Although a number of studies identifying a key role for metformin in the gut were undertaken many years ago, more recent studies have focused on metformin action in the liver, where it undoubtedly exerts a glucose-lowering effect
When administering subcutaneous injections, the abdomen and upper thigh are the most preferred sites, but other areas such as the upper arm and buttocks may also be used
10.1126/science.124.3220.484-a Science
Since it is highly present in animal products, vegetarians and vegans have to be most concerned with the nutrition of B12
doi: 10.1161/CIRCULATIONAHA.121.057934 103 NevesJSBorges-CanhaMVasques-NvoaFGreenJBLeiterLAGrangerCBet al
GI Problems: Sometimes oral supplements cause diarrhea, bloat, or upset of the stomach