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If your hemoglobin is below 10g/dL, then iron supplements have to be taken once daily. Syrup Ferritin is a good choice.
A healthy diet will definitely help in elevating your hemoglobin level very soon. Have three meals a day with adequate fruits and soups in between.
You can have more corn, pomegranate, watermelon, sprouts, green leafy vegetables such as spinach, broccoli, etc. If you are a nonvegetarian, you can take more of lean meat (grilled chicken) and boiled eggs.
Revert back with your hemoglobin reports after four weeks.