Switching to preservative-free formulations typically resolves the issue for people who need b12 but react to standard preparations
Heres why, as well as who may benefit most from microdosing and what to know before trying it
Wu K, Vaughan AJ, Bossowski JP, Hao Y, Ziogou A, Kim SM, et al
I came across this in the Retatrutide Phase II data appendix
Mild effects like injection-site reactions or headache were possible for some, but overall its considered safe under medical supervision
To ascertain outcomes, we used ICD-9-CM codes from hospital discharge claims: myocardial infarction (410414), stroke (431436), hospitalization for heart failure (428), hospitalization for any cardiovascular cause (390459), and revascularization (00.55, 00.6166, 36.03, 36.067, 36.1019, 38.48, 39.50, 39.52, 39.71, 39.90)