Hello dear,
Thank you for your contact to health care magic.
I read and understand your concern. 
I am Dr Arun Tank answering your concern. 
Natural blood loss is common in females via menstrual cycles. So if you are female loss is common in you.
If you are male than the thing is worry some.
In both the cases it is necssaery to know the exact cause of 
haemoglobin loss.
Final treatment of such a cause is the treatment for haemoglobin loss.
Till you search the cause I advice you to take the 
proferrin as you are taking. It is also advice you to take 
vitamin B12 and 
folic acid. As this is also important in boosting up your 
hemoglobin level.
I will be happy to answer your further concern on bit.ly/DrArun.
Please hit thank you for me if you are helped.
Thank you,
Dr Arun Tank
Infectious diseases specialist.