2 Ultimately, current evidence supports a common-sense approach: when maintained within a healthy range, vitamin B12 plays an essential role in supporting overall health and well-being
If you have a vitamin B deficiency or just need a boost, consider the benefits of B12 shots for gaining your energy back
That could reduce its ability to be absorbed when it gets to the small intestine
Some more severe, but rare, side effects that can occur are low potassium levels, muscle cramps, irregular heartbeat, chest pains, or blurred vision
When levels drop, the symptoms can be subtle at first, then hard to ignore
If you arent completely confident in your ability or feel worried, a safe choice may be to schedule an appointment to have it administered by a physician in their clinic, or to have your B12 shot administered at a pharmacy