Lyophilised shelf life: up to 24 months when stored correctly
The one thing not to do is stop or change a prescribed course suddenly on your own, especially where the cause is non-dietary and the treatment is lifelong
If you have a temporary deficiency or increased requirement (say, after a surgery or during recovery from an acute illness), you might only need a short course, perhaps a few weeks of injections, until your vitamin levels normalize or you can meet your needs by mouth again
Many users report that their metabolism feels reset, with improved ability to maintain healthy body weight even after discontinuing treatment
Pregnancy involves complex hormonal changes
Avoid aggressive shaking, as excessive agitation may affect product stability