If you feel weakness, frequent headaches, fatigue or dizziness than you need to increase the blood level of your body. There are many fruits & vegetables which will help to increase red blood cells in your body.
Iron Rich Food: Dried fruits such as prunes and raisins are great to increase the iron level in your body which is very important for red blood cells. Kidney & livers are also good for getting iron.
Vitamin A: Watermelon & grapefruit are the best fruits if you want to increase the intake of Vitamin A in your body. Carrots and spinach are also a good source for vitamin A.
Copper: Copper is also very important for increasing red blood cells and you can get it through cherries, nuts and beans.
So start eating prunes, raisins, cherries, watermelon and grapefruits to become healthy and avoid weakness and headaches.