Some bacterial species became less abundant in the guts of American football players as the season progressed.
15 May 2026
Some bacterial species became less abundant in the guts of American football players as the season progressed.
Zachary Pelland (centre, red jersey) and his colleagues studied the microbiomes of American football players. Credit: Rich Barnes/Colgate Athletics (CC-BY-4.0)
Scientists have found evidence that knocks to the head that do not cause noticeable symptoms are linked to both long- and short-term changes in the populations of microorganisms in the human gut1.
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