Purpose: Evaluate the impacts of the nutritional education intervention for patients with multiples chronic conditions during smoking cessation. Methods: The non-probabilistic sample consisted of adult and elderly 18 individuals of both sexes, participants in a group for smoking cessation treatment. At the beginning of treatment, smoking history, degree of dependence and stage of motivation were evaluated. Craving degree was evaluated weekly during the first month. Anthropometric and biochemical evaluations were conducted at baseline, after 1 month and 3 months. Dietary intake was assessed by the "How is your diet?" questionnaire. There were three moments of nutritional intervention. The themes covered were "Energy balance and physical activity", "Healthy eating" and the importance of fruits and vegetables in the diet, respectively. Statistical analysis with Shapiro Wilk normality test, paired T-Test or Wilcoxon and U-Mann Whitney (Significance ≤0.05). Results: In the intervention group, most people had a high degree of smoking dependence (55.6%), while in the control group the frequency were 22.2%. Craving degree decreased significantly after 1 month of treatment (p= 0.017). After 3 months, the groups presented mean body weight positive variation, however below 3%. In both groups the average percentage of weight gain was below 3%, reinforcing that the holding of the nutrition session and performance of the nutritionist within the protocol proposed by the INCA helped in the control of weight gain.. Blood glucose and HOMA-IR in the intervention group showed a significant increase (p= 0.15 and p= 0.50, respectively). Conclusion: Greater proximity and more frequent action taken by the nutritionist assists and encourages healthy eating practices during smoking cessation process, which can benefit individuals control of chronic diseases in the long term