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by nckmi 2053 days ago
That ambiguity irked me, too. The full text[1] mentions collecting serum samples from participants "after at least 8 h of fasting," and that the study was conducted from early May to early June at Baylor in Houston, which would make for a ~14 hour fast each day.

[1] https://www.nature.com/articles/s41598-020-73767-w