If you're severely B12-deficient, your doctor may recommend B12 injections into a muscle, making the vitamin readily available to your system
Brain fog
human studies report only mild, transient side effects (occasional headache or nausea) [1] [8]
Call your health care provider immediately if you are experiencing any signs of an allergic reaction: skin rash, itching or hives, swelling of the face, lips, or tongue, blue tint to skin, chest tightness, pain, difficulty breathing, wheezing, dizziness, red, swollen painful area on the leg
Studies suggest that the VEGF/VEGFR-2 pathway may be particularly relevant, as its activation seems to trigger intracellular signaling cascades that potentially influence endothelial cell migration, proliferation, and survival