Unlike oral supplements, which take time to enter the bloodstream through digestion (and may not be fully utilized), injections deliver the vitamin straight into your bloodstream, skipping the digestive process so your body can use it right away
They concluded that B12 accumulation in the placenta may represent an important factor in providing sufficient amount of this essential nutrient to the fetus (Giugliani, 1985). Due to a lack of clinical trials and case reports examining non-daily doses of B12 in pregnant or breastfeeding women, perhaps non-daily injections can provide some insight
"Pulsed Magnetic Field Treatment Reduces Neuropathic Pain Symptoms and Spinal Oxidative Stress." Bioelectromagnetics , 38(1), 48-58
In proof-of-concept studies, NNMT inhibitors (NNMTis) have demonstrated promise as potential treatments for obesity and obesity-related metabolic comorbidities (e.g., T2D, fatty liver) 8,9,13