My study’s better than yours

This way, readers will not be seduced by the grabbing and cherry picking of facts from carnivores Nigel Pike and Robin Grant. 
I researched the University of Graz, Austria, and Pike’s adverse claims about veganism and read, “The reporting on the study does not mention its limitations, that it cannot prove cause and effect.” This trial was also over a limited timeframe, asking questions that were ambiguous at best. 
Vegans who ate no animal products were group-studied with vegetarians who ate fish, eggs and dairy, against carnivores who ate little or large amounts of meat or who ate meat with few or lots of vegetables. The trials involved very crude measures of all health habits and variables for other countries, such as different dietary and lifestyle habits.  Often people with existing health problems switch to vegan diets because they are perceived to be healthier, rather than the vegan diet causing the health problems. The final offering recommended that, for a healthy lifestyle, a plant-based diet with current exercise recommendations was superior. 
This being the case, why would anyone degrade or contaminate a healthy, fibre-filled vegan diet with animal products full of saturated fats and cholesterol, which are associated with cardiovascular disease, stroke, Type 2 diabetes, obesity, bowel and other cancers?
Diane Cornelius
South Australia