Diet for Fairer Complexion
I would only suggest a healthy and balanced diet which has all the possible nutritious foods according to your eating habits. Don't overdo anything. A cleaner body means lesser skin problems.
How to remove the tan?
The basic reason for skin darkness is excess exposure to sun and the excess melanin production resulting from the exposure. So, there are some things which one can do to prevent tan and remove it.
Exercise is very very important for bringing a fresh glow to the face and regular hydration of the skin from outside and inside helps the skin maintain a healthy glow and a radiant skin.
Always use accessories like scarf and umbrella when outside in the sun. It helped me most to prevent skin tan.