A word of caution...fasting can be detrimental to one's health, especially if there is a pre-existing condition. Make sure you are healthy enough to fast.
The point of fasting is not to give something up, per say, but to give something to God. Personally, I think He would rather have more of my time than have me give up a food group. I can go through 40 days of the "elimination diet" - but having done a nutritional cleanse several times a year, it is more about me, and my health. It is not about God. Yes, it is good for my physically, but it doesn't necessary bring God into my life more unless I ask Him to personally take away cravings, and eliminate temptations, or pray for the commitment to remain in the face of a celebratory situation. Know what I mean?
This Lent I have no doubt what God wants of me. He has been asking me for it for a while now...and it requires of me to slow down and make space in my day to day for Him. I'm not talking about a 5 minute bed time prayer, or 60 second "wake up and thank God for the goodness in my day ahead", nor praying for and over others. It's between He and I. But I do need to let my children know where they can find me if necessary.
Give God some of your space this Lent! It will be good for your soul and spirit!