In vertebrates, the immune system is considered the last line of defense against foreign invaders.It fights by destroying pathogens and tumor cells using mechanisms that constantly adapt to recognize and rid these disease causing cells.
Which is Better for Weight Loss? Some studies have found that low-carb diets are more effective for weight loss and fat loss than low-fat diets. A study published in 2014 in Annals of Internal Medicine showed that this was the case, even after a period of 12 months.
A vegan diet may be better than the typical low-fat diet recommended by the mainstream nutrition organizations, but pretty much any diet fits that description. Bottom line: Despite all the propaganda, there isn't any evidence that vegan diets are any better than other diets.