The book's final argument is the one its title points toward: health and wealth are not competing priorities — they are the same investment. Poor health is one of the most expensive things a person can have. Medical costs, reduced productivity, shortened earning years, increased dependence — the financial cost of poor health across a lifetime dwarfs almost every other financial risk. Conversely, the person who invests in their health consistently is protecting and extending the asset that generates all other financial outcomes: their capacity to work, think, decide, and build. This reframes the health-wealth trade-off entirely. Choosing sleep over work, exercise over an extra hour of productivity, adequate nutrition over saving on food costs — these are not health indulgences at the expense of financial discipline. They are the most financially rational choices available.