11/13/2025
High B12 doesn’t always mean your body is using it well.
Autoimmune and inflammatory conditions like Hashimoto’s, pernicious anemia, celiac disease, Crohn’s, or gut inflammation can block proper absorption and use of B12.
When this happens, B12 builds up in the blood but can’t enter your cells — leading to functional B12 deficiency.
The result? Fatigue, brain fog, nerve symptoms, and elevated homocysteine, which fuels more inflammation.
It’s not just about having B12 — it’s about how well your body can use it. 💧