Background: The objective of this study was to analyze the effectiveness of a mindfulness-based intervention program for the promotion of well-being and health in family caregivers. Methods: The participants were 111 family women caregivers aged between 33 and 75 years old. This was a double-blinded randomized controlled trial. The mindfulness intervention program lasted 12 weeks. The experimental group underwent mindfulness and acceptance-based interventions (MABIs). The control group performed physical activity training.