But for people with normal B12 levels, injections do not reliably cause targeted fat loss
However, oral vitamin B 12 can be absorbed passively independent of intrinsic factor
PMC 2895704
(Provides pharmacological details on pyridoxine, including its role as a coenzyme in neurotransmitter synthesis and interactions such as the antagonism of levodopa and reduction of phenytoin levels)
More serous B12 deficiencies have the potential to impair heart and neurological function, leading to a wide range of serous symptoms, including but not limited to tinnitus, severe joint pain, memory problems, depression, anxiety, poor muscle function, ataxia, and changes in reflexes
Over time, repeated clinic visits can easily mean thousands of dollars a month for those on a daily injection protocol