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Healthy ageing at work- Efficacy of group interventions on the mental health of nurses aged 45 and older: Results of a randomised, controlled trial.
Maatouk, I, Müller, A, Angerer, P, Schmook, R, Nikendei, C, Herbst, K, Gantner, M, Herzog, W, Gündel, H
PloS one. 2018;13(1):e0191000
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According to the German statistics office, nurses frequently suffer from emotional distress or mental disorders, due to the physical and social demands of the nursing profession in comparison to other professions. The high psychological burden was one of the main factors that was associated with an intention to leave the nursing profession by nurses. The aim of this study was to implement an intervention programme for nursing staff aged 45 and older, with the primary purpose of reducing work-related distress in order to maintain mental health and wellbeing until retirement age. The intervention included several strategies for stress prevention including group dynamic principles and cognitive behavioural techniques. Nurses attended seven weekly session of 120 min with a booster session after six weeks as part of a randomised control trial carried out in four hospital sites in Germany. The outcomes were measured via self –reported questionnaire. Significant positive effects were noted in relation to mental health, but with regards to psychological health only small significant effect was noted in the intervention group. The authors concluded that the ageing workforce should be reached via a specifically designed intervention adapted to their profession.
Abstract
OBJECTIVE This multicentre, randomised controlled trial (RCT) aimed to evaluate the efficacy of a small-group intervention promoting successful ageing at work in older nurses (aged ≥45). METHOD A sample of 115 nurses aged ≥45 from 4 trial sites in Germany were randomly assigned to either the intervention group (IG), that received a small-group intervention of seven weekly sessions of 120 min with a booster session after six weeks or to a wait-list control condition (WLC). Outcomes were measured via validated self-report questionnaires at baseline (T1) and at post-treatment (T2). Primary outcomes were mental health-related well-being and mental health-related quality of life (QOL). The secondary outcomes included mental health-related and work-related measures. RESULTS The intention to treat (ITT) analysis showed significant positive effects of the intervention on mental health. A significant small effect (d = 0.3) in favour of the IG was found for psychological health-related quality of life. Positive small effects (d = 0.24 to d = 0.31) were also found for work related mental strain. CONCLUSIONS Our small-group intervention based on a theory of successful ageing for nurses aged ≥45 was found to be effective with regard to improvements of psychological health related quality of life and other mental health-related outcomes. Thus, our study shows that the ageing workforce can be reached through specifically designed preventive interventions. The components of our intervention could be easily adapted to the belongings of other professions. Our results suggest that these components should be evaluated in various settings outside the healthcare sector.
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A mindfulness-based intervention to increase resilience to stress in university students (the Mindful Student Study): a pragmatic randomised controlled trial.
Galante, J, Dufour, G, Vainre, M, Wagner, AP, Stochl, J, Benton, A, Lathia, N, Howarth, E, Jones, PB
The Lancet. Public health. 2018;3(2):e72-e81
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There has been a recent increase in students accessing university counselling services, though the reasons for this are currently unclear. Mindfulness-based stress reduction has gained increased attention as evidence has shown mindfulness training can improve anxiety and depression. The aim of this trial was to therefore assess whether a mindfulness course, Mindfulness Skills for Students (MSS), would improve university students’ resilience to stress. Participants were randomly assigned to either enrol in the 8-week MSS course alongside mental health support or receive mental health support alone. A total of 449 participants completed the study and self-reported psychological distress was the primary outcome. Students enrolled in MSS showed reduced distress scores during the examination period compared with those receiving support as usual. Based on these results, the authors conclude that offering mindfulness training could be an effective, feasible component of a wider university mental health strategies. Further controlled studies are required to better understand preventative mental health interventions for students.
