Some people really are more likely to run low on B12: Vegans and vegetarians, since B12 comes mostly from animal foods Adults past about 60, who tend to absorb it less well Anyone with gut or absorption issues, from Crohn's and celiac to weight-loss surgery People on certain medications, including metformin and long-term acid reducers The shot itself takes about a minute
It is necessary for several aspects of health including formation of red blood cells, synthesis of DNA, energy production, heart health, brain function, and more
Long-term human safety data not established
Growth hormone & IGF research: official journal of the Growth Hormone Research Society and the International IGF Research Society , 9 (2), 106113
Some patients use peptides in 3-month cycles