Self-control relies on glucose as a limited energy source: willpower is more than a metaphor.

The present work suggests that self-control relies on glucose as a limited energy source. Laboratory tests of self-control (i.e., the Stroop task, thought suppression, emotion regulation, attention control) and of social behaviors (i.e., helping behavior, coping with thoughts of death, stifling prejudice during an interracial interaction) showed that (a) acts of self-control reduced blood glucose levels, (b) low levels of blood glucose after an initial self-control task predicted poor performance on a subsequent self-control task, and (c) initial acts of self-control impaired performance on subsequent self-control tasks, but consuming a glucose drink eliminated these impairments. Self-control requires a certain amount of glucose to operate unimpaired. A single act of self-control causes glucose to drop below optimal levels, thereby impairing subsequent attempts at self-control.

[1]  Sigmund Freud,et al.  The Ego and the Id , 1923 .

[2]  Sigmund Freud,et al.  New Introductory Lectures on Psycho-Analysis , 1933 .

[3]  C. S. Read New Introductory Lectures on Psycho-analysis , 1934 .

[4]  S. Freud The Standard Edition of the Complete Psychological Works of Sigmund Freud , 1953 .

[5]  D. Marlowe,et al.  A new scale of social desirability independent of psychopathology. , 1960, Journal of consulting psychology.

[6]  N. Feather,et al.  The relationship of persistence at a task to expectation of success and achievement related motives. , 1961, Journal of abnormal and social psychology.

[7]  A. Jordan ADVANCES IN METABOLIC DISORDERS , 1965 .

[8]  J. Singer,et al.  Psychic cost of adaptation to an environmental stressor. , 1969, Journal of personality and social psychology.

[9]  G C Simpson,et al.  The effects of noise stress on blood glucose level and skilled performance. , 1974, Ergonomics.

[10]  R. Bolton Hostility in fantasy: A further test of the hypoglycemia‐aggression hypothesis , 1976 .

[11]  R. Lewontin ‘The Selfish Gene’ , 1977, Nature.

[12]  David A. Brown,et al.  Plasma glucose and lactic acid alterations in response to a stressful exam , 1979, Biological Psychology.

[13]  S. Wallace The Denial of Death , 1979, Occupational health nursing.

[14]  H Lund-Andersen,et al.  Transport of glucose from blood to brain. , 1979, Physiological reviews.

[15]  Philippe Ariès,et al.  The Hour of Our Death , 1982 .

[16]  M. Huttunen,et al.  Evidence for abnormal glucose tolerance test among violent offenders. , 1982, Neuropsychobiology.

[17]  A. Alavi,et al.  Positron emission tomographic studies of local cerebral glucose metabolism in humans in physiological and pathophysiological conditions. , 1983, Advances in metabolic disorders.

[18]  K. Bridges Test-Completion Speed: Its Relationship to Performance on Three Course-Based Objective Examinations , 1985 .

[19]  Volkmar Weiss,et al.  From memory span and mental speed toward the quantum mechanics of intelligence , 1986 .

[20]  Daniel T. Gilbert,et al.  Journal of Personality and Social Psychology of Thoughts Unspoken Social Inference and the Self-regulation of Behavior , 2022 .

[21]  J. Mayer,et al.  The Experience and Meta-Experience of Mood , 1988 .

[22]  D. Watson,et al.  Development and validation of brief measures of positive and negative affect: the PANAS scales. , 1988, Journal of personality and social psychology.

[23]  J. Greenberg,et al.  Evidence for terror management theory: I. The effects of mortality salience on reactions to those who violate or uphold cultural values. , 1989, Journal of personality and social psychology.

[24]  J. Bachorowski,et al.  Sucrose and delinquency: oral sucrose tolerance test and nutritional assessment. , 1990, Pediatrics.

[25]  Dylan M. Jones,et al.  Refining the measurement of mood: The UWIST Mood Adjective Checklist , 1990 .

[26]  Walter Mischel,et al.  Predicting adolescent cognitive and self-regulatory competencies from preschool delay of gratification: Identifying diagnostic conditions. , 1990 .

[27]  D. Benton The impact of increasing blood glucose on psychological functioning , 1990, Biological Psychology.

[28]  S. West,et al.  Multiple Regression: Testing and Interpreting Interactions. , 1994 .

[29]  J. McGill,et al.  Relationship of personality characteristics to glucose regulation in adults with diabetes. , 1991, Psychosomatic medicine.

[30]  Hunger: A sensitive but nonspecific symptom of hypoglycemia , 1993, Diabetes Care.

[31]  D. Benton,et al.  Is raised blood glucose associated with the relief of tension? , 1993, Journal of psychosomatic research.

[32]  R. Baumeister,et al.  Losing Control: How and Why People Fail at Self-Regulation , 1994 .

[33]  Larry E. Toothaker,et al.  Multiple Regression: Testing and Interpreting Interactions , 1991 .

[34]  D. Benton,et al.  The impact of raising blood glucose on reaction times. , 1994, Neuropsychobiology.

[35]  D. Benton,et al.  Blood glucose influences memory and attention in young adults , 1994, Neuropsychologia.

[36]  E. Bizzi,et al.  The Cognitive Neurosciences , 1996 .

[37]  H. Begleiter,et al.  The pharmacology of alcohol and alcohol dependence , 1996 .

[38]  B. Altura,et al.  Effects of alcohol on overall brain metabolism. , 1996 .

[39]  J. Greenberg,et al.  Suppression, accessibility of death-related thoughts, and cultural worldview defense: exploring the psychodynamics of terror management. , 1997, Journal of personality and social psychology.

