The end of food

With the population doubling throughout the years sooner or later there wouldn't be enough food to feed everyone. We need to figure something to replace food before there isn't any food left to eat. Rheinheart had though of drinking soylent to replace food. Is it a good idea to drink chemicals in placement of food? Would these chemical drinks have any bad effects? As the author mentioned, when he tried the "soylent diet" he only felt sick in the first week. Maybe these drinks aren't as bad as we think it is if it makes us healthier and it helps us lost some weight. But even if we can survive with these soylent drinks, we are still missing out on the proteins that vegetables and fruits give us. Proteins that can't be chemically made. When there is not enough food in the world to feed everyone, what would really happen? Are we really going to depend on the soylent as our food supply?