Yes, I've found a few studies on that topic, you can check out these links :

• https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/1710093

• https://www.ncbi.nlm.nih.gov/pubmed/26853923

• https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073139/

• https://www.ncbi.nlm.nih.gov/pubmed/12372158

Also there's a good Youtube channel - Mic. the Vegan, there you can see a lot of videos explaining studies in an easy way. Also there is NutritionFacts.org channel with tons of scientific studies explained, on various topics, including benefits of plant-based diets.