is b12 injection better than oral Injections vs Pills: Richmond's Complete Guide Vitamin B12 Oral vs Injection​

IV peaks faster

Animal models exposed to 5-Amino-1MQ demonstrate accelerated lipid metabolism and extensive white adipose tissue remodelling, driven by up-regulated SIRT1 activity

The individual risk-benefit calculation depends on specific health status

Long term prescription of medications such as the following are likely to increase the cause of, or exacerbate the risk of B12 deficiency - the proton pump inhibitors (esomeprazole, lansoprazole, omeprazole, pantoprazole, rabeprazole), famotidine, ranitidine, metformin, glibenclamide, gliclazide, glimepiride, glipizide, sodium valproate, gabapentin, doxycycline, some oral contraceptives