This paper summarizes a variety of promising research instead of specific diets. The first two sentences of the conclusion summarize it fairly well: Recent and

This paper summarizes a variety of promising research instead of specific diets. The first two sentences of the conclusion summarize it fairly well: Recent and accumulating work in unicellular and invertebrate model organisms, rodents, monkeys, and humans indicates that diet has a much more pervasive and prominent role than previously thought in modulating mechanisms of aging and its associated diseases. More work is needed to understand the interactions among calorie intake, meal frequency and timing, single-nutrient modifications, the microbiome, and nutritional history in modulating the key mechanisms that maintain cellular, tissue, and organ function during aging The reddit TLDR is "More research is needed".