Vitamin B12 Shots in Irvine
Vitamin B12 and B-complex injections at The Pur Health in Irvine. A quick visit: the injection takes a few minutes.
Last updated October 2026
What vitamin B12 does
Vitamin B12 helps keep your blood and nerve cells healthy and helps your body make DNA. Without enough of it, people can develop megaloblastic anemia, a blood condition that makes people tired and weak.
B12 comes naturally from animal foods such as fish, meat, poultry, eggs and dairy. To absorb it, your body needs stomach acid and a protein made by the stomach called intrinsic factor, which is why some people run low even when they eat enough.
Who is more likely to run low on B12
- Adults over 50, who often have less stomach acid to absorb B12 from food
- People with pernicious anemia or atrophic gastritis
- People who have had stomach or intestinal surgery, including weight-loss surgery
- People with celiac disease or Crohn's disease
- Vegetarians and vegans
- People taking metformin
- People taking acid-reducing medicines such as omeprazole (Prilosec) or lansoprazole (Prevacid)
Signs of low B12
Low B12 can make you feel tired or weak. It can also cause pale skin, heart palpitations, loss of appetite, weight loss, numbness or tingling in the hands and feet, problems with balance, depression, confusion, poor memory, and a sore mouth or tongue.
Your body stores a large supply of B12, so symptoms can take years to appear. Low B12 can damage the nerves even without anemia, which is why it is worth finding and treating early.
How low B12 is checked and treated
A blood test shows your B12 level, and Dr. Munib can order it. A prescription B12 shot is usually used to treat B12 deficiency. Pernicious anemia is usually treated with B12 shots, although very high doses by mouth might also work.
B12 is often promoted for energy and endurance, but it does not provide those benefits in people who already get enough B12. B12 has not been shown to cause harm, even at high doses.
What the visit looks like
A vitamin B12 or B-complex shot is a quick visit at The Pur Health in Irvine. The injection is given into the muscle of the upper arm or buttock, takes a few minutes, and you can go back to your day right after.
If you would like your B12 level checked, Dr. Munib can order a blood test.
Ask us at your visit how often to repeat it.
Cost
The price of each shot is shown in the booking window before you book.
B12 shot vs B-complex shot
Vitamin B12 is one vitamin. B-complex is a mix of B vitamins. Both are given here as quick injections into the muscle. If you want to know whether you are actually low on B12, Dr. Munib can order a blood test.
B12 shots near me in Orange County
B12 and B-complex shots are given at The Pur Health, 114 Pacifica, Suite 280, Irvine, CA 92618, for patients from Irvine, Newport Beach, Tustin and across Orange County. A quick visit: the injection takes a few minutes, and the price is shown in the booking window before you book.
Sabeen Munib M.D.
MD · Residency at the University of Minnesota
Dr. Munib has cared for patients in Irvine and Orange County for more than 15 years. She focuses on preventive care, chronic disease management and whole-person wellness, and she takes the time to explain what she finds.
- Speaks Urdu and Hindi; our team also speaks Arabic, Farsi and Tagalog
- Sees adults and teens 12 and older
What our patients say
“I've been with Dr.Munib for nearly 10 years and she's been absolutely incredible. She's always available and goes out of her way to help. She's incredibly responsive and has helped me with issues that other specialists couldn't solve. It's so important to have a doctor who is always there for you and goes above and beyond to help and I found that with Dr.Munib. I can't recommend her enough! She's simply amazing.”
“Dr. Munib is an amazing doctor. She listens to your health concerns and addresses them right away. She is very kind and takes her time to listen and explain everything. I’ve always been anxious to visit a doctor’s office, so I’m glad I found Dr. Munib because she is the best!”
“Dr. Munib is a wonderful doctor, always listening and giving spot-on diagnosis, she does not steer us wrong. No nonsense and to the point. My family and I truly appreciate her as a doctor.”
Frequently asked questions
Questions are welcome. Our team is happy to help before you book.
Call (949) 647-5234Who needs a B12 shot?
A prescription B12 shot is usually used to treat B12 deficiency. Dr. Munib can check your level with a blood test.
Who is more likely to have low B12?
Adults over 50, people with pernicious anemia, people who have had stomach or intestinal surgery, people with celiac or Crohn's disease, vegetarians and vegans, and people taking metformin or acid-reducing medicines.
Will B12 give me more energy?
Not if you already get enough B12. B12 is often promoted for energy, but it does not provide that benefit in people who are not low.
Can B12 be harmful?
B12 has not been shown to cause harm, even at high doses.
Where is the B12 shot given?
At The Pur Health, 114 Pacifica, Suite 280, Irvine, CA 92618.
Do I need labs first?
No. A shot is a quick visit.
How much does it cost?
The price is shown in the booking window before you book.
Is a B12 shot better than a B12 pill?
For people who cannot absorb B12 well, such as those with pernicious anemia, shots are usually used. Very high doses by mouth might also work for some people.
Can I get a B12 shot if I take metformin or acid reducers?
Yes. These medicines can lower B12 over time, so a blood test to check your level is a good idea. Dr. Munib can order it.
Do you offer Lipo-B12 or MIC shots?
Lipo-B12 is given at our sister practice, Spectrum Skin Clinic. Plain B12 and B-complex shots are given here.
Can I get a B12 shot near Newport Beach?
Yes, at our Irvine office, 114 Pacifica, Suite 280, a short drive from Newport Beach.
Have any Questions? Feel Free To Contact Sabeen Munib M.D.
Get in touch and our team will call or email you. You can also call (949) 647-5234.