Vitamin B12 Injections
$25
Vitamin B12 is one of the most critical nutrients in the human body and plays a role in everything from energy production to nerve function, brain health and, DNA synthesis. Despite its prevalence, deficiency is common in adults over 50, people on plant-based diets, those with digestive conditions and anyone under chronic stress. Even people eating a balanced diet can have suboptimal levels if their gut isn’t absorbing B12 efficiently.
Intramuscular B12 injections deliver one hundred percent of product into the bloodstream making them dramatically more effective than oral formulations.
What B12 Does in the Body
Energy production. B12 is essential for converting food into usable cellular energy and plays a direct role in mitochondrial function. Low B12 is one of the most commonly overlooked causes of persistent fatigue.
Brain and nerve health. B12 is critical for producing and maintaining myelin — the protective sheath around nerve fibers that enables efficient signal transmission. Adequate B12 supports mental clarity, focus, mood, memory and ballance. Long-term deficiency is associated with cognitive decline and neuropathy.
Red blood cell production. B12 is required for proper red blood cell synthesis. Deficiency leads to megaloblastic anemia — a condition that reduces the blood’s oxygen-carrying capacity, causing fatigue, weakness, and cognitive fog.
Homocysteine regulation. B12 (alongside folate and B6) converts homocysteine into methionine. Elevated homocysteine is a significant risk marker for cardiovascular disease, stroke, and accelerated cognitive decline.
Mood and motivation. B12 is involved in serotonin and dopamine synthesis. Patients with low B12 often experience depression, anxiety, and low motivation. These symptoms frequently improve when B12 levels are restored to an optimal level.
Who Benefits Most
Adults over 40 experiencing fatigue, brain fog, or low energy; people following vegetarian or vegan diets; patients with digestive conditions, patients on metformin or long-term acid-reducing medications; individuals with elevated homocysteine or cardiovascular concerns; anyone focused on cognitive longevity; athletes optimizing recovery; and patients experiencing mood changes or low motivation.
What to Expect
Many patients notice improved energy within days of their first injection. For those with significant deficiency, the improvement can be striking. For those optimizing from a solid baseline, the benefits are subtler but meaningful: sharper focus, better sleep, improved stamina, and a sustained sense of vitality.
Protocols at Rejuvecare
B12 injections can be administered as a standalone service or as part of a broader wellness protocol. Patients with known deficiency often start with a loading series, followed by monthly maintenance. B12 pairs naturally with other IV and injectable therapies, and our providers can tailor a protocol based on your labs, history, and goals.