The World Health Organization (WHO) aims to ensure the highest level of health for all populations. Despite progress, increased life expectancy has not translated into a proportional rise in healthy life years, as chronic diseases are on the rise. In this context, health ecology emerges as a new scientific discipline focused on preserving health rather than curing diseases. It seeks to calculate healthy life expectancy by analyzing individual, social, and systemic choices, offering a proactive and rigorous approach to making informed decisions and improving long-term well-being.