Avoid injecting into tendons (e.g Achilles) directly, unless injecting the sheath, to prevent rupture
In a study of patients with chronic low back pain, Vitamin B12 given for 2 weeks reduced pain by 32% compared to placebo [Chiu, 2011] In a 2020 systematic review looking at the use of B12 for nerve-related pain it was found that there is moderate evidence for the therapeutic effect of B12 in the treatment painful peripheral neuropathy [Julian, 2020]
Note: some secondary sources cite the 2018 Neelakantan Biochem Pharmacol paper under differing PMIDs (29155147 vs 29355482)
Some also pay a premium for a mixture of ingredients made up of Vitamin C and other elements, including collagen and placenta
A total of 240 hair follicles were isolated and placed in controlled laboratory conditions (Williams' E Medium at 37C)
For athletes, this means more training volume without hitting the wall , faster turnaround between sessions, and a metabolic environment that supports both performance and physique goals