I was going to say that the best way to read a paper is to jump from abstract to the conclusion to quickly get a lay of the land before reading the figures and the methods. But in this case you found a really sneaky deal breaker.

> The FMD is a plant-based diet designed to attain fasting-like effects on the serum levels of IGF-1, IGFBP-1, glucose, and ketone bodies while providing both macro- and micronutrients to minimize the burden of fasting and adverse effects. Day 1 of the FMD supplies ~4600 kJ (11% protein, 46% fat, and 43% carbohydrate), whereas days 2 to 5 provide ~3000 kJ (9% protein, 44% fat, and 47% carbohydrate) per day. The FMD provided by L-Nutra to this study participants comprises proprietary formulations belonging to USC and L-Nutra (www.prolonfmd.com) of vegetable-based soups, energy bars, energy drinks, chip snacks, tea, and a supplement providing high levels of minerals, vitamins, and essential fatty acids34. All items to be consumed per day were individually boxed (Prolon) to allow the study participants to choose when to eat while avoiding accidentally consuming components of the following day.

They bought a fucking Nature paper.

Wild.