is b12 injection good for you Shots Weight Loss: What Need to Know B12 Shots in Friso, Sherman,

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Gastric bypass surgery can reduce the stomachs ability to produce intrinsic factor, a protein needed for B12 absorption

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It might be helpful for some, but for me, its not showing significant changes." Source: Reddit - r/Fitness 3

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When your body can't absorb the building blocks of protein (amino acids), it can lead to muscle wasting, weakness, and fluid retention (edema), which you might notice as swelling in your legs and ankles