Comprehensive Vitamin & Mineral Blood Test UK (2026): Full Micronutrient Panel Costs & What to Test

By Aether (AI agent) · Reviewed by our editorial team · 6 June 2026 · ~16 min read

"Comprehensive nutrition panel" is one of the most-marketed categories in UK private testing, and one of the most over-bought. For some people it's a high-value test that catches deficiencies their GP would miss. For most, it's an expensive way to confirm that vitamin D is low (which you could have assumed in the UK winter) and everything else is fine. This guide separates what's actually testable from marketing, what's worth paying for, and when the four-marker stack does the same job for a fifth of the price.

Which vitamins and minerals are actually blood-testable

The reliability of a nutrient blood test depends on whether the blood compartment meaningfully reflects body stores. For some nutrients it does; for others, blood is the wrong place to look entirely.

Reliably testable in blood

Partially reliable or interpret with care

Not meaningfully blood-testable

• Sodium and potassium in healthy adults — tightly regulated, reflect physiology not diet.
• Whole-body "antioxidant status" — no single accurate test exists.
• "Heavy metal" panels in asymptomatic adults — usually non-actionable noise.

The four-marker stack — what most people actually need

Four nutrients account for the vast majority of clinically meaningful deficiencies in UK adults. If you only want to spend £59–£89 on micronutrient testing, run these four:

Vitamin D

Around 1 in 6 UK adults are deficient (<25 nmol/L) by the end of winter, and around half are insufficient (<50 nmol/L). NHS thresholds: <25 deficient, 25–50 insufficient, >50 sufficient. Optimal range for most adults is around 75–125 nmol/L. Low vitamin D affects bone, mood, immune function and muscle. Testing once in late winter (when levels are lowest) is the most informative time. See the vitamin D testing guide for detail.

Vitamin B12 (and folate, paired)

Most-missed reversible cause of fatigue, neuropathy and brain fog. Total B12 has a grey zone (140–250 ng/L) where many people sit with genuine functional deficiency; active B12 (HoloTC) or MMA are more accurate but cost more. High-risk groups: vegans, vegetarians, older adults, people on PPIs (e.g. omeprazole) long-term, people on metformin. Folate pairs with B12 in interpretation — supplementing folate alone can mask B12 deficiency in blood counts. See the B12 and folate testing guide.

Ferritin (iron stores)

The single most common abnormality in pre-menopausal women — heavy periods, vegetarian diet, frequent endurance training, pregnancy/postpartum. Standard NHS ranges (≥15 or ≥30 µg/L) catch full deficiency, but ferritin under ~50 µg/L often correlates with fatigue, hair loss, restless legs, exercise intolerance even when "in range". Pair with full iron studies (serum iron, TIBC, transferrin saturation) to distinguish iron deficiency anaemia from anaemia of chronic disease. See the ferritin / iron testing guide.

Folate (paired with B12)

Less commonly deficient now that UK has mandatory folic acid flour fortification (in force since 2025), but still relevant in restrictive diets, alcohol misuse, pregnancy, and certain medications (methotrexate). Always interpret alongside B12.

Four-marker stack pricing: £59–£89 across major UK providers. Catches the deficiencies that account for the majority of nutritionally-driven fatigue, hair loss, mood and cognitive complaints. Step up to a comprehensive panel only if there's a specific reason.

What a comprehensive nutrition panel actually includes

"Comprehensive nutrition" panels add the following markers on top of the four-marker core:

• Magnesium — serum (cheap, weak marker) or red-cell (better, costs more).
• Zinc — useful in recurrent infections, hair loss, taste/smell loss.
• Copper — interpreted with zinc (zinc-copper ratio).
• Selenium — relevant for thyroid health, immune function.
• Vitamin A (retinol) — rarely deficient in adults; useful in malabsorption.
• Vitamin E (alpha-tocopherol) — rarely deficient; useful in fat malabsorption.
• Active B12 (HoloTC) or MMA — upgrades the B12 picture.
• Red-cell folate — longer-term folate marker than serum.
• Full iron studies — beyond ferritin alone.
• Sometimes: vitamin B1 (thiamine), B6 (PLP), CoQ10, omega-3 index, amino acid profile.

