The Enhanced Recovery After Surgery (ERAS®) protocol integrates multidisciplinary strategies, including perioperative nutrition, to optimize recovery in elective colorectal surgery. This prospective observational study at Hospital Dr. Nélio Mendonça, in Portugal, evaluated its impact on 23 patients (mean age 66±12.1 years, 65% male), compared to pre-ERAS® care (historical LOS=13 days). Nutritional risk (NRS-2002 ≥3 in 47.8%), BMI (mean 26.2±4.5 kg/m²), postoperative complications, length of hospital stay (LOS), and quality of life (EORTC QLQ-CR29, 1 week to 1 month post-discharge) were assessed. Nearly half (47.8%) were at nutritional risk, associated with longer LOS (p=0.05). Mean LOS was 8±6.5 days (reduced vs. pre-ERAS®), with 39 complications (mainly hemorrhagic, gastrointestinal, metabolic). Quality-of-life scores indicated mild-to-moderate symptoms and satisfactory functional recovery. Perioperative nutrition within ERAS® significantly reduces LOS and complications, underscoring the nutritionist's essential role in multidisciplinary teams and supporting wider protocol implementation in Portuguese hospitals.