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The general approach is to cycle it (8-12 weeks on, 4-6 weeks off) and work with a healthcare provider who can monitor relevant biomarkers
People over 60, vegans, and vegetarians often need B12 shots, and the amount needed is measured in micrograms (mcg) and will depend on your age and the conditions that necessitate it
Limited human data exists, mostly anecdotal reports and case observations, and no controlled clinical trials have confirmed direct muscle growth or hypertrophy benefits
fda.gov
A realistic week-by-week breakdown of what happens in your first month changes, labs, and what to watch for
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