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Poor Absorption: Peptides are too large and unstable to be efficiently absorbed through the intestinal lining
Most people tolerate B12 injections very well, and side effects are usually mild and short-lived
With insurance coverage (where available), out-of-pocket costs vary widely from $25 to $500+ per month depending on the plan
More importantly, first-pass metabolism in the liver reduces the fraction that reaches systemic circulation
Normal serum MMA levels are typically thought to be less than 270 nmol/l in apparently healthy people, but theres little evidence of direct harm for amounts even twice as high as 270 nmol/l
US$ 21.82
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US$ 28.61
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