In addition to weight loss, fasting can reduce activated microglia in the brain which could play some part in this, as microglia was mentioned in the study.
I would agree. I too met my wife on OkCupid and she happens to be the smartest woman I know. Her whole family is incredibly smart.
I had another OKC date from that era where the woman had a very high IQ, her father was a prolific author and her late 20’s brother was VP of ask.com at the time.
I had just assumed it was the Silicon Valley bubble clientele (and still just might’ve been). But only 3 years later I recall younger male coworkers describing how much dating apps declined and how terrible the dating scene had become with “swipe culture”.