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[Admin Note: This is a new thread to consolidate the important discussion of Vitamin B12 levels, deficiency and supplementation started by Cloud in this thread originally by Zeta on his Extreme blood values. The topic of B12 deficiency, particularly for CR Practitioners who don't generally consume a lot of meat, deserves its own thread. -Dean] Hello, can I ask a question? What happens if the body can't absorb the iron from diet? I am asking about the relationship between serum iron and ferritin. In March I had serum iron at 134 mcg/dL, ferritin at 71.30 mcg/dL (and B12 very low 79 mcg/dL) , now at the latest analysis serum iron is 209 mcg/dL and ferritin is 96.60 mcg/dL and because I am supplementing B12 is 156. I am wondering what mean this so high serum iron. Could it come from food containing iron that I can not absorb? In the last months the only foods, containing much iron I introduced as new, was pistachios and dark chocolate. I also, as some of you, drink about 1 L/day of green tea, that should limit a lot iron absorption. I still have to show this data to my doctor. Thanks!