The most common is mild injection site reaction (redness or itching), which typically resolves within a day
The manifestations may be severe, such as in postural orthostatic tachycardia syndrome, which has been reported to develop within 68 months post severe acute respiratory syndrome coronavirus 2 infection and is characterized by tachycardia, fatigue, cognitive impairment, and orthostatic intolerance [367]
The benzyl alcohol helps maintain the solution's sterility, preventing contamination each time the rubber stopper is punctured
10.1063/1.1288235 65 BodeW.SchwagerP.HuberR
Plus my GP surgery took me off B12 and thats why I self injecting as I couldnt manage without it, however they dont think I should be and its hard to explain to them why I do, they act like Ive told them I inject crack cocaine when I have good reasons for injecting B12 but cant prove it as obviously my B12 comes up sky high in a blood test
Using wrong solutions reduces stability and wastes costly research peptides or hormones