<p>Research on self-regulation has predominantly been focused on positive framed constructs (e.g.: doing something). In contrast, negation self-regulation (not doing something) and its association with behavior and habit remains widely under-researched. This study aimed to examine the direction of: (1) longitudinal associations between negation self-regulation variables (negative formulations of intentions-plans-action control); (2) longitudinal associations between negation action control and snacking behavior and; (3) longitudinal associations between snacking behavior and habit. This was done by means of a three-wave panel study conducted with Costa Rican high school students (<i>n</i> = 203, M_age = 15.39 (SD = 1.43)). Data were analyzed using cross-lagged panel modeling. Findings were different to those expected for positive self-regulation variables. It was found that: (1) negation action control was associated to subsequent negation plans, and negation plans were associated to subsequent negation intentions; (2) negation action control was not longitudinally related to snacking behavior and; (3) snacking behavior and habit were longitudinally and bidirectionally associated. Theoretical accounts and implications are discussed.</p>