Re: I've been trying to find a nutrition guide for food coloring.

Artificial food colors have no nutrients in them; they are simply coloring 
agents.  They are a chemical compound with a set structure, but contain no 
ingredients or nutrients as would fruits and vegetables.  The artificial 
food colorings that may be used in foods sold in the US are all called, F D 
& C colors (Food, Drug and Cosmetic).  They will be listed on the 
ingredient listing of foods containing them as FD &  C followed by the 
color and its number, for example, FD & C green No. 3.  More information 
about the individual colors can be found in the Food Additives Handbook, 
Richard J. Lewis, Sr.  It is published by van Nostrand/Reinhold.  The FDA 
website (www.fda.gov) also has some additional information.

By the way, nutritionists always recommend eating fruits and vegetables for 
the overall nutritional value instead of taking supplements.  Good luck 
with your science project.