Background: This study explores the prognosis impact of nutritional and immune status in metastatic gastric cancer (GC). Recently research has been focused on a proinflammatory status and the relevance of inmune system of the patient in GC. Neutrophil-lymphocyte ratio (NLR) and prognostic nutritional index (PNI) has showed prognostic value in local disease. Our study was assesed in metastatic disease. Methods: One hundred and twenty patients with metastatic gastric adenocarcinoma were retrospectively evaluated between 2011 and 2015. 67.2% were metastatic at diagnosis and 32.8% had a recurrence of disease. Clinical, laboratory and histopathological characteristics were selected as risk factors. The optimal cut-off levels were defined as NLR = 3, PNI (10 x albumin concentration +0.005 x total lymphocyte count) = 43.8, albumin = 3.5 g/dL, body mass index (BMI) = 25. Patients with high NLR and hypoalbuminemia were defined as 2, patients who presented only one abnormally were defined as 1 and those with neither abnormality were defined as 0. Lab data levels were related with survival by Kaplan-Meier and compared by long-rank test. Results: Among 120 patients, mean age was 69 years old, 35% female and 72.5% had no comorbidity. NLR > 3 (6.7 vs 12.5months, p = 0.001), low PNI (7.7 vs 13.1months, p = 0.01) and low albumin (6.2 vs 11.2 months, p = 0.002) were correlated with OS. Significantly, patients with an BMI < 25 had a worse prognosis compared with patients with BMI ≥ 25 (7.4 vs 12.4months, p = 0.02). Obesity in metastatic GC was related with good prognosis in our review. In the group of patients with hypoalbuminemia and h-NLR (27.6%) OS was much worse than patients with normal albumin and low-NLR, 33.6% (4.4months vs. 12.8 months, p < 0.001) Conclusions: High NLR ( > 3) and low PNI ( < 43.8), albumin ( < 3.5g/dL) were correlated with worse outcomes. Moreover, the association in a score of NLR plus albumin showed eight months OS diference. As a recent data in other cancer sites, obesity was related with good prognosis in mGC in our review.