Vitamin B12 test from home
Measure vitamin B12 plus 9 more blood values from home. Nearly painless upper-arm sample, certified lab, physician-developed interpretation. €99, no subscription.
GDPR · Art. 9 data separation- Physician-developed protocol
- Accredited lab: Limbach Gruppe
- Class I medical device (CE)
- FDA-cleared device
- All from home
- Evidence-based methodology
Vitamin B12 (cobalamin) - your B12 value
The test measures your vitamin B12 (cobalamin) in blood - the vitamin your body needs for red blood cell formation, nervous-system function, and cell metabolism. Because the body cannot make it, B12 comes from your diet (mainly animal foods) or from supplementation.
Your B12 value reflects your current supply from intake and absorption. Because the liver stores large amounts, a deficiency often develops slowly and is easy to miss early on - which is exactly what makes a baseline check useful.
Where your value sits
Commonly cited thresholds for orientation. They differ between labs and assays - your CHIRAYOU report uses the range reported by the analysing lab and puts it in context using a physician-developed protocol.
What your B12 value reflects
Your B12 value reflects your current supply from diet and absorption. The thresholds are for orientation; for borderline results, B12 status is sometimes confirmed with methylmalonic acid (MMA).
You get your B12 value as a concrete, lab-analysed number, clearly placed against these ranges. The thresholds are for orientation, not a diagnosis - and for very low results or persistent symptoms, your report flags when it's worth talking to a doctor.
Why a B12 value is worth knowing
B12 comes almost exclusively from animal foods, and absorption can decline with age or with certain medications. A concrete value brings clarity instead of guesswork - especially read alongside your other blood values.
Easily missed
A B12 deficiency often develops slowly and goes unnoticed at first. A value surfaces it early.
Matters for energy & nerves
B12 is central to blood formation and the nervous system - both of which affect energy and concentration.
More meaningful in context
Read alongside vitamin D, inflammation and metabolism, your B12 value says more than a single number on its own.
When a B12 status check can be informative
B12 comes almost exclusively from animal foods, and absorption can decline with age or with certain medications. A status value gives you a concrete number instead of guesswork.
Plant-based diets
Vegan and largely vegetarian diets provide little B12 without supplementation - a status value brings clarity.
Absorption in focus
With age, low stomach acid, or long-term use of PPIs or metformin, B12 absorption can drop.
Energy & focus
If you're wondering whether B12 plays a role in fatigue or concentration, a value is a sensible starting point for a conversation with your physician.
You get a concrete status value to start from - not a diagnosis. If you have symptoms or notable results, your report shows when it's worth discussing them with a doctor.
Why B12 should rarely be viewed completely alone
Your B12 value answers an important question - but fatigue or low energy have many possible causes. That is why CHIRAYOU measures vitamin B12 plus 9 more blood values - so your value sits in context, not in isolation.
Vitamin D (nutrient)
25-OH vitamin D - your vitamin D storage value, and the second commonly underestimated nutrient value.
hsCRP (inflammation)
A sensitive marker that surfaces silent, low-grade inflammation in the background.
Fructosamine (blood sugar)
Average blood sugar over the past 2–3 weeks - metabolic health alongside your nutrient status.
B12, vitamin D and the broader picture belong together for many people. Explore the matching tests:
Single B12 test vs. the CHIRAYOU 10-value baseline test
A single home test often gives you just one B12 number to interpret yourself. The CHIRAYOU baseline test measures your vitamin B12 plus 9 more blood values - collected with a nearly painless upper-arm device and read together, using a physician-developed protocol.
Single B12 test
Vitamin B12 + 9 more blood values
Will I still get my B12 value?
Yes, absolutely. You get your vitamin B12 value - analysed in a certified lab and explained in plain language. CHIRAYOU simply isn't a single-marker test: from the same sample you also get your B12 value plus 9 more blood values at one flat price - so your value sits in context, not in isolation.
10 blood values - with vitamin B12 at the centre
Your vitamin B12 plus 9 more blood values from a single sample. B12 is highlighted here - the other markers provide the context.
From your front door to your B12 value
No vein needle, no appointment, no waiting room. A few minutes from home.
Everything arrives in one kit
Tasso+ device, step-by-step instructions and a prepaid return envelope. Free shipping, nothing else to buy.
Stick it on your upper arm, press the button
A gentle vacuum draws a few drops of capillary blood into a small tube. No vein needle, no finger prick - most people barely feel it.
Seal the tube, drop it in any mailbox
The envelope is addressed and postage-paid. Your sample goes straight to Limbach Gruppe, a DAkkS-accredited German lab.
Lab-verified results in your app
Your vitamin B12 plus 9 more blood values, each set against its reference range - explained in plain language, with clear next steps.
The Tasso+, in short: fits in your palm and sticks on like a patch · one button, a gentle vacuum fills the tube · no lancet, no needle in a vein
Analyzed in a DAkkS-accredited lab. Physician-led.
The convenience does not come from a softer lab. It comes from cutting out the clinic visit - not the rigor behind the result.
“My goal is to slow aging and support a healthy, radiant appearance. Healthy aging means a state in which the number of healthy, active years comes as close as possible to the biological lifespan.”
Approbiert in Germany. Results that fall clearly outside the reference range are flagged in your app with a recommendation to consult your GP. For a personal physician review on each result, see the CHIRAYOU Program.
Limbach Gruppe - DAkkS-accredited German lab
Your sample is analysed by Limbach Gruppe, one of Germany's largest medical laboratory networks - the same accreditation a clinic venous draw uses. Validated stability window for at-home capillary samples in transit.
Free replacement if your sample fails QC
Too little blood, damaged in transit, missed the stability window? We send a new kit. You do not pay again.
€99. Everything included. No subscription required.
The CHIRAYOU B12 test includes everything you need: at-home kit, upper-arm Tasso+ collection, lab analysis, your vitamin B12 plus 9 more blood values, a digital report, and interpretation built on a physician-developed protocol.
CHIRAYOU At-Home Vitamin B12 Blood Test
- At-home test kit
- Tasso+ upper-arm collection
- Vitamin B12 - your B12 value
- 9 more blood values for context
- Lab analysis + digital report
- Digital results in the app
- Shipping to you and return to the lab included
- Replacement kit if the sample can't be analyzed
Optional doctor consultation. Prefer to go through your results with a physician? Add an optional 20-minute video consultation at checkout (+€50).
Secure payment via Stripe · Free shipping to you & back to the lab
Per blood value, a fraction of a single lab test such as vitamin D (~€40) - 10 lab-analyzed values from one sample.
See the full cost breakdownCommon questions about the B12 test
Short, clear answers on your B12 value, cost and the at-home process.
Know your B12 value - in the right context
Vitamin B12 plus 9 more blood values. Collected at home, analysed in a certified lab. €99 flat price.