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Richard On Fitness
B12 Injections
Support central nervous system function and help improve mood by reducing stress.
$60/MO
+ $25 Membership Subscription
B12 injections may boost energy and mood, reduce fatigue, and may help with mental health, pain, insomnia and more.
Text-based prescribing from board-certified physicians
FDA-approved medication
Free discreet shipping
What We Offer
- Personalized Treatment Plan
- Private & Secure Process
- Data-Driven Insights
- Proven Clinical Results
Free Online Medical Evaluation
Complete a free text-based consultation with a doctor who can quickly approve the medication if you qualify.
Treatment In 3 Easy Steps
1. Order an At-Home Hormone Assessment
The simple finger-prick test measures 8 biomarkers.
2. Telehealth Call
Schedule a 30-minute virtual visit (included in the price of your test) with a licensed physician to discuss treatment options.
3. Get Your Medication
Your monthly treatment is shipped directly to your door. We’re here 24/7 to support you with any questions.
Frequently Asked Questions
Vitamin B12 is one of the most important essential vitamins for health and is an important coenzyme that is required by every cell in your body. Since it’s not made in the body, it has to come from an external source via diet and/or supplementation.
In the United States, 3-6% of the population are vitamin B12 deficient and 15-20% have marginally depleted levels (source).
What do vitamin B12 injections do for you? 
Vitamin B12 is needed for red blood cell formation and DNA production, and supplementation may help with anemia, fatigue, low energy, immunity, detoxification, nerve problems, pain, mental health, insomnia, chronic illnesses, and more.
How do vitamin B12 injections work?
Vitamin B12 plays a crucial role in numerous cellular processes, most notably in the formation of new blood cells and the maintenance of neurological health. On a cellular level, B12 serves as an essential cofactor for two key enzymatic reactions involving methionine synthase and methylmalonyl-CoA mutase.
Methionine synthase facilitates the conversion of homocysteine into methionine, which is vital for producing various molecules, including phospholipids and neurotransmitters, as well as for regulating gene expression. A deficiency in B12 can lead to megaloblastic anemia. Meanwhile, methylmalonyl-CoA mutase is crucial for breaking down odd-chain fatty acids and branched-chain amino acids. A shortage of B12 results in the accumulation of methylmalonyl-CoA, which can cause the neurological issues associated with vitamin B12 deficiency.
How soon do you feel less tired after a B12 injection?
The time it takes to feel less tired after a B12 injection can vary. Some people report feeling more energetic within a few days, while others might not notice improvements for several weeks, depending on the level of deficiency.
How long does a B12 injection last?
Effects from a B12 injection can last several weeks to months, depending on your absorption rate, metabolism, and severity of B12 deficiency.
What are the biggest B12 injection benefits?
Vitamin B12 injections:
- Improve mood by reducing stress
- Support central nervous system function, red blood cell formation, and DNA synthesis
- Reduce the risk of vision loss from age-related macular degeneration when taken with folic acid and vitamin B6
- Lowers homocysteine levels, which is associated with cardiovascular disease and stroke
- May reduce the risk of cognitive decline and Alzheimer’s disease
- Treat pernicious anemia from vitamin B12 deficiency, which can cause nerve damage and stomach cancer.
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Vitamin B12 (Methylcobalamin) comes as a liquid and is injected intramuscularly. Your dosage will be based on your medical condition, response to treatment, and other medications you’re taking. Please take it as advised by your provider.
Vitamin B12 should not be taken by children, pets, those who are pregnant or breastfeeding, or those who are allergic to any of the ingredients in vitamin B12 (Methylcobalamin). Avoid drinking large amounts of alcohol while using vitamin B12.
Make sure your health care provider knows if you have: Leber’s Disease, benzyl alcohol hypersensitivity or allergy, hypokalemia, cobalt allergy, post-surgical stent placement
Tell your provider about your other medicines, especially: chloramphenicol, colchicine, antibiotics, metformin, or medicines that reduce stomach acid, such as cimetidine (Tagamet), omeprazole (Prilosec), lansoprazole (Prevacid), esomeprazole (Nexium), and ranitidine (Zantac).
Potential side effects include:
- Nausea
- Vomiting
- Diarrhea
- Headache
- Fatigue
- Weakness
- Loss of appetite
- A tingling sensation in the feet or hands
- Redness, swelling, or bruising at the injection site
In the event you feel you are in imminent danger or have signs of an allergic reaction, you should contact emergency services immediately. For general symptoms, please advise your provider.
Sources:
Benefits mood by reducing stress (source)
Supports central nervous system function, red blood cell formation, and DNA synthesis (source)
Reduces risk of vision loss from age-related macular degeneration when taken with folic acid and vitamin B6 (source)
Lowers homocysteine levels, which is associated with cardiovascular disease and stroke (source, source), when taken with folic acid and vitamin B6
May reduce the risk of cognitive decline and Alzheimer’s disease (source)
Treats pernicious anemia from vitamin B12 deficiency, which can cause nerve damage and increases the risk of stomach cancer (source)
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Prescription products require an online evaluation with a licensed medical professional who will determine if a prescription is appropriate. Multiple third-party studies have shown the health benefits of vitamin B12 and additional clinical trials are ongoing.