Why do I constanly think about food ?

I recommend a high quality B complex supplement. The smoking thing is definitely related because nicotine is a mild appetite suppressant. Much of what we eat has chemicals in it that are addictive, like MSG, and the powers that be want us literally "addicted" to food. (lol) It sells a lot of happy meals. The B complex helped me with my nicotine problem, and helped curb my drinking in the past. I suggest spending more, and getting good quality B complex, not the cheapest stuff you find in the store.