Absorbtion issues?

[JP_1980]

39 healthy diet, keeps fit had various IBS symptoms over the last 5 years, worsened after a course of antibiotics but improved greatly after finding raw Kefir. Previous blood donor but had to stop as ferritin was low so not donated for over a year & taken iron supplements & avoid tea/coffe with meals & add vit C rich foods when eating iron rich foods but latest blood work showed

ferratin levels 19ug/L

T.I.B.C 86 UMOL/L

all other results normal other than B12 was very high a few years ago over 1000 & is often around 4-600 & latest result B12 716