Weeks to Optimum Health, first published in 1997, encapsulates the style and language used in self-help and health advice literature on both sides of the Atlantic across the second half of the twentieth century. Analysis of this literature reveals cultural preoccupations with notions of balance and efforts to reframe the self under medical direction, as well as concerns about the detrimental effects of modern living on diet and health. More particularly, a key feature of the self-help genre, in relation to diet at least, was a commitment to providing readers with the knowledge and agency necessary to achieve ideal selfhood, health and well-being themselves through what the authors thought to be balanced diets or lifestyles. Drawing on self-help books that were in the Publishers' Digest top ten, The New York Times' bestsellers and books with multiple reprints, this chapter considers the self-help genre as one of the key sources and promoters of thinness, youthfulness, vitality, longevity and health as necessary pillars of twentieth-and twenty-first-century selfhood, but also of the concept of balance as a means of achieving health. More specifically, this chapter draws on the work of popular authors, such as