It's in the first paragraph: > Across three studies involving more than 1,800 participants, the findings — published in the journal Brain, Behavior and Immunit

It's in the first paragraph: > Across three studies involving more than 1,800 participants, the findings — published in the journal Brain, Behavior and Immunity — indicate that increased levels of C-reactive protein (CRP), which the liver makes in response to inflammation in the body, can promote social media use among middle-aged adults and college students. https://en.wikipedia.org/wiki/C-reactive_protein https://en.wikipedia.org/wiki/C-reactive_protein