Doctor, I have sickle cell trait. I have been taking folic acid 5mg regularly since long. But, What is the reason my hemoglobin level always stays between 11-12. In extreme cold/cold, sometimes, I get muscle ache in my leg(under knee muscle). Once, when I had undergone cbc test before 2 months and under impression, it was written as cold agglutinin suspected (Before that night, I had slept with ac turned on). So, what should I eat and what supplement or medicine should I take along with folic acid 5mg ? I was thinking to start taking livogen tonic along with folic acid tablet. Please advise. Thank you.