"Biology of incretins: GLP-1 and GIP"
In plain terms, C is a multiplier that tells you how fast or slow a battery can supply power without overheating or damaging its internal components
If you happen to not get enough of it in your diet (such as if you are a vegan or have dietary restrictions like food allergies, for instance) then yes, taking a modest amount of vitamin B12 can help treat your acne flares and give you back the clear, healthy skin you desire
With a loading protocol, initial effects can often be observed within the first 1-2 weeks
This is one reason the slow titration approach exists, and why starting at the lowest effective dose matters for both your comfort and your willingness to continue treatment
Glucagon plays a somewhat counterintuitive role: It stimulates the liver to release glucose and raise blood sugar which is why it hasnt been historically useful in treating type 2 diabetes [6]