How is the core focus of Lulu Hunt Peters' popularized method distinguished from Atwater’s scientific scaffolding work?

Behavioral compliance versus physiological potential.

The distinction between the two pioneers lies in their ultimate application focus. Dr. Atwater's laboratory work centered on understanding the physiological potential—the absolute maximum energy a substance could theoretically yield under ideal, controlled conditions measured by burning it completely. In contrast, Lulu Hunt Peters shifted this focus entirely to behavioral compliance. She applied those energy numbers to the subjective, day-to-day measurement and restriction exercised by the individual. Her innovation was introducing the necessary behavioral component—the daily tallying and adherence to limits—which characterizes the modern cultural practice of calorie counting, moving beyond mere scientific quantification.