Medichecks has the widest catalogue in UK private blood testing — 300+ individual tests. Forth has a custom panel builder and a fitness-first approach. Both use UKAS-accredited labs, both offer finger-prick and venous draw, and both top out at roughly 50-60 biomarkers. This comparison covers where each wins, where they overlap, and when neither is enough.
Prices verified August 2026. Medichecks runs frequent 20-30% sales. Confirm at each provider's website before ordering.
You want the widest catalogue — 300+ individual tests covering specialist markers like cortisol rhythm, cancer markers (PSA, CA-125), coeliac screening, and allergy panels. You want a one-off test without subscription pressure. You want to catch a Mega Monday sale and get 20-30% off. You need a very specific marker that smaller providers don't offer.
Maximum ~59 biomarkers per panel. Venous draw costs £25-59 extra. GP comments can feel generic. Trustpilot rating is lower than competitors (3.8/5). No custom panel builder — you pick from pre-built options.
You train seriously and want sport-specific panel groupings (inflammation, recovery, testosterone, cortisol, iron, B12, vitamin D). You want to build your own custom panel by picking individual biomarkers. You want HealthCoach AI scoring that converts results into actionable next steps. You care about 2-day turnaround.
Smaller catalogue than Medichecks. Maximum ~50 biomarkers. Venous draw is £45 extra and only available at select locations. No tumour markers, immunoglobulins, or advanced metabolic markers. The custom panel builder is useful but still limited to the markers Forth offers.
Medichecks and Forth serve different audiences — one generalist, one athlete-focused — but they share the same depth limitation. Both top out at roughly 50-60 biomarkers per panel. Neither includes the markers that separate a basic health check from a comprehensive one:
Tumour markers (CEA, CA 19-9, PSA, CA-125, CA 15-3), immunoglobulins (IgG, IgM, IgA, IgE), coeliac screening (anti-tTG), Lp(a) for genetic cardiovascular risk, fasting insulin with HOMA-IR for insulin resistance, cystatin C for creatine-independent kidney function, rheumatoid factor, full thyroid antibodies (Anti-TPO and thyroglobulin together), and parathyroid hormone.
For a basic check of thyroid, cholesterol, liver, iron, and vitamins, 50-60 markers is adequate. For a genuine comprehensive health screen — the kind that catches what you don't know to look for — the ceiling matters. What a full body health check should include.
Medichecks
~59
biomarkers
Forth
~50
biomarkers
TrueVitals
114
biomarkers
TrueVitals Ultimate: £349 + £19 phlebotomy = £368 all-in. Professional venous draw at 103+ UK clinics or at home for £39. AI-powered cross-system report with medical professional review. Results in 48 hours. No subscription. Full comparison of all UK providers.
114 biomarkers. Professional venous draw at 103+ UK clinics for £19. AI-powered cross-system reporting. Results in 48 hours. No subscription. No finger-prick.
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