The most performance-relevant outcome is improved oxygen delivery, because B12 deficiency directly causes anemia and reduced VO2 max regardless of training
The path to a FULLY OPTIMIZED life requires understanding what each tool actually does, using it appropriately, and refusing to fall for hype, no matter how appealing it sounds
Avoid administration during or immediately after intense exercise
For this reason, the product documentation should include not only the trade name, but also: HPLC result, MS or LC-MS result, information about the sequence or type of salt, data on the purity and auxiliary composition of the solid formulation
Possible side effects include mild redness or swelling at the injection site, headaches, or fatigue
They have a sharp point, a hollow centre, and finally, a hub, that affixes them to the syringe