A randomized controlled trial (or RCT) is a type of scientific experiment that aims to reduce bias when testing theories; this is accomplished by randomly allocating subjects to two or more groups, treating them differently, and then comparing them with respect to a measured response.
Reading them will give you more insight than any health or fitness gurus.
Below I provide some results from Randomised Controlled Trails (RCTs) regarding eating low carb.
Several meta-analyses of RCTs (considered the strongest, most robust type of evidence) have come to the similar conclusions about the effectiveness of low carb and keto.
Low carb does not just result in more weight loss than other comparison diets, it also results in more fat loss, especially when carbs are limited to 50 grams per day:
A 2015 article in the prestigious journal The Lancet summarizes all major low-fat weight loss scientific trials. The conclusion? There’s no evidence that low-fat helps people lose weight, compared to any other diet advice.