A while ago, the New York Times published an article about a study of Matthijs Kalmijn (UvA). Kalmijn’s study challenges the claim that people who marry get healthier. The study suggests that marriage is unlikely to bring lasting improvements to health or well-being, and could even result in decrements.
You can read the full New York Times article here: Get Married, Get Healthy? Maybe Not
Kalmijn, M. 2017. “The Ambiguous Link between Marriage and Health: A Dynamic Reanalysis of Loss and Gain Effects.” Social Forces 95,1607-36. doi: 10.1093/sf/sox015.