what happens if you inject b12 into vein Injections at Home - Safety Guide for Self-Administration B12 Injection Dosage and Frequency:

Brain fog, difficulty concentrating, memory changes, and mood shifts can show up gradually and may be mistaken for stress or hormonal changes

When you feel tired all the time, or more often than seems normal, theres a good chance youre struggling with a chronic form of fatigue, which can stem from a range of issues, including lifestyle choices or medical illnesses

Natural B12 production may be restricted by stress, disease, rigorous training, low-quality feed, or age-related digestive changes

Heres how specific conditions can impact the use of B12 shots: Heart Disease: While B12 is essential for overall health, excessive amounts of vitamin B12 in the body may sometimes cause an increase in certain heart disease risk markers, particularly for individuals with pre-existing cardiovascular conditions