Individuals with Gut Absorption Issues : Conditions like Crohn's disease, celiac disease, or pernicious anemia (an autoimmune condition where the body can't produce intrinsic factor, a protein needed for B12 absorption) can significantly impair B12 uptake
Vitamin B12 is an essential vitamin found in the foods such as meat, eggs, and dairy products
It would be advisable to tell him / her that you have supplemented with B12 (since a high serum B12 level, in the ABSENCE of supplementation, can be indicative of other serious conditions, so your GP will need to know that the high level is probably due to supplements)
But if the stomach cant absorb B12 appropriately, swallowing more capsules is often not enough
Benefits of B12 Shots and Injections Without a doubt, Im sure you are aware of Vitamin B12
Your body absorbs only as much as it needs, and any excess passes through your urine