The 15 observational studies all showed a positive direct or indirect association between happiness and exercise. (sciencedaily.com)
The mistake health organisations make is they look for studies directly connecting foods to acne; they never consider the evidence showing that food has a strong indirect association with it. (supernaturalacnetreatment.com)
Direct and indirect associations between the variables were tested in a sample of 94 women making the transition to adulthood. (link.springer.com)