Abstract
BACKGROUND The rising number of young people going to university has led to concerns about an increasing demand for student mental health services. We aimed to assess whether provision of mindfulness courses to university students would improve their resilience to stress. METHODS We did this pragmatic randomised controlled trial at the University of Cambridge, UK. Students aged 18 years or older with no severe mental illness or crisis (self-assessed) were randomly assigned (1:1), via remote survey software using computer-generated random numbers, to receive either an 8 week mindfulness course adapted for university students (Mindfulness Skills for Students [MSS]) plus mental health support as usual, or mental health support as usual alone. Participants and the study management team were aware of group allocation, but allocation was concealed from the researchers, outcome assessors, and study statistician. The primary outcome was self-reported psychological distress during the examination period, as measured with the Clinical Outcomes in Routine Evaluation Outcome Measure (CORE-OM), with higher scores indicating more distress. The primary analysis was by intention to treat. This trial is registered with the Australia and New Zealand Clinical Trials Registry, number ACTRN12615001160527. FINDINGS Between Sept 28, 2015, and Jan 15, 2016, we randomly assigned 616 students to the MSS group (n=309) or the support as usual group (n=307). 453 (74%) participants completed the CORE-OM during the examination period and 182 (59%) MSS participants completed at least half of the course. MSS reduced distress scores during the examination period compared with support as usual, with mean CORE-OM scores of 0·87 (SD 0·50) in 237 MSS participants versus 1·11 (0·57) in 216 support as usual participants (adjusted mean difference -0·14, 95% CI -0·22 to -0·06; p=0·001), showing a moderate effect size (β -0·44, 95% CI -0·60 to -0·29; p<0·0001). 123 (57%) of 214 participants in the support as usual group had distress scores above an accepted clinical threshold compared with 88 (37%) of 235 participants in the MSS group. On average, six students (95% CI four to ten) needed to be offered the MSS course to prevent one from experiencing clinical levels of distress. No participants had adverse reactions related to self-harm, suicidality, or harm to others. INTERPRETATION Our findings show that provision of mindfulness training could be an effective component of a wider student mental health strategy. Further comparative effectiveness research with inclusion of controls for non-specific effects is needed to define a range of additional, effective interventions to increase resilience to stress in university students. FUNDING University of Cambridge and National Institute for Health Research Collaboration for Leadership in Applied Health Research and Care East of England.
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The influence of hazardous drinking on psychological functioning, stress and sleep during and after treatment in patients with mental health problems: a secondary analysis of a randomised controlled intervention study.
Strid, C, Andersson, C, Öjehagen, A
BMJ open. 2018;8(3):e019128
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Hazardous drinking can negatively affect physical and mental health. It is unclear how hazardous drinking influences the chance of success of treatment in people with mental health problems. The aim of this study was to examine whether hazardous drinking, measured using a scale called AUDIT-C (Alcohol Use Disorders Identification Test-Consumption), influences psychological functioning, stress and sleep, during and after treatment in patients with mental ill health. This study was part of a larger trial aimed at comparing Internet-based cognitive-behaviour therapy (CBT) and physical exercise with usual treatment on patients with mental ill health. The study involved 871 participants who completed the AUDIT at baseline and were assessed during and after treatment on psychological functioning, stress and sleep. At baseline, hazardous drinkers were more depressed and had lower scores on psychological functioning than non-hazardous drinkers, while there were no differences on stress and sleep. During the follow-ups, hazardous drinking negatively influenced perception of stress, and the results remained after controlling for depression. There were no differences during the follow-ups regarding psychological functioning and sleep. The findings of the study emphasise the importance of screening for alcohol habits in mental health patients, since risky drinking may affect the outcomes of treatment.
