b12 injections vs pills The Advantages of Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Do You Need a Prescription

Some factors that influence how long the shot lasts include: Lifestyle and stress levels Diet and alcohol consumption Existing health conditions (e.g., pernicious anemia, digestive disorders) How quickly your body uses or excretes B12 If your energy starts fading or symptoms return before your next scheduled shot, let your provider know

Mood Swings The overdose of vitamin B12 can also affect the peace of your mind

Reducing the dose or slowing the injection can help

Current medical evidence shows that individuals with normal B12 levels are unlikely to experience increased energy or reduced fatigue from extra B12 supplementation, as the body simply excretes what it does not need