Hi, I am Vahid, an enthusiastic researcher interested in the fields of diseases, beauty, health, sports and healthy nutrition. I enjoy studying and researching topics that help improve the quality of life in the United States and I strive to provide you with useful and scientific information by constantly updating my knowledge. At U.S. Advancement you can find detailed and interesting articles on health, beauty and healthy lifestyle. My goal is to share my knowledge and experience with you and help you live a happier life.