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But it is not eliminated
While oral B12 supplements are available, vitamin B12 injections have advantages including enhanced absorption since it bypasses digestion, a fast-acting energy boost from quick absorption, higher blood levels reached versus pills, lasting benefits between maintenance doses, improved concentration and mental clarity, and often more affordable and convenient long-term
It contrasts that with prescription formulations, which reach the bloodstream either by subcutaneous injection or through oral formulations built around absorption enhancers
Thats why weight loss is so hard, and people tend to yo-yo back and forth
10.18632/oncotarget.17757 69 LiuH.DengH.ZhaoY.LiC.LiangY