vitamin b12 injections and chemotherapy B12: the essential nutrient with a complicated cancer link Vitamin B12 Chemotherapy Risks: 5

This resistance is mediated by different causes and mechanisms, (that are resumed in Table 1 and excellently summarized in different review articles [78].One of the most obvious and intriguing mechanisms of resistance involves alteration in CD38 expression, a crucial factor in both primary and acquired resistance to anti-CD38 therapies

Vitamin B12 deficiency causes fatigue and other ME/CFS-like symptoms so it should be excluded before a diagnosis of ME/CFS is made, especially in people where there is no clear infective onset

Handbook of vitamins (Fifth ed.)

If these occur, discontinue tirzepatide immediately and seek medical evaluation