B-12 Shots

Coastal Primary Care

Kazi Rezai, DO

Addiction Treatment Center & Anti-Aging & Hormone Specialist located in Huntington Beach, CA

Vitamin B12 shots provide a safe and effective way to address potentially serious issues like fatigue, weight gain, and nutritional deficiencies. At Coastal Primary Care, Kazi Rezai, DO, uses B12 shots to help adults feel their best. To make an appointment at the practice in Huntington Beach, California, call the office to speak with a team member, or request an appointment online today.

B-12 Shots Q & A

What are B12 shots?

A B12 shot is a nutritional injection that Dr. Rezai administers into a muscle, usually upper arm or mid-thigh. It can restore your body to balance or help address certain health problems like weight gain and low energy. 

What is vitamin B12?

B12 is a water-soluble vitamin that plays an important role in the production of red blood cells and DNA. 

Your body stores vitamin B12 in the liver, so it can take a long time for symptoms of a deficiency to develop. Even so, B12 deficiencies are common. They affect up to about 90% of vegans and vegetarians, because vitamin B12 is only found in animal products.

What are the symptoms of vitamin B12 deficiency?

Symptoms of a vitamin B12 deficiency include:

  • Fatigue (Anemia)
  • Loss of Muscle Strength
  • Shortness of breath
  • Poor balance
  • Numbness
  • Forgetfulness
  • Pins & Needles Sensation
  • Pale Skin
  • Dizziness
  • Anxiety
  • Depression
  • Changes in the Tongue
  • Vision Changes / Blurry Vision
  • Decreased Taste Ability

What issues can vitamin B12 shots help treat?

At Coastal Primary Care, Dr. Rezai uses B12 shots to treat various issues, including:


Vitamin B12 plays a crucial role in providing energy to your cells. If you’re deficient, you might feel exhausted during your workday, even if you get a good night’s sleep. B12 shots can restore your body to balance, helping you feel refreshed.


Osteoporosis is a disease that causes your bones to weaken and break. One of the most common causes of low bone volume is vitamin B12 deficiency. Some evidence suggests B12 shots can strengthen your bones.

Weight gain

As you age, your metabolism slows down, making it increasingly difficult to lose weight. Vitamin B12 shots can help kick your metabolism into gear. When combined with exercise and good nutrition, it’s possible to achieve your wellness goals. 

Could I benefit from vitamin B12 shots?

To determine if you might benefit from B12 shots, Dr. Rezai reviews your health history and asks about your symptoms. He may also order labs and perform a physical exam to determine if there's a deficiency. 

If your results uncover a nutritional imbalance or vitamin deficiency, Dr. Rezai develops a custom regimen that aligns with your needs.

Are vitamin B12 shots safe?

Vitamin B-12 shots are safe and usually well-tolerated. There are no major side effects other than the risk of an allergic reaction. Following your injections, you're moved to an observation room for 15-20 minutes. If you experience any symptoms, let Dr. Rezai know.

To explore the benefit of vitamin B12 shots, make an appointment at Coastal Primary Care. Call the office or request an appointment online today.