A keto diet reduced liver fat by roughly 67% and reversed prediabetes in half of participants, but the study's small sample size is a caveat.
https://www.foxnews.com/health/popular-diet-slashes-liver-fat-67-percent-reversing-prediabetes-people
https://www.foxnews.com/health/popular-diet-slashes-liver-fat-67-percent-reversing-prediabetes-people