Came out earlier this year I think or late last year. The one positive they came up with was that some “expert panel testers” liked the taste of non-flushed buds over the 14 day and 7 day flushed plants but no significant differences in harvest weight, THC, or terps.
Go to rxgreentechnologies dot com, then click on Knowledge and then Research Trials then Flushing Trial for the full article.