Had 3 month routine blood test cause of high cholesterol meds. hemoglobin came back 11.4 range is 11.6-15 other months was in normal range. what can cause this? can it be diet? is this a major serious concern? repeating the test? thank you?

A significant decrease in the Hgb or Hct warrants an explanation. You're either losing blood,not making blood normally or your body may be destroying blood. We get clues from low MCV( iron deficiency), high MCV ( Vit B12 or folic acid deficiency), serum iron & TIBC, serum B12 & folate levels, retculocyte count, finding occult blood in a stool sample,etc. Your MD or a hematologist will advise you

All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Talk to the doctor who ordered the tests. Having said that, your hemoglobin is just below normal and is likely to be an indication of iron deficiency. You may take oral iron and multivitamin supplements. Wish you good health!