does b12 injections make you tired Why Do I Feel Worse After My Injection do b12 injections make you

Once it is maxed out, anything left over has to rely on the second pathway, passive diffusion, where B12 simply seeps across the intestinal wall on its own

Reduce fatigue: Low B12 levels can cause tiredness and sluggishness

Sublingual form avoids injections while still helping with appetite control and weight loss

Because your body uses and excretes B12 rather than storing unlimited amounts, consistent timing helps keep your energy and focus steady instead of peaking and crashing. Many people find that taking B12 late in the day can make them feel more alert right when they are trying to wind down, which may interfere with sleep