Dr. Victor Hugo Lindlahr was an American health food and weight loss pioneer. In 1940 he wrote the book "You Are What You Eat", one of the earliest texts of the health food movement in the United States. His book is also credited for popularizing the expression. Wikipedia
The definitive Wikipedia entry for Victor Lindlahr. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Victor_Lindlahr