If your dosing protocol requires 50mcg per administration, each dose is 0.05mL (5 units on a U-100 insulin syringe)
In addition, one of the GPX4 encoded proteins plays a role in sperm maturation, a process that is structural not enzymatic
Reference: Portland Juice Co 5
But a huge number of meat eaters are also deficient and likely dont know it B12 is absorbed through the stomach, and our ability to assimilate it through the stomach wall decreases with age, as well as due to any stomach issues like IBS, Crohns, and Celiac Disease, and medications that impact the stomach like metformin, antacids, PPIs, and ibuprofen
These supplements are available in many forms, like powder, capsules, tablets, liquids, or IV infusion
Nanomater (Basel, Switz)