The general objective of this project is to investigate the interplay of the gut microbiome - endocannabinoid axis with host environmental factors and intestinal, metabolic and mental health status in free-living adults with various metabolic statuses and lifestyles.

The gut microbiome and the endocannabinoid system (ECS) could be interacting together and influence local enteric and peripheral metabolic functions and mental health.

The association of some host environmental factors (e.g. age, metabolic status, dietary habits) with gut microbiota composition and function has been investigated but, to our knowledge, little is known about their influence on the ECS.

There is also a need to better understand the influence of these factors and the interplay between the gut microbiota and the ECS and their relationship with intestinal, metabolic and mental health.

The investigators therefore propose to fill this knowledge-gap in the general population of adults with various body composition, dietary habits and daily physical activity levels.

Inclusion Criteria:

• Computer and internet access
• Understanding of written French

Exclusion Criteria:

• Intestinal pathologies
• Pregnancy or breast-feeding
• Recent significant weight variations
• Recent completion of antibiotic treatment
• Alcohol consumption over sex-specific recommendations

Free-living adults with various body composition, dietary habits and daily physical activity levels from the Quebec city region.