plastic comparison and stability testing on expired Hospira vials
They are not entirely comparable (durations, target doses, and populations differ), but they provide an indication of the orders of magnitude
While Vitamin B12 is a naturally occurring nutrient that is generally considered very safe even in high doses, it is still a medical treatment
You go into the fourth one, bam, now you have some slight breathing issues, your skin is itchy, it's red, your breath is horrible, your pee is super sulfur-y, and you're afraid to go back because now it's just destroyed, you actually haven't recovered from it still
Stretch Marks (Striae) Steroid creams reduce skin elasticity and weaken connective tissue, leading to the formation of stretch marks