I assume you are referring to the hematocrit. Normal for males is 45-46. Females generally run lower. You are a tad on the anemic side. In modern times not many people use iron frying pans, which is one reason. Females also lose blood because of their period. This is not something to be overly concerned with, but you should consider taking a daily vitamin tablet, which includes an iron supplement.
Thanks for writing to the forum!
As caregiver suggested you are probably talking about hematocrit. Low hematocrit is due to anemia, malnutrition, destruction of red cells by spleen, bone marrow failure, and blood loss as in stomach ulcers and irritable bowel disease or in kidney stones. Leukemia, multiple myeloma and rheumatoid arthritis are the other problems with low hematocrit.
The normal range for men is generally 40.7 to 50.7 with 45-46 being optimum.
Hope this helps. It is difficult to comment beyond this at this stage. Please let me know if there is any thing else and do keep me posted. Take care!