The skin colour and texture is a genetic factors which is inherited from our parents. So expecting drastic changes by taking costly treatments is not logical. What is important is to keep the skin health
along with overall fitness of the body. So keep the skin well hydrated by drinking 10-12 glasses of water. Sleep properly so that the body works efficiently. Eat healthy food (daily vegetables and fruits) which can nourish the skin from inside. Do yoga and pranayam along with meditation
. Slowly but surely your skin will glow and the dullness will vanish.