Blood Tests by Symptom
Blood Tests by Symptom
If you have a persistent symptom, the blood markers below are commonly tracked when looking at the body systems often connected to it. Pair the result with your GP - your kit is for wellness insight; their review carries the clinical interpretation.
Jump to your symptom:
Most everyday symptoms touch more than one body system. The markers grouped below are the ones commonly tracked alongside each symptom - not because a single panel can explain what you are experiencing, but because they reflect the underlying body systems (nutritional stores, hormones, thyroid activity, blood-cell production, inflammation, metabolic balance) that are most often relevant to the conversation.
All tests below are available as at-home finger-prick kits from Lola Health. Your sample is analysed at a UKAS-accredited UK partner laboratory, and every result is reviewed by a GMC-registered doctor before being released to you with personalised commentary. No referral is required, and results are typically available within two to five working days.
For each symptom, we list the biomarkers commonly tracked alongside that symptom, the body systems those markers reflect, and a panel that covers them. Where we have published a longer wellness guide, we link to it so you can read more before ordering.
Fatigue / Tiredness
Persistent tiredness that does not improve with rest is one of the most common reasons people look at their biomarkers. It often overlaps with nutritional stores, thyroid activity and metabolic balance - areas where a panel can give you and your doctor a fuller picture.
Markers commonly tracked
- Iron (serum)
- Ferritin
- Vitamin D
- Vitamin B12
- TSH
- Free T4
- Free T3
- HbA1c
- Folate
- Full Blood Count
What these markers reflect: iron stores and oxygen-carrying capacity, vitamin D and B-vitamin status, thyroid activity, and longer-term blood-sugar balance. Your doctor's review accompanies the result with the clinical interpretation.
Hair Loss / Thinning
Thinning or excessive shedding affects both men and women and rarely traces back to a single cause. The markers below cover the nutritional and hormonal areas most often discussed alongside hair changes.
Markers commonly tracked
- Ferritin
- TSH
- Free T4
- Testosterone
- SHBG
- Vitamin D
- Iron
- Vitamin B12
What these markers reflect: iron stores, thyroid activity, androgen balance and binding capacity, vitamin D and B-vitamin status. Your doctor's review accompanies the result with the clinical interpretation.
Brain Fog
Difficulty concentrating, forgetfulness and a sense of mental cloudiness are how people describe brain fog. It is not a medical diagnosis - but it does overlap with nutrient, thyroid and stress-hormone status, all of which a panel can look at.
Markers commonly tracked
- TSH
- Free T4
- Free T3
- Vitamin B12
- Folate
- Iron
- Ferritin
- HbA1c
- Cortisol
- Vitamin D
What these markers reflect: thyroid activity, B-vitamin and iron status, longer-term blood-sugar balance, and the body's stress-hormone activity. Your doctor's review accompanies the result with the clinical interpretation.
Unexplained Weight Changes
Changes in weight without a clear shift in diet or activity often prompt people to look at metabolic and hormonal markers. A panel can show how a few of these systems are currently behaving.
Markers commonly tracked
- TSH
- Free T4
- Free T3
- HbA1c
- Testosterone
- Cortisol
- SHBG
What these markers reflect: thyroid activity, longer-term blood-sugar balance, androgen status and binding capacity, and stress-hormone activity. Your doctor's review accompanies the result with the clinical interpretation.
Mood Changes
Shifts in mood, irritability and emotional volatility can have many drivers. Several common nutritional and hormonal markers overlap with mood and energy in the wellness conversation.
Markers commonly tracked
- TSH
- Free T4
- Vitamin D
- Vitamin B12
- Folate
- Cortisol
- Oestradiol
- Progesterone
- Testosterone
- Iron
What these markers reflect: thyroid activity, vitamin D and B-vitamin status, the body's stress-hormone activity, reproductive-hormone balance, and iron status. Your doctor's review accompanies the result with the clinical interpretation.
Irregular Periods
Cycles that are long, short, absent or unpredictable often prompt women to look at their hormonal markers. A comprehensive female-hormone panel covers the reproductive, thyroid and adrenal markers most often discussed.
Markers commonly tracked
- FSH
- LH
- Oestradiol
- Testosterone
- SHBG
- TSH
- Free T4
- Prolactin
- Progesterone
What these markers reflect: the pituitary-ovarian feedback loop, oestrogen and progesterone balance, androgen status and binding capacity, thyroid activity, and prolactin levels. Test FSH, LH and oestradiol around days 2 to 5 of your cycle and progesterone around day 21 for the most useful reading. Your doctor's review accompanies the result with the clinical interpretation.
Hot Flushes / Night Sweats
Sudden warmth, flushing and night sweats are commonly associated with the perimenopausal and menopausal transition. They can also overlap with thyroid activity, so the panel below covers both areas.
