I don't know but something is going on
And there was that recent Keto Military study on obesity.
https://forum.lowcarber.org/showthread.php?t=482430

But if Low Carb gets accepted through the Diabetes angle that is fine with me. They can't argue that a diet good for reversal of diabetes could be bad for general health and weight reduction. And "More than 50 percent of Veterans using VHA health care are overweight and many Veterans with a Type 2 diabetes diagnosis carry excess body weight."