Impostor syndrome involves chronic self-doubt and fear of being exposed as a fraud despite objective evidence of competence and success. Neurobiologically, it stems from dysregulation in neural circuits that evaluate self-competence and internalize achievements. The brain's threat detection system (amygdala) becomes hyperactive around evaluation and performance, while the reward system fails to properly encode accomplishments. There's a disconnect between actual performance and internal self-assessment, mediated by cognitive biases like discounting positives, attributing success to luck, and overweighting criticism. The prefrontal cortex's rational evaluation is overwhelmed by emotionally charged negative self-beliefs formed earlier in life. High achievers may have particularly strong impostor feelings because achievement contexts trigger heightened self-monitoring and comparison. The "organism as a team" approach helps by recognizing that your worth isn't contingent on performance, your team (trillions of cells) has been working successfully to keep you alive and functioning every single day. Achievements are collaborative efforts between your abilities and circumstances. Reframing success as your team's coordinated effort (not lucky accidents) and treating yourself with the compassion you'd give a struggling teammate helps recalibrate self-assessment circuits and reduce the impostor experience. ⚕️ This protocol does not replace professional consultation.