Markers commonly tracked
- FSH
- Oestradiol
- LH
- TSH
- Free T4
- Progesterone
What these markers reflect: the pituitary-ovarian feedback loop, oestrogen and progesterone balance, and thyroid activity. Your doctor's review accompanies the result with the clinical interpretation.
Low Libido
A persistent drop in sexual desire affects both men and women and often overlaps with hormonal status. The panel below covers androgen, thyroid and prolactin markers commonly tracked alongside.
Markers commonly tracked
- Testosterone
- Free Testosterone
- SHBG
- TSH
- Free T4
- Prolactin
- Oestradiol
- LH
What these markers reflect: total and free androgen status, binding capacity, thyroid activity, prolactin levels, and reproductive-hormone balance. Your doctor's review accompanies the result with the clinical interpretation.
Muscle Weakness / Aches
Unexplained muscle aches, cramps or weakness that are not tied to exercise or injury often overlap with nutritional and thyroid markers. Vitamin D and electrolyte status are common entry points in the wellness conversation.
Markers commonly tracked
- Vitamin D
- Creatine Kinase (CK)
- TSH
- Free T4
- Calcium
- Magnesium
- Iron
What these markers reflect: vitamin D and mineral status, muscle-cell turnover, thyroid activity, and iron status. Your doctor's review accompanies the result with the clinical interpretation.
Joint Discomfort
Stiff or uncomfortable joints often prompt people to look at inflammatory and nutritional markers. The panel below covers the wellness markers commonly tracked alongside joint changes.
Markers commonly tracked
- Uric Acid
- CRP
- HsCRP
- Vitamin D
- Full Blood Count
What these markers reflect: purine metabolism, general and high-sensitivity inflammation markers, vitamin D status, and blood-cell production. Your doctor's review accompanies the result with the clinical interpretation.
Frequent Colds & Slow Recovery
Catching frequent colds or recovering slowly can prompt people to look at their immune-related wellness markers. Several nutritional and blood-cell markers come up in this conversation.
Markers commonly tracked
- Full Blood Count
- Vitamin D
- Iron
- Ferritin
- Vitamin B12
- Folate
What these markers reflect: white and red blood-cell counts, vitamin D and B-vitamin status, and iron stores. Your doctor's review accompanies the result with the clinical interpretation.
Bruising Easily
Bruising more easily than expected is worth discussing with your GP. The wellness markers below cover blood-cell, liver and protein areas that sit alongside the clinical conversation.
Markers commonly tracked
- Full Blood Count (Platelets)
- ALT
- AST
- GGT
- Albumin
- Total Bilirubin
- Vitamin D
What these markers reflect: platelet count, liver-enzyme activity, protein and bilirubin status, and vitamin D status. Your doctor's review accompanies the result with the clinical interpretation.
Heart Palpitations
A racing or fluttering heart should be discussed with your GP. The wellness markers below cover thyroid, iron and mineral areas that often come up alongside the clinical conversation.
Markers commonly tracked
- TSH
- Free T4
- Free T3
- Iron
- Ferritin
- Full Blood Count
- Magnesium
- Calcium
What these markers reflect: thyroid activity, iron stores, blood-cell counts, and mineral status. Your doctor's review accompanies the result with the clinical interpretation.
Skin Changes (Acne, Dryness)
Persistent breakouts, dryness or other skin changes often prompt people to look at hormonal and nutritional markers. The panel below covers the wellness markers commonly tracked alongside skin changes.
Markers commonly tracked
- Testosterone
- Free Testosterone
- SHBG
- TSH
- Free T4
- Vitamin D
- ALT
- GGT
- DHEA-S
What these markers reflect: total and free androgen status, binding capacity, thyroid activity, vitamin D status, liver-enzyme activity, and adrenal androgen output. Your doctor's review accompanies the result with the clinical interpretation.
Digestive Discomfort
Recurring bloating, change in stool patterns or abdominal discomfort should be discussed with your GP. The wellness markers below cover liver, nutritional and inflammation areas that often sit alongside the clinical conversation.
Markers commonly tracked
- ALT
- AST
- GGT
- Total Bilirubin
- Iron
- Ferritin
- Vitamin B12
- Folate
- CRP
What these markers reflect: liver-enzyme and bilirubin status, iron and B-vitamin stores, and general inflammation. Your doctor's review accompanies the result with the clinical interpretation.
Poor Sleep
Trouble falling asleep, waking frequently or feeling unrefreshed often overlaps with thyroid, mineral and stress-hormone status. The wellness markers below cover those areas.
Markers commonly tracked
- TSH
- Free T4
- Cortisol
- Iron
- Ferritin
- Magnesium
- Vitamin D
- Vitamin B12
What these markers reflect: thyroid activity, stress-hormone activity, iron stores, mineral and vitamin D status, and B-vitamin status. Your doctor's review accompanies the result with the clinical interpretation.
