Oestrogen Dominance Panel
A targeted five-marker panel assessing oestradiol, progesterone, the oestradiol-to-progesterone ratio, SHBG, and testosterone.
£89.00
View test
Overview
What Is Poor Sleep?
Poor sleep encompasses a range of disruptions including difficulty initiating sleep (sleep onset insomnia), waking frequently during the night, waking too early, and feeling unrefreshed on waking despite spending sufficient hours in bed. Together these patterns are among the most common health complaints in the UK, affecting an estimated one in three adults at any given time.
Sleep is tightly regulated by several hormonal systems. Cortisol follows a diurnal rhythm — it should peak in the early morning to promote wakefulness and fall to its lowest levels by late evening to facilitate sleep onset. When this rhythm is disrupted — through chronic stress, shift work, or adrenal dysfunction — elevated evening cortisol prevents the brain from settling. Magnesium is a co-factor for GABA receptors, the principal inhibitory neurotransmitters that switch the nervous system into sleep mode; deficiency leads to hyperarousal and restless, fragmented sleep. Testosterone in men supports deeper slow-wave sleep, and falling levels with age partly explain why older men sleep more lightly. Thyroid dysfunction — both overactivity (causing anxiety-driven insomnia) and underactivity (causing fatigue without restful sleep) — disrupts sleep architecture.
Poor sleep warrants medical investigation when it persists beyond four weeks, significantly impairs daytime functioning, or is accompanied by physical symptoms such as loud snoring, gasping episodes, night sweats, or a very rapid or irregular heartbeat. Identifying a hormonal or nutritional driver of poor sleep enables targeted treatment rather than indefinite reliance on sleep hygiene advice or medication.
Sleep hygiene alone may not be enough
Strict sleep hygiene is helpful but cannot overcome a physiological barrier such as elevated evening cortisol, magnesium deficiency, or an underactive thyroid. If you have already optimised your sleep environment and habits, a blood test is the logical next step.
Related experience
Common Symptoms Associated With Poor Sleep
Poor sleep disrupts the hormonal and neurological foundations of energy and cognition, frequently triggering a cascade of related symptoms.
The big picture
What Causes Poor Sleep?
Poor sleep can stem from a wide range of hormonal, nutritional, metabolic, and lifestyle causes — many of which are identifiable through a simple blood test.
What to measure
Biomarkers Associated With Poor Sleep
These blood markers are the most informative when investigating hormonal and nutritional causes of poor sleep.
Cortisol
Morning level — circadian regulation
Magnesium
GABA co-factor — nervous system calm
TSH
Thyroid function — sleep architecture
Testosterone
Slow-wave sleep regulation in men
Ferritin
Iron — restless legs and sleep fragmentation
Vitamin D
Linked to sleep duration and quality
Free T4
Active thyroid hormone
CRP
Inflammation — associated with fragmented sleep
Underlying causes
Conditions Associated With Poor Sleep
These conditions are commonly associated with poor sleep and may be identified or excluded through blood testing and clinical review.
Getting answers
How Poor Sleep Is Investigated
A structured investigation of poor sleep distinguishes lifestyle contributors from hormonal and medical causes, guiding the most effective intervention.
1
Sleep history
Document the pattern of poor sleep — difficulty falling asleep suggests high evening cortisol or anxiety; early morning waking points to depression or adrenal dysregulation; unrefreshing sleep despite adequate hours suggests sleep apnoea or thyroid dysfunction.
2
Lifestyle and substance review
Caffeine intake, alcohol use, screen exposure in the evening, shift work, and exercise timing are all assessed. These are addressed first before attributing poor sleep purely to a biochemical cause.
3
Blood testing
A targeted hormonal and nutritional panel covering cortisol, magnesium, TSH, testosterone, ferritin, vitamin D, and CRP identifies hormonal and nutritional drivers of poor sleep quickly and objectively.
4
Sleep study or specialist referral
If sleep apnoea is suspected — especially in those who snore, are overweight, or have observed breathing pauses — a home sleep study or ENT or respiratory referral is warranted alongside blood testing.
Recommended testing
Recommended Blood Tests
Private blood tests analysed by UK-accredited laboratories, with clear results and optional GP review.
