First take a glass and fill it with water. Than pull a strand of your hair. Place the hair in the the glass of water and observe.
If the hair is floating on the surface, your hair is in good condition.
If the strand is sinking deeper into the cup, then you should seriously be concerned for your hair health as your hair porosity is very high.
Fortunately, nature offers innumerable solutions for lifeless hair, and one of the best is honey.
Rub half cup of honey on the hair, you can also add 2-3 teaspoons of olive oil. Allow the mixture to stand for 20 minutes, then rinse well.