[40]  A J Scheen,et al.  Roles of circadian rhythmicity and sleep in human glucose regulation. , 1997, Endocrine reviews.

[41]  K. Nagata [Brain energy metabolism]. , 1997, Nihon rinsho. Japanese journal of clinical medicine.

[42]  L. L. Grange,et al.  Adjudicated adolescent males: measures of urinary 5-hydroxyindoleacetic acid and reactive hypoglycemia , 1997 .

[43]  Robin I. M. Dunbar Social Brain Hypothesis , 1998, Encyclopedia of Evolutionary Psychological Science.

[44]  R. Baumeister,et al.  Ego depletion: is the active self a limited resource? , 1998, Journal of personality and social psychology.

[45]  P. Devine,et al.  Internal and external motivation to respond without prejudice , 1998 .

[46]  R. Baumeister,et al.  Self-control as limited resource: regulatory depletion patterns. , 1998, Journal of personality and social psychology.

[47]  D. Benton,et al.  Blood glucose control and aggressiveness in females , 1999 .

[48]  R. Baumeister,et al.  Self-regulation and depletion of limited resources: does self-control resemble a muscle? , 2000, Psychological bulletin.

[49]  Kathleen D. Vohs,et al.  PSYCHOLOGICAL SCIENCE Research Article SELF-REGULATORY FAILURE: A Resource-Depletion Approach , 2022 .

[50]  T. Pratt,et al.  THE EMPIRICAL STATUS OF GOTTFREDSON AND HIRSCHI'S GENERAL THEORY OF CRIME: A META‐ANALYSIS , 2000 .

[51]  P. E. Gold,et al.  Fluctuations in Brain Glucose Concentration during Behavioral Testing: Dissociations between Brain Areas and between Brain and Blood , 2001, Neurobiology of Learning and Memory.

[52]  Jeff Schimel,et al.  Clarifying the Function of Mortality Salience-Induced Worldview Defense: Renewed Suppression or Reduced Accessibility of Death-Related Thoughts? , 2001 .

[53]  E. Finkel,et al.  Self-control and accommodation in close relationships: an interdependence analysis. , 2001, Journal of personality and social psychology.

[54]  R. L. Collins,et al.  Self-control and alcohol restraint: an initial application of the self-control strength model. , 2002, Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors.

[55]  C. L. Wyland,et al.  An fMRI investigation of the impact of interracial contact on executive function , 2003, Nature Neuroscience.

[56]  M. Muraven,et al.  Mechanisms of Self-Control Failure: Motivation and Limited Resources , 2003, Personality & social psychology bulletin.

[57]  J. Polivy,et al.  Conformity and dietary disinhibition: a test of the ego-strength model of self-regulation. , 2003, The International journal of eating disorders.

[58]  K. Vohs,et al.  Intellectual performance and ego depletion: role of the self in logical reasoning and other information processing. , 2003, Journal of personality and social psychology.

[59]  E. Plant Responses to Interracial Interactions Over Time , 2004, Personality & social psychology bulletin.

[60]  A. van Knippenberg,et al.  Consequences of Stereotype Suppression and Internal Suppression Motivation: A Self-Regulation Approach , 2004, Personality & social psychology bulletin.

[61]  Ronald J. Faber,et al.  To buy or not to buy?: Self-control and self-regulatory failure in purchase behavior. , 2004 .

[62]  S. Fairclough,et al.  A metabolic measure of mental effort , 2004, Biological Psychology.

[63]  Simon B. Laughlin,et al.  The Implications of Metabolic Energy Requirements for the Representation of Information in Neurons. , 2004 .

[64]  K. Vohs,et al.  Handbook of self-regulation : research, theory, and applications , 2004 .

[65]  M. Gazzaniga The cognitive neurosciences, 3rd edition , 2004 .

[66]  R. Baumeister,et al.  High self-control predicts good adjustment, less pathology, better grades, and interpersonal success. , 2004, Journal of personality.

[67]  R. Baumeister The Cultural Animal , 2005 .

[68]  K. Vohs,et al.  Self-regulation and self-presentation: regulatory resource depletion impairs impression management and effortful self-presentation depletes regulatory resources. , 2005, Journal of personality and social psychology.

[69]  Angela L. Duckworth,et al.  Self-Discipline Outdoes IQ in Predicting Academic Performance of Adolescents , 2005, Psychological science.

[70]  J. Richeson,et al.  Why do interracial interactions impair executive function? A resource depletion account. , 2005, Journal of personality and social psychology.

[71]  Mark Muraven,et al.  Daily fluctuations in self-control demands and alcohol intake. , 2005, Psychology of addictive behaviors : journal of the Society of Psychologists in Addictive Behaviors.

[72]  J. N. Shelton,et al.  African Americans' Implicit Racial Attitudes and the Depletion of Executive Function after Interracial Interactions. , 2005 .

[73]  R. Baumeister,et al.  Self-regulatory processes defend against the threat of death: Effects of self-control depletion and trait self-control on thoughts and fears of dying. , 2006, Journal of personality and social psychology.

[74]  M. Muraven,et al.  Conserving self-control strength. , 2006, Journal of personality and social psychology.

[75]  R. Baumeister,et al.  Ego depletion and aggressive behavior: Is the inhibition of aggression a limited resource? , 2006 .

[76]  C. Nathan DeWall,et al.  Violence restrained: Effects of self-regulation and its depletion on aggression , 2007 .