ABSTRACT: To describe changes in weight, body fat mass and food intake in overweight and obese people, who consumed 30g of ground flaxseed daily during eight weeks and to report the tolerance to this treatment. Materials and methods: It was an intervention study. A group of 10 overweight adults were selected to voluntarily consume 30g of ground flaxseed through eight weeks. They were asked not to change their usual food intake and their physical activity routine during the intervention. Food consumption, physical activity and anthropometric variables were measured at baseline, week four and week eight. Subject’s tolerance to consumption of ground flaxseed was measured each week. Results: No significant changes in weight (p=0,610), and body fat mass (p=0,866) were observed. Participants did not report adverse effects. Conclusions: Intake of 30 g of ground flaxseed daily for eight weeks, without reductions of caloric intake and without increases in physical activity didn’t show significant weight reductions in overweight individuals.RESUMEN: describir los cambios en el peso, el porcentaje de grasa corporal y la ingesta de alimentos de personas con sobrepeso y obesidad, que consumieron 30g diarios de linaza molida durante ocho semanas y reportar su tolerancia a este tratamiento. Materiales y métodos: se intervino un grupo de 10 participantes adultos con exceso de peso, voluntarios, quienes consumieron una dosis diaria de 30g de linaza molida durante ocho semanas, a quienes se les solicitó no modificar su ingesta usual de alimentos y no cambiar su patrón de actividad física durante la intervención. Se midieron variables antropométricas, de consumo de alimentos y de actividad física en las semanas cero, cuatro y ocho, y se evaluó semanalmente la aceptación y tolerancia al tratamiento. Resultados: al finalizar la intervención, los participantes no tuvieron cambios significativos en su peso (p=0,610), ni en su porcentaje de grasa corporal (p=0,866). No se presentaron efectos adversos. Conclusión: el consumo de 30g diarios de linaza molida durante ocho semanas, sin hacer reducciones en el consumo calórico y sin incrementos en la realización de actividad física, no permite reducciones de peso corporal en personas con exceso de peso