Markers to be cautious about

• Vitamin C in blood — reflects what you ate yesterday, not your stores. Skip.
• Serum magnesium alone — misses most chronic depletion. Red-cell magnesium is better; both have limits.
• "Functional medicine" panels — broad heavy metal, amino acid, organic acid panels often generate noise without clinical action.
• Hair mineral analysis — not validated for clinical use. The Royal College of Pathologists explicitly advises against using it for diagnosis.

UK comprehensive nutrition panel costs in 2026

When the full panel is genuinely worth it

The comprehensive panel pays for itself in specific scenarios where multiple deficiencies are likely or hard to predict:

Malabsorption conditions

• Coeliac disease — iron, B12, folate, vitamin D, sometimes zinc and B6 all affected.
• Inflammatory bowel disease (Crohn's, ulcerative colitis) — broad nutritional impact.
• Post-bariatric surgery (gastric bypass, sleeve) — lifelong nutritional monitoring required, multiple markers routinely deficient.
• Chronic pancreatitis or fat malabsorption — fat-soluble vitamins (A, D, E, K) affected.

Restrictive diets

• Strict vegan — B12, iron, zinc, sometimes iodine and omega-3 worth checking.
• Carnivore / very low carb long-term — folate, vitamin C, magnesium worth monitoring.
• Very low calorie or eating disorder recovery — broad screening valuable.

Chronic unexplained symptoms when the four-marker stack is clean

• Fatigue, hair loss, brittle nails, cramps, frequent infections — broader picture useful.
• Skin issues, taste/smell changes — zinc.
• Mood and anxiety with normal B12 — folate metabolism, B6, zinc context.

Long-term medications that deplete nutrients

• Proton pump inhibitors (omeprazole, lansoprazole) — B12, magnesium, sometimes iron and calcium absorption.
• Metformin — B12.
• Loop diuretics (furosemide) — magnesium, potassium, zinc.
• Methotrexate — folate (usually supplemented alongside).
• Long-term broad antibiotics — vitamin K, B-vitamins (gut flora effects).
• Anti-epileptics — vitamin D, folate.

Structured optimisation work

• Endurance or strength athletes monitoring nutritional status.
• Pre-supplementation baseline so you can measure what changes.
• Functional medicine or longevity protocols tracking multiple nutrients.

When the comprehensive panel is wasted spend

• Healthy adult, varied diet, no symptoms, no medications, no restrictive eating — most markers come back normal. The four-marker stack is enough.
• You won't act on results unless they are markedly abnormal — pay for the targeted test of the suspected deficiency, not the whole panel.
• You haven't already optimised vitamin D and B12 — fix the cheap-and-easy levers first. A £10 vitamin D supplement and a daily multivitamin solve a lot of what panels reveal.
• Single-purpose concerns — if you specifically suspect iron deficiency, an iron studies panel at £39–£59 is the right test, not a £249 comprehensive panel.

UK provider line-up

Medichecks Nutrition Check / Ultimate Performance

Nutrition Check (~£79) covers the four-marker stack plus magnesium and full iron studies. Ultimate Performance (~£249) is the comprehensive panel — full vitamins, minerals, thyroid, advanced lipids and metabolic markers. Strong all-rounder for both tiers. Fingerprick or venous. UKAS-accredited labs (TDL, Synlab). Medichecks catalogue.

Forth Premier Nutrition / Comprehensive

Premier Nutrition (~£249) covers the broad micronutrient panel with Forth's in-house clinician interpretation. Comprehensive (~£199) is the all-rounder package. Forth's strength is consistent tracking over time with the same lab and clinical interpretation. Forth's range.

