It has roots in traditional hacker culture but applies to technology that modifies something organic, from altering cells in a petri dish to ultra-freaky grinder body tweaks, like implanting speakers in your eardrums or embedding a vibrator near a mans pelvis (this exists and is called the Lovetron 9000), or, very recently, editing your own genes
People with Peutz-Jeghers syndrome also often develop complications such as pain, bleeding, or bowel obstruction
Injectable forms have a defensible role under medical supervision for specific indications
instead, they can resensitize insulin signaling
NHS approach to B12 deficiency: NICE Clinical Knowledge Summaries recommend investigating B12 deficiency in patients presenting with macrocytic anaemia, unexplained neurological symptoms, or risk factors including pernicious anaemia, gastrectomy, malabsorption disorders, metformin use, proton pump inhibitors, or nitrous oxide exposure