There is generally no fastest way to replenish blood in the elderly, and usually it can be done through food regimen, medication and other methods.
Elderly people may have poor digestion and absorption, resulting in malnutrition caused by iron deficiency anemia, this situation can be adjusted through food, you can eat more blood replenishing foods, such as animal liver, animal blood, lean meat, eggs, milk, dates and other foods to adjust, pay attention to balanced nutrition.
You can also use medication to replenish blood under the guidance of a doctor, such as ferrous sulfate tablets, iron dextrose tablets and so on.
It is recommended that the elderly blood replenishment should be carried out in a gradual and orderly manner, not blindly use drugs, you can go to the hospital to check, find out the cause of the treatment under the guidance of the doctor.