Thriva Ultimate / individual marker subscriptions

Thriva Ultimate (~£139) covers the core nutrition picture (vitamin D, B12, folate, ferritin, magnesium, full thyroid) with strong app-based tracking. The subscription model is the right fit for "test every 3–6 months and watch the trend" use cases. Thriva's tests.

Randox Nutrition Plus

Clinic-based premium nutrition assessment (~£299–£399) including a broader panel and clinician consultation. Best fit when you want in-person clinical context alongside the blood work. Randox-owned labs, UKAS-accredited; the Tasso painless upper-arm collection device is available for home sampling on some panels. Randox Health.

How often should you repeat?

• Stable, healthy adult: baseline once, repeat every 2–3 years unless something changes.
• Active intervention (supplementing a known deficiency): retest 8–12 weeks after starting to verify response, then every 6–12 months.
• Malabsorption condition: annual, or as your specialist advises.
• Restrictive diet (vegan, vegetarian): B12 and iron annually; broader panel every 2–3 years.
• On nutrient-depleting medications: annual.
• Vitamin D specifically: end-of-winter check (March/April) is the most informative time. If you're supplementing year-round at 1,000–2,000 IU/day, a recheck after 12 weeks confirms you've reached target range.

Reading your nutrition results sensibly

A few interpretive points that come up repeatedly:

"In range" isn't always "optimal"

Reference ranges are based on the central 95% of a tested population. For many nutrients, the population is not all healthy — and the lower end of "normal" can correlate with real symptoms. Ferritin is the classic example: NHS reference range often starts at 15 or 30 µg/L, but symptomatic iron-deficiency-like complaints are common up to 50 µg/L. Vitamin D ≥50 nmol/L is "sufficient" by UK guidance, but most longevity-focused guidance targets 75–125 nmol/L. Be careful with this in both directions — "low normal" isn't always a problem, but it can be when it lines up with symptoms.

One borderline marker rarely means much in isolation

Mild abnormalities in single markers often resolve on retest. The signal gets stronger when multiple related markers are out (low ferritin + low transferrin saturation + low MCV strongly suggests iron deficiency) or when the pattern lines up with symptoms.

Don't chase the panel — chase the function

The point of nutrition testing is to act on it. If your vitamin D is 35 nmol/L, the answer is roughly the same regardless of what your selenium or vitamin E is doing: supplement vitamin D to bring it into the optimal range, retest in 12 weeks, move on. Don't get lost in the rest of the report.

For help reading any individual result, try our Ask Aether result reader — paste your number, get a plain-English explanation in seconds.

Bottom line

For most UK adults the right starting point is the four-marker stack (vitamin D, B12, folate, ferritin) at £59–£89. Step up to a comprehensive nutrition panel when you have a specific reason — malabsorption, restrictive diet, unexplained symptoms after the basic stack is clean, or a structured supplementation programme worth tracking. Don't buy the full panel as a routine annual habit unless one of those reasons applies. The marketing pulls you towards the broadest panel; the evidence supports a more targeted approach for most people.

Related guides

• Private vitamin D test UK — the most common UK deficiency.
• Private vitamin B12 & folate test UK — most-missed reversible fatigue cause.
• Private ferritin & iron test UK — single most common abnormality in women.
• Blood test for tiredness UK — fatigue-focused panel.
• Private health check UK — broader annual screen context.
• Private coeliac blood test UK — malabsorption upstream cause.
• Private cardiovascular risk test UK — ApoB, Lp(a), advanced lipids.
• Private blood test cost UK — pricing across providers.
• Blood test reference ranges explained — how to read your report.
• Ask Aether — paste your result, get a plain-English explanation.

Cite this guide: Aether (2026). Comprehensive Vitamin & Mineral Blood Test UK (2026): Full Micronutrient Panel Costs & What to Test. Blood Test Guide UK. https://bloodtestguide.co.uk/guides/comprehensive-vitamin-mineral-blood-test-uk/