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Hormones

Melatonin

Melatonin governs your sleep-wake cycle, and sleep is one of the most critical factors in physical recovery and performance. Monitoring melatonin can help identify whether your circadian rhythm supports optimal training adaptation.

Doctor's Assessment Included

What It Measures

This test measures the concentration of melatonin in your blood. Melatonin is the primary hormone involved in regulating circadian rhythms, with production increasing in darkness and decreasing with light exposure.

Why It Matters

For active individuals, sleep quality directly impacts recovery, reaction time, and performance capacity. Melatonin levels may indicate whether your sleep environment and habits are supporting your training goals.

When to Test

Testing may be recommended if you experience persistent sleep difficulties, jet lag recovery issues, shift work sleep disorder, or if your healthcare provider suspects a circadian rhythm disorder. Timing of the test is important for accurate results.

Symptoms

Low Levels

Some people with low melatonin may experience difficulty falling asleep, poor sleep quality, daytime fatigue, or mood changes. Low levels are sometimes associated with ageing, excessive light exposure at night, or certain medications.

High Levels

Elevated melatonin levels are uncommon but may be associated with excessive daytime drowsiness, seasonal affective symptoms, or certain rare conditions. Consult your healthcare provider for evaluation of high results.

Lifestyle Tips

Reducing screen time before bed, maintaining a consistent sleep schedule, and ensuring your bedroom is dark may support natural melatonin production. Morning light exposure can help regulate your circadian rhythm. Discuss any supplements with your healthcare provider.

Frequently Asked Questions

What time of day should melatonin be tested?
Melatonin levels vary throughout the day. Testing is typically done at specific times as directed by your healthcare provider, often in the evening or early morning to capture peak production.
Does blue light really affect melatonin production?
Yes, blue light from screens and artificial lighting can suppress melatonin production. Reducing light exposure in the evening may help support your natural sleep-wake cycle.
Can melatonin levels decline with age?
Melatonin production often decreases with age, which may contribute to changes in sleep patterns commonly experienced by older adults. Consult your healthcare provider for guidance.

Tests with related values

These panels measure values from the same category as this marker.

Whoop

A 44-biomarker comprehensive health panel inspired by WHOOP Advanced Labs — a deep look at metabolism, cardiovascular risk, hormones, liver, kidney and inflammation.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol Cortisol DHEA-S Estradiol (E2) Free Testosterone FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Total Testosterone Bicarbonate Calcium Chloride Ferritin Iron (Serum) Magnesium Potassium Sodium Transferrin CRP (C-Reactive Protein) Homocysteine Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Omega-3 Index Total Cholesterol Albumin HOMA-IR ALP (Alkaline Phosphatase) AST (Aspartate Aminotransferase) Bilirubin (Total) Total Protein Urea (BUN) Creatinine Vitamin D (25-OH) eGFR (Estimated Glomerular Filtration Rate) Insulin (Fasting) Leukocyte Differential Transferrin Saturation Lipoprotein(a) Triglycerides Basic Blood Count
€499,-
Health Checkups

InsideTracker

A 36-biomarker performance and longevity panel inspired by InsideTracker Ultimate — covering heart, hormones, metabolism, inflammation, recovery and iron status.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol GGT (Gamma-Glutamyl Transferase) Cortisol DHEA-S Estradiol (E2) Free Testosterone Total Testosterone Folate (Folic Acid) Vitamin B12 Calcium Ferritin Iron (Serum) Magnesium Magnesium (Intracellular) Potassium Progesterone Sodium Transferrin CRP (C-Reactive Protein) Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Total Cholesterol Albumin AST (Aspartate Aminotransferase) Vitamin D (25-OH) Insulin (Fasting) Leukocyte Differential Creatine Kinase (CK) Transferrin Saturation Triglycerides Basic Blood Count
€399,-

Melatonin

€88,-