b12 injections benefit Shot Feeling worse after B12 Injection:

The systematic review protocol was registered in the International Prospective Register of Systematic Reviews (PROSPERO), registration number: CRD42024554513 (Available from) ( 2.2 PICOs question The primary research question addressed in this review was: What is the effectiveness of sublingual/oral administration of Vitamin B12 alone or compared to other forms of administration (e.g., intramuscular injection)?

[139] [140] The work required the effort of 91 postdoctoral fellows (mostly at Harvard) and 12 PhD students (at ETH Zurich) from 19 nations

A 2015 rabbit osteoarthritis model found that intra-articular injection of AOD-9604, particularly combined with hyaluronic acid, improved cartilage integrity and reduced joint degradation

However, some research suggests that a very high intake of vitamin B12 may increase the risk of death