As discussed earlier, if you have low hemoglobin levels, then you may face the risk of several diseases. Normal hemoglobin levels will be maintained by consuming a balanced diet, which is rich in vitamin B12, folate and of course, iron. Consume foods that are rich in these nutrients, so that you will not will not suffer from a low hemoglobin level. But, if the problem still persists, you can get supplements, which your doctor can prescribe.