i have b12 injections but still tired Why Do Feel Worse After My Injection? Causes & Management – Bolt Pharmacy Feeling worse after B12 Injection:

Just ensure it hasn't expired and is sourced from a trusted provider

This includes: The name of the supplement The dosage The frequency of use We suggest sharing this information with your oncology team at each visit

While theres no definite cutoff for when B12 starts to become unsafe, because people often ask, well somewhat arbitrarily say not to take more than 1,000 g per day over the long-term without guidance from a physician

Circulation 124:17651773 Willmann JK, Chen K, Wang H, Paulmurugan R, Rollins M, Cai W, Wang DS, Chen IY, Gheysens O, Rodriguez-Porcel M et al (2008) Monitoring of the biological response to murine hindlimb ischemia with 64Cu-labeled vascular endothelial growth factor-121 positron emission tomography