Abstract
OBJECTIVES Hazardous drinking could negatively affect health and lead to alcohol use disorders, but it is unclear how hazardous drinking affects treatment outcomes of depression and anxiety and stress-related mental health problems. The aim of this study was to examine whether hazardous drinking, measured by Alcohol Use Disorders Identification Test-Consumption (AUDIT-C), influences the outcomes of repeated assessments of psychological functioning (Outcome Questionnaire-45), stress (Perceived Stress Scale) and sleep (Karolinska Sleep Questionnaire), during and after treatment in patients with mental ill health. METHODS The study was conducted within REGASSA, a randomised controlled trial aimed at comparing Internet-based cognitive-behaviour therapy and physical exercise with treatment as usual on primary care patients with mental ill health. The study involved 871 participants who completed the AUDIT at baseline and who were assessed repeatedly during and after treatment on psychological functioning, stress and sleep by interactive voice response, a computerised, automated telephone technology. RESULTS At baseline, hazardous drinkers were more depressed and had lower scores on psychological functioning than non-hazardous drinkers, while there were no differences on stress and sleep. During the follow-ups, hazardous drinking negatively influenced perceived stress, that is, hazardous drinkers seemed to have less treatment effect on stress, and the results remained after controlling for depression. There were no differences during the follow-ups regarding psychological functioning and sleep. CONCLUSIONS Hazardous drinking negatively influenced perceived stress. The findings of the study emphasise the importance of screening for alcohol habits in mental ill-health patients, since risky drinking may affect the outcomes of treatment. TRIAL REGISTRATION NUMBER DRKS00008745; Post-results.
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Effect of Mindfulness-Based Stress Reduction Therapy on Work Stress and Mental Health of Psychiatric Nurses.
Yang, J, Tang, S, Zhou, W
Psychiatria Danubina. 2018;30(2):189-196
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Many studies have found mindfulness-based stress reduction (MBSR) therapy to significantly reduce stress levels and enhance wellbeing. Among healthcare practitioners, psychiatric nurses experience higher stress and poorer mental health. Therefore the aim of this study was to examine the effects of MBSR on the mental health of 100 psychiatric nurses in China. Nurses were randomised to either receive psychological support including MBSR or to receive psychological support without MBSR weekly. Mental health assessments were taken at baseline and completion of the intervention. This study found that while all participants showed improvements in mental health, those receiving MBSR experienced significant improvement compared with the control group. Based on these results the authors conclude that MBSR therapy is conducive to reducing work-related stress of psychiatric nurses.
Abstract
BACKGROUND Psychiatric nurses are a special group of nursing staff, they experience greater work stress and lower mental health levels than regular nurses. In order to address this problem, the effect of mindfulness-based stress reduction (MBSR) therapy on work stress and mental health of psychiatric nurses is investigated in this study. SUBJECTS AND METHODS From August 2017 to November 2017, 100 psychiatric nurses, including 68 females and 32 males, were selected as participants from three hospitals in Hunan Province of China. They were randomly divided into the intervention and control groups, with 50 respondents in each group. MBSR therapy was used as psychological intervention in the intervention group. Before and after the intervention, the two groups were assessed with the Symptom Checklist-90 (SCL-90) scale, Self-Rating Depression Scale (SDS), Self-Rating Anxiety Scale (SAS), and Nursing Stress Scale. RESULTS (1) After the intervention, the SCL-90 score of the intervention group decrease significantly, and a statistically significant difference is observed with the figure before the intervention (P<0.001). No statistically significant difference is found in the control group (P>0.05). (2) After the intervention, the SDS and SAS scores of the intervention group decrease significantly, and a statistically significant difference is observed with the figures before the intervention (P<0.001). No statistically significant difference is found in the control group (P>0.05). (3) After the intervention, the Nursing Stress Scale score of the intervention group Nursing Stress Scale decrease significantly, and a statistically significant difference is observed with the figure before the intervention (P<0.001). No statistically significant difference is found in the control group (P>0.05). CONCLUSIONS MBSR therapy can reduce work stress, anxiety, depression, and other negative emotions among psychiatric nurses and improve their mental health.
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A yeast fermentate improves gastrointestinal discomfort and constipation by modulation of the gut microbiome: results from a randomized double-blind placebo-controlled pilot trial.