How Lola Health Tests Work
Every test listed on this page follows the same straightforward process:
Order online
Choose the panel that matches what you want to look at. Free next-day delivery to any UK address.
Collect at home
A simple finger-prick sample - no GP appointment needed, and no fasting required for most panels.
Post your sample
Use the prepaid return envelope. Your sample reaches our UKAS-accredited UK partner laboratory within 24 hours.
Get your results
Results in 2-5 working days, reviewed by a GMC-registered doctor with personalised commentary.
You do not need a referral or a reason. The entire process is designed to fit around your schedule - no time off work, no waiting rooms.
Why Track Biomarkers Alongside Symptoms
A persistent symptom is information. The challenge is that everyday symptoms (tiredness, brain fog, mood changes, hair changes) sit on top of many different body systems. Looking at a panel of relevant biomarkers gives you objective context about what is happening in some of those systems, which makes the conversation with your doctor more productive.
A panel converts a subjective experience ("I feel tired all the time") into measurable numbers your doctor can review. The numbers do not tell you what to do; that is the doctor's job. But they give the conversation a starting point that is rooted in your own data rather than guesswork.
The other reason to look broadly is that everyday symptoms often have more than one contributing factor. A single-marker test in isolation can miss that picture; a wellness panel that covers the relevant body systems together gives a fuller view that you and your doctor can talk through.
Biomarkers That Come Up Most Often
Looking across the symptoms above, certain biomarkers come up repeatedly. If you are unsure which panel to choose, a comprehensive wellness panel that includes the markers below will cover the body systems most often discussed:
- Thyroid activity (TSH, Free T4, Free T3): appears alongside most everyday wellness symptoms. The thyroid sets the body's metabolic pace and touches energy, weight, hair, skin, sleep, heart rate and cycle regularity. A full thyroid view (not just TSH) gives a fuller picture.
- Iron and ferritin: iron status is one of the most commonly discussed nutritional areas, especially for women of reproductive age. Ferritin reflects your iron stores and can change before haemoglobin moves, so looking at both is more informative than either alone.
- Vitamin D: vitamin D status is widely tracked in the UK, where Public Health England recommends supplementation during winter months. It comes up alongside energy, mood, muscle and immune-related wellness conversations.
- Vitamin B12 and folate: these B vitamins are commonly tracked alongside nerve, red-blood-cell and cognitive wellness. Levels are particularly worth looking at for vegetarian, vegan and older adults.
- HbA1c: HbA1c reflects your longer-term blood-sugar balance. It is a useful marker to include in a broad wellness panel because metabolic-health context is often relevant to energy, weight and cardiovascular wellness conversations.
A panel that includes thyroid markers, iron studies, vitamin D, vitamin B12 and HbA1c covers the body-system markers that come up most often across the symptoms on this page. If you want to look at hormonal markers as well, adding testosterone, SHBG and FSH gives a fuller hormonal picture to discuss with your doctor.
Track What Your Body Is Reflecting
Choose a wellness panel that fits the markers you want to look at, or let our quiz suggest one. At-home collection, doctor-reviewed results, and clear personalised commentary.
Browse Blood TestsTake the QuizFrequently Asked Questions
Can I order a wellness panel without seeing a GP?
Yes. You can order an at-home test kit from Lola Health without a referral. Your result is reviewed by a GMC-registered doctor and returned with personalised commentary. If anything is worth following up on, you can share your result with your GP.
Which panel should I choose if I have multiple symptoms?
Most everyday symptoms share overlapping body-system markers. A broad wellness panel that covers thyroid activity, iron studies, vitamin D, vitamin B12 and HbA1c addresses the markers that come up most often. If your interests are primarily hormonal (irregular periods, low libido, skin changes), add a hormone panel that includes testosterone, SHBG and FSH.
How accurate are at-home finger-prick samples?
Your sample is analysed at our UKAS-accredited (ISO 15189) UK partner laboratory. Finger-prick collection has been validated against venous draws for the markers we cover, and every result is reviewed by a GMC-registered doctor before release.
How quickly will I get my results?
Most results are available within 2 to 5 working days after your sample reaches the laboratory. You will receive an email when your result is ready and can view it online with doctor commentary.
Do I need to fast before my sample?
Most panels do not require fasting. If your chosen panel includes fasting glucose or a lipid panel, we recommend collecting your sample first thing in the morning before eating. Instructions are included with every kit.
What if my result is outside the reference range?
Every result outside the reference range is accompanied by a doctor's commentary explaining what your wellness panel is reflecting. For findings worth following up on, we recommend booking a conversation with your GP and sharing your Lola result with them.
How is Lola Health different from other wellness-testing companies?
Lola Health uses a UKAS-accredited UK partner laboratory, every result is reviewed by a GMC-registered doctor with personalised commentary, free next-day delivery is included, and the focus is on actionable wellness insight rather than vanity metrics. All samples are processed in the UK.