It is much more beneficial to do a whole test as recomended. NutriEval and Estroessence This is my advice now. When I started testing I did not knew about NutriEval, I new only about ONE. So I ordered ONE and separately Essential and Metabolic Fatty Acid Analysis (RBC) When I post the reports you will see the difference in quality of reports. ONE comes with a complete list of supplements the other test I have to figure out my self. I will be able to figure out what I am supposed to take but not how much. I wil probably even miss on some supplements also. Now I am waiting for a kit for Elemental Analysis, Packed Erythrocytes Another delay and less detailed reporting. Do your self a favor, do complete test, it is worth it.