The purpose of this study is to evaluate the effectiveness of a behavioural intervention designed to reduce exposure to environmental chemical pollutants among adults in Spain.

Inclusion Criteria for the Screening phase:

• Not planning to change residence within one year after recruitment
• Spanish fluency
• Living independently in the community
• WhatsApp user
• Age 30-60 years
• Providing signed informed consent

Exclusion Criteria for the Screening phase:

• Unable to provide any of the required biological samples
• Suffering any chronic condition that substantially hinders adherence to the trial protocol and/or affects pollutant analyses
• Inability to understand the informed consent, questionnaires, or intervention
• Already participating in another intervention trial at the time of recruitment
• Pregnancy or lactation
• Inability to communicate with the research team and/or to attend the follow-up visits

Inclusion Criteria for the Intervention Phase:

• Not planning to change residence within one year after recruitment
• Spanish fluency
• Living independently in the community
• WhatsApp user
• Age 30-60 years
• Providing signed informed consent
• Participant of the Screening phase

Exclusion Criteria for the Intervention Phase:

• Unable to provide any of the required biological samples
• Suffering from any chronic condition that substantially hinders adherence to the trial protocol and/or affects pollutant analyses
• Inability to understand the informed consent, questionnaires, or intervention
• Already participating in another intervention trial at the time of recruitment
• Pregnancy or lactation
• Inability to communicate with the research team and/or attend follow-up visits

Under request