antioxidant considered important for men's immune function, collagen production, and iron absorption. It may support tissue repair after physical activity. Healthcare providers can help assess your optimal levels.

Your vitamin D levels show how much vitamin D you have in store. In the Netherlands that mostly reflects the sun of the past few months. Do you train indoors and work indoors? Do you commute in the dark? Then a low result in February says nothing about your effort. The number follows your exposure, not your discipline. The cut-off also differs between laboratories. Read your result next to the range printed on your own report.

Vitamin E protects cells from oxidative stress, supporting muscle recovery and cardiovascular health. It is an important antioxidant for active men.

Vitamin K1 is vital for blood clotting and bone integrity. Keeping levels in check supports recovery from injury and long-term skeletal strength.