Fix your low energy
Diagnostic testing, clinicians, and AI working together to help you deeply understand your low energy and how to improve it.
Low energy manifests in different ways
Low energy isn't just something you have to live with. It's your body telling you something isn't right, even if your bloods came back 'normal’.
Meet Calibre
We bring the kind of personalised health intelligence previously available only to elite athletes and the ultra-wealthy to you
Know exactly what's driving your energy and long-term health
A comprehensive health audit: a tailored blood test, 5 days of lifestyle tracking, your health and family history. So you baseline your energy today with the Calibre Energy Score, and your long-term risk with the markers standard checks miss.
Your bloods, your lifestyle, your history, integrated in one place and interpreted together by your dedicated doctor and causal AI who know your story. A holistic health assessment, not isolated results.
Most optimisation advice tells you what usually works. We help you unlock the few specific levers that work for you, and most likely move your energy, recovery and long-term health.
Our members shifted from guesswork to clarity
Faheem
,
36
Business Owner
We decoded what actually drives your energy
Calibre maps how your hormones, metabolism, sleep, inflammation, and mind interact to drive your energy. Calibre ends the health guesswork.
Your plan adapts with you
As your health picture sharpens over time, so do our recommendations and your energy levels.
Week 1
Energy audit & baseline diagnostics
Week 3
Health assessment
Month 3
First check-in
Month 6
Additional deeper look
Month 12
Annual review
50+ biomarker panel chosen for you. Blood work, wearable integration, lifestyle intake, health history.
Your doctor walks you through your results. You build the plan together.
Your doctor reviews your progress. Lifestyle tracking and Energy Score re-measured to see what's actually shifted. Plan evolves based on your real data.
Advanced testing where it earns its place — DEXA, VO₂ max, continuous glucose monitoring, hormone panels.
Full re-test. A full year of trajectory data. You see exactly how much you've moved.
I built Calibre because my energy tanked and I couldn't get it back.
"
How we compare
Coffee, supplements, another sleep gadget. They mask the symptoms. Calibre finds the cause.
50+ biomarkers tested regularly and interpreted in your full context
Wearables integration + 5 days of lifestyle tracking, joined up
A dedicated doctor who knows your story
A tailored plan focusing on what matters most that evolves with you
Frequently asked questions
I've already tried Thriva or Neko. How is Calibre different?
Those services give you data. Calibre is designed to deliver outcomes. That’s why we have personalised blood tests, and assess your lifestyle, health history and wearable data in order to build the complete picture of your health. This is joined up and reviewed by a dedicated doctor who provides you with a holistic health assessment and then builds a plan around the 2 to 3 specific things actually driving your energy and long-term health. Not another dashboard to decode alone.
What if I've already tried more sleep, less caffeine, and supplements?
You're not alone. Most Calibre members have already tried what generic advice recommends. That's why we don't start with generic advice. We start with your specific context and data, find what's actually driving your energy, and build a plan around the 2 to 3 things that matter for your body. The cause of low energy often differs from person to person.
How long until I feel a difference?
Most members report noticeable improvements within 4 to 8 weeks. Meaningful change in your biomarkers typically shows in the first re-test at month 6. Your Energy Score is remeasured every quarter so you can see progress objectively, not just how you feel on any given day. Results may vary and will also depend on you implementing the plan.
Do I need to give up coffee, alcohol, or my current routine?
Maybe. Calibre isn't a restrictive protocol. Your dedicated clinician looks at what you're currently doing and identifies the specific changes that will move your energy for your body. Often it's not what people expect. One member's energy improved by swapping white rice for sweet potatoes. Another's by reducing high intensity cardio. We will show you the full picture and provide you with different choices on how to improve your energy.
What if my results indicate something serious?
Your dedicated doctor reviews every result. If anything requires urgent attention or specialist input, we'll flag it immediately and provide a GP referral letter for onward care. Calibre works alongside NHS care, and is not a replacement for primary or acute care.
Where do I get my blood drawn?
We partner with clinics across London, giving you a choice of locations and flexible appointment slots.
Why £39 a month? What's included?
Everything. Your 50+ biomarker panel, your dedicated doctor, quarterly reviews, five days of lifestyle tracking every quarter, wearable integration, your Calibre Energy Score, your personalised plan, advanced testing where indicated (DEXA, VO₂ max, CGM, hormone panels). No upsells. No supplement commissions. Comparable care assembled separately would cost around £5,000 a year.
My GP said my bloods are normal. Can Calibre still help?
Yes. Standard NHS panels are designed to detect disease, not to identify what's driving your energy or what’s optimal for you. Being within reference range doesn't mean your body is running at its best. Calibre tests specific markers most GPs don't run, including leptin, fasting insulin, Free T3, ApoB, and interprets them in the context of your full picture, so we can find what's driving your energy even when your bloods look fine.
Can I pause or cancel my membership after I sign up?
Yes to both. If you need to pause or cancel your membership for any reason, just reach out to us via WhatsApp, and we'll sort it out.
Is my data secure, and how is it handled?
We are privacy-first by design, and our data practices are built to meet the latest UK data protection and GDPR standards. We follow CQC-regulated policies that apply to UK clinical care providers.
Your health data is only accessible to you and your clinical team. It is not shared beyond that without your explicit consent, except where legally required.
See our privacy policy or email us at privacy@getcalibre.com.
Got more questions?
Talk to us
If you'd rather speak with someone before joining, book a 15-minute call with a member of our team.