Pinheiro, I, Robinson, L, Verhelst, A, Marzorati, M, Winkens, B, den Abbeele, PV, Possemiers, S
BMC complementary and alternative medicine. 2017;17(1):441
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Background: The impact of constipation on quality of life is comparable to that caused by serious chronic conditions. Gastrointestinal motility and gut microbiota are closely associated as suggested in several studies. The bulk effect attributed to fibres is well recognized, and is behind the reason why an increase in fibre intake is recommended to ameliorate constipation. Aims & objectives: The aim of this pilot study was to investigate the long term effect of administration of EpiCor fermentate on GI discomfort by treating a population with symptoms of constipation in a randomised control double blind study. Method: Individuals that actually suffered from constipation were recruited and study population was stratified into two subgroups: one larger group with marked symptoms of GI discomfort (severe subgroup, n = 55) and a second group having milder symptoms (moderate subgroup, n = 25). Result & Conclusion: The result from this study suggest that constipation is associated with a dysfunctional gut microbiome, and evidences support that gut motility can be managed by intervening at the level of the gut microbial. In addition, fibres or other dietary supplements with prebiotic may modulate the gut microbiome resulting in improved gut discomfort with improved quality of life.
Abstract
BACKGROUND Constipation and symptoms of gastrointestinal discomfort such as bloating are common among otherwise healthy individuals, but with significant impact on quality of life. Despite the recognized contribution of the gut microbiome to this pathology, little is known about which group(s) of microorganism(s) are playing a role. A previous study performed in vitro suggests that EpiCor® fermentate has prebiotic-like properties, being able to favorably modulate the composition of the gut microbiome. Therefore, the aim of this study was to investigate the effects of EpiCor fermentate in a population with symptoms of gastrointestinal discomfort and reduced bowel movements and to evaluate its effect at the level of the gut microbiome. METHODS This pilot study was performed according to a randomized, double-blind, placebo-controlled parallel design. Eighty subjects with symptoms of gastrointestinal discomfort and constipation were allocated to one of two trial arms (placebo or EpiCor fermentate). Randomization was done in a stratified manner according to symptom severity, resulting in two subgroups of patients: severe and moderate. Daily records of gastrointestinal symptoms were assessed on a 5-point scale, and also stool frequency and consistency were documented during a 2-week run-in and a 6-week intervention phases. Averages over two-week intervals were calculated. Constipation-associated quality of life and general perceived stress were assessed at baseline and after 3 and 6 weeks of intervention. Fecal samples were also collected at these same time points. RESULTS EpiCor fermentate led to a significant improvement of symptoms such as bloating/distension (p = 0.033 and p = 0.024 after 2 and 4 weeks of intervention, respectively), feeling of fullness (p = 0.004 and p = 0.023 after 2 and 4 weeks of intervention, respectively) and general daily scores (p = 0.046 after 2 weeks of intervention) in the moderate subgroup. A significant improvement in stool consistency was observed for the total population (p = 0.023 after 2 weeks of intervention) as well as for the severe subgroup (p = 0.046 after 2 weeks of intervention), and a nearly significant increase in stool frequency was detected for the total cohort (p = 0.083 and p = 0.090 after 2 and 4 weeks of intervention, respectively). These effects were accompanied by an improvement in constipation-associated quality of life and general perceived stress, particularly in the moderate subgroup. Members of the families Bacteroidaceae and Prevotellaceae, two groups of bacteria that have been previously reported to be deficient in constipated patients, were found to increase with EpiCor fermentate in the severe subgroup. In the moderate subgroup, a significant increase in Akkermansia muciniphila was observed. CONCLUSIONS Despite the relatively low dose administered (500 mg/day), particularly when comparing to the high recommended doses for prebiotic fibers, EpiCor fermentate was able to modulate the composition of the gut microbiome, resulting in improvement of constipation-associated symptoms. Conversely, the reported increase in bowel movements may have altered the gut microbial community by increasing those groups of bacteria that are better adapted to a faster gastrointestinal transit time. TRIAL REGISTRATION NCT03051399 at ClinicalTrials.gov. Retrospectively registered. Registration date: 13 February 2017.
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Effects of Oral Vitamin C Supplementation on Anxiety in Students: A Double-Blind, Randomized, Placebo-Controlled Trial.
de Oliveira, IJ, de Souza, VV, Motta, V, Da-Silva, SL
Pakistan journal of biological sciences : PJBS. 2015;18(1):11-8
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Vitamin C (ascorbic acid) is a well known anti-oxidant that has been studied in relation to anxious behaviour triggered by stressful situations. This study set out to examine the effects of vitamin C (50mg per day) or placebo on 42 high school students in a double-blind, randomised, placebo controlled trial. Levels of anxiety were measured before and after a 14 day supplementation of vitamin C or placebo using the Beck Anxiety Inventory. Plasma levels of vitamin C, heart rate and blood pressure were also measured. The results showed vitamin C supplementation reduced anxiety levels and increased plasma vitamin C levels. There was also a significant decrease in heart rate. There was no significant difference in blood pressure. The study concluded that vitamin C has a therapeutic affect on reducing anxiety levels. It was recommend high schools implement nutritional programs high in antioxidants such as vitamin C to reduce anxiety and improve academic performance.
Abstract
Vitamin C ascorbic acid) is a well-known antioxidant that is involved in anxiety, stress, depression, fatigue and mood state in humans. Studies have suggested that oxidative stress may trigger neuropsychological disorders. Antioxidants may play an important therapeutic role in combating the damage caused by oxidative stress in individuals that suffer from anxiety. In this context, it was hypothesized that oral vitamin C supplementation would reduce anxiety. However, few up to date studies have evaluated the consequences of oral vitamin C supplementation on anxiety in humans. The present study examined the effects of oral vitamin C supplements in 42 high school students, in a randomized, double-blind, placebo-controlled trial. The students were given either vitamin C (500 mg day(-1)) or placebo. Plasma concentrations of vitamin C and blood pressure were measured before the intervention and then one day after the intervention. Anxiety levels were evaluated for each student before and after 14 days following supplementation with the Beck Anxiety Inventory. Results showed that vitamin C reduced anxiety levels and led to higher plasma vitamin C concentration compared to the placebo. The mean heart rates were also significantly different between vitamin C group and placebo control group. Present study results not only provide evidence that vitamin C plays an important therapeutic role for anxiety but also point a possible use for antioxidants in the prevention or reduction of anxiety. This suggests that a diet rich in vitamin C may be an effective adjunct to medical and psychological treatment of anxiety and improve academic performance.
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No effect of caloric restriction on salivary cortisol levels in overweight men and women.
Tam, CS, Frost, EA, Xie, W, Rood, J, Ravussin, E, Redman, LM
Metabolism: clinical and experimental. 2014;63(2):194-8
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Alterations in normal cortisol patterns have been observed in people who are obese. The effect of weight loss on cortisol levels, a measure of hypothalamic pituitary adrenal (HPA) activity, in overweight individuals is not known. The aim of this study was to test the hypothesis that 6 months of moderate caloric restriction would alter morning and diurnal salivary cortisol levels. Thirty-five overweight adults (average BMI 27.8 kg/m2) took part in this randomised control trial. Participants were assigned to either calorie restriction (CR: 25% reduction in energy intake), calorie restriction+exercise (CR+EX: 12.5% reduction in energy intake+12.5% increase in exercise energy expenditure) or control (healthy weight-maintenance diet) for 6 months. Salivary cortisol was measured at 8:00, 8:30, 11:00, 11:30, 12:30, 13:00, 16:00 and 16:30. Morning cortisol was defined as the mean cortisol concentration at 08:00 and 08:30. Diurnal cortisol was calculated as the mean of the 8 cortisol measures across the day. Across all groups, higher morning and diurnal cortisol levels were associated with impaired insulin sensitivity. There was no significant effect of group, time or sex on morning or diurnal cortisol levels. The authors concluded that a 10% weight loss with a 25% CR diet alone or with exercise did not impact morning or diurnal salivary cortisol levels in overweight individuals. Their findings suggest that prolonged restriction of energy intake is not perceived by the body as a stressor, and therefore CR may present a viable intervention.
Abstract
OBJECTIVE The effect of weight loss by diet or diet and exercise on salivary cortisol levels, a measure of hypothalamic pituitary adrenal activity, in overweight individuals is not known. The objective was to test the hypothesis that 24 weeks of moderate caloric restriction (CR) (25%) by diet or diet and aerobic exercise would alter morning and diurnal salