5-Amino-1MQ works differently -- it inhibits NNMT, an enzyme that diverts nicotinamide away from the NAD+ salvage pathway
This increases the activity of sirtuins (SIRT1) and PARPs, which are essential for DNA repair and longevity
Advantages of oral form over IM injection: Less nursing time on injections Less complexity of care Less discomfort/pain Less bleeding in patients who take anticoagulants Less costly according to some analyses Disadvantages of oral form over IM injection:: Greater risk of non-compliance In 1991, a survey done on Minneapolis internists led one commentary to conclude that oral vitamin B 12 replacement for pernicious anemia was one of medicines best kept secret. 18 In 1996, when the survey was repeated again in the same area, awareness and use of oral vitamin B 12 for pernicious anemia had increased substantially (019%), but the majority of doctors still remain unaware of this treatment option (61%)

According to the Centers for Medicare & Medicaid Services (CMS), Original Medicare (Parts A and B) covers vitamin B12 injections when theyre medically necessary when: You have a history of low blood levels of vitamin B12 or conditions that are caused by or cause low B12 levels such as certain autoimmune and gastrointestinal disorders
These effects were generally mild and transient
Drug Interactions Patients should inform their healthcare provider of all medications and supplements