1) Blood sugar level
Studies show that people who follow a vegan diet for one month, are found with improved blood glucose levels and reduced body weight, as well as decreased total cholesterol, and bad cholesterol (LDL-cholesterol). It is because the vegan diet alters gut microbiota.
Vegan diets reduce the population of pathobionts, therefore it decreases inflammation and contributing to the improved glucose tolerance and lipid metabolism of the body.
It is believed that the fiber content of vegan diets is despensible in regulating the inflammatory response.
The most recent evidence that a vegan diet improves a gut microbiota that directly reduces metabolic disease risk, such as l-carnitine metabolism and risk of narrow arteries.
Studies found that microbial metabolism of l-carnitine, which can be found in red meat, produces an organic compound, which has been shown to cause arteries to narrow and block blood flow.