Advanced Health and Wellness Panel
A 28-biomarker advanced panel covering full blood count, thyroid (TSH, FT4), extended liver and kidney function, full cholesterol, HbA1c, iron status, and CRP.
£139.00
View test
PCOS Hormone Panel
A targeted nine-marker hormonal and metabolic screen designed to assess the key features of polycystic ovary syndrome — including androgens.
£109.00
View test
Vitamin D Test
Measure your 25-OH vitamin D level with a simple home fingerstick kit. Results reviewed by a GMC-registered physician and returned in 3 to 5 working days.
£29.00
View test
B12 and Folate Test
Check your vitamin B12 and folate levels with a simple home fingerstick test. Ideal for vegans, those on metformin.
£39.00
View test
Everyday contributors
Lifestyle Factors That Can Contribute
Sleep is profoundly sensitive to lifestyle choices — these factors are among the most powerful determinants of sleep quality and duration.
Blue light exposure
Screens suppress melatonin and delay sleep onset
Caffeine after midday
Caffeine has a 5–6 hour half-life and disrupts sleep architecture into the night
Alcohol
Aids sleep onset but fragments the second half of the night and suppresses REM sleep
Chronic stress
Elevated cortisol at night prevents the brain from entering deep, restorative sleep stages
Irregular light exposure
Inconsistent morning light exposure disrupts the circadian rhythm that governs sleep timing
Late evening exercise
Vigorous exercise within two hours of bed raises core temperature and cortisol, delaying sleep
Safety first
When To Seek Medical Advice
Most poor sleep is benign and responsive to treatment; however, certain presentations require prompt medical evaluation.
Red flags — speak to a doctor
These can point to a more serious underlying cause and should not be ignored.
- Observed pauses in breathing during sleep (possible sleep apnoea)
- Severe daytime sleepiness that is unsafe, e.g. when driving
- Chest discomfort, palpitations, or sweating at night
- Persistent night sweats accompanied by unexplained weight loss
Common questions
Frequently Asked Questions
Yes — cortisol follows a strict daily rhythm that should reach its lowest point in the late evening, enabling the transition to sleep. When cortisol remains elevated due to chronic stress, shift work, or adrenal dysfunction, the brain stays in a state of arousal that prevents sleep onset. A morning cortisol blood test provides an indirect measure of the diurnal cortisol pattern and is included in Trupoint Health’s Cortisol & Stress Panel.
Yes. Cortisol should fall to its lowest point at night to allow deep sleep. Chronic stress or adrenal dysfunction can keep evening cortisol elevated, making it hard to fall or stay asleep. Magnesium deficiency compounds this by reducing GABA activity — the brain’s main calming neurotransmitter. A cortisol and magnesium screen can identify both drivers.
A useful panel for poor sleep includes cortisol, magnesium, TSH, testosterone (in men), ferritin, vitamin D, and CRP. These markers collectively cover the main hormonal, nutritional, and inflammatory drivers of disrupted sleep. Trupoint Health’s Cortisol & Stress Panel and Advanced Health & Wellness Panel cover these markers conveniently.
Yes — testosterone plays an important role in sleep architecture, particularly in promoting deeper slow-wave sleep stages. As men age and testosterone levels decline, they experience more fragmented, lighter sleep. Men with clinically low testosterone commonly report waking frequently, feeling unrefreshed, and having reduced dream-stage (REM) sleep. Testosterone blood testing is a simple and informative first step in middle-aged and older men with unexplained sleep disruption.
Yes — hypothyroidism can cause paradoxically unrefreshing sleep: patients feel profoundly fatigued yet cannot achieve deep, restorative sleep stages. It is also associated with obstructive sleep apnoea, which further fragments overnight sleep. Conversely, an overactive thyroid (hyperthyroidism) causes anxiety, palpitations, and arousal that prevent sleep onset. A TSH blood test distinguishes both conditions and is included in comprehensive sleep-focused panels.
Keep exploring
Related Symptoms
Related Biomarkers
Related Conditions
Sources
References
-
NHS — View source
-
NICE — View source
-
Sleep Council UK — View source
This page is for general information only and does not replace personalised medical advice. If you are worried about your health, please speak to a qualified healthcare professional. Trupoint Health blood tests are analysed by UK-accredited laboratories.