Vitamin B12
Receive actionable insights and deep analysis—not just lab values– in as little as 48 hours
Clear guidance, and follow-up care available
Simple, online scheduling for labs and everything else
Most insurance accepted
Board-certified
No hidden fees
Available nationwide
What is a Vitamin B12 Test?
Deficiency detection and anemia evaluation
Low B12 impairs red blood cell production, causing megaloblastic anemia — characterized by large, dysfunctional red cells. B12 testing distinguishes this from other anemia types and identifies deficiency at a stage where treatment prevents neurological progression.
Neurological and cognitive symptoms
B12 deficiency can cause peripheral neuropathy, balance problems, memory changes, and mood disturbance — sometimes before anemia develops. Testing is an important step in any evaluation of unexplained neurological symptoms, particularly in older adults and people with absorption risk factors.
High-risk group monitoring
People with pernicious anemia, Crohn's or celiac disease, gastric surgery, long-term metformin use, or a vegetarian or vegan diet are at elevated risk. Regular testing confirms that dietary intake or supplementation is maintaining adequate levels over time.
Complete insights in as little as 48 hours
1
Book your test
Instantly schedule at 2,000+ labs nationwide, at a time that works for you. Most visits take 15 minutes or less, with both walk-ins and appointments available.
2
Get results in 48 hours
Your results are delivered quickly—and reviewed by medical professionals. You’ll get clear explanations, robust health insights, and recommended next steps tailored to your health needs.
3
Take action with physician guidance
Choose to review your results and manage your plan with a General Medicine physician—or simply use the insights on your own.
4
Track progress over time
Repeat annually to see trends, improvements, and new emerging risks or book individual tests that focus on your set goals
All your care in one place. That’s the General Medicine difference.
We help you understand your options, connect you to the right clinicians, manage prescriptions, coordinate any needed evaluations, and keep an eye on your overall health along the way. It’s comprehensive care that looks at the full picture — your goals, your history, your lifestyle — and makes it simple to move forward with confidence.
What's included
Test type
Blood sample
Collection method
Venipuncture
Fasting
Required
Results processing time
1 to 3 days
Vitamin B12
An essential vitamin that supports nerve health, energy production, and red blood cell formation. Deficiency can lead to fatigue, mood changes, and neurological issues.
Ongoing support, always available.
You’ll be supported by experienced clinicians who care for a wide range of health needs, from everyday concerns to more complex conditions.
Our clinicians track your progress over time and adjust your care as needed. If medication is prescribed, we’ll manage dosing and monitor for side effects. If lab testing is recommended, we review results and refine your plan accordingly. You’re never left to navigate care on your own.
What our customers have to say
Hear from people who felt heard, understood, and supported on General Medicine.
“I found the ease of setting the appointment and how quickly I was able to be seen to be amazing. The physician was very friendly and amazingly helpful.”
Natalie, Texas
“The chat visit was super convenient. The doctor was friendly and took the time needed to answer any questions I had. The prescription I needed was called in and ready the same afternoon.”
Dustin, Tennessee
“I loved my General Medicine experience. It gave me peace of mind to know someone cared and I felt they listened to what I was saying.”
Ann, Florida
“General Medicine is easily the most approachable, efficient, high-quality, and responsive care team I've had the pleasure of working with.”
John, Utah
“General Medicine helped me get the imaging and blood work I needed, referred me to the right specialists, and even helped me find a new family doctor.”
Bridget, Mississippi
Dive deeper: get the support you need to action against your goals
Explore additional services designed to go deeper, treat identified risks, or support specific health goals. General Medicine makes it easy to take the next step.
