How low is 5.5 haemoglobin level?
5.5 is very low. One must take iron supplements if your hemoglobin levels are 5.5. However, consider investigating why your levels are low with a blood test.
Hemoglobin levels are considered low if they are below 12 in women, and below 13 in males. Hence, If you are having hemoglobin count 8 then you are having anemia and you must seek help from a doctor.
For young males it is 14-18 g/dL or 8.7-11.2 mmol/L (SI units)
One way to increase hemoglobin content in the blood is to increase your iron intake. You can do this by eating foods rich in iron. These include spinach, liver and organ meat, cabbage, green beans, and tofu. Folate is a vitamin that your body uses to create haem and is present in spinach, rice, and meat. This way you can increase your hemoglobin levels quickly without medications.