Effects of Selected Vegetable and Herb Mix (SV) on Advanced Non-small Cell Lung Cancer

The primary objective of these two studies is to test the hypothesis that the daily ingestion of a dietary supplement, Selected Vegetables and Herbs Mix (SV), which consists of non-toxic botanicals containing known anti-cancer and/or immune enhancing components, may prolong the survival time of stage IIIB/IV non-small cell lung cancer (NSCLC) patients. Either SV or placebo will be added to their daily diet in a double-blind randomized fashion, so that there will be 2 chances out of 3 of receiving SV and 1 chance out of 3 of receiving placebo. * Study 1: For newly diagnosed patients who will be receiving or have received less than 4 weeks of, a standard chemotherapy regimen. * Study 2: For those who have stopped or refuse standard chemotherapy but will receive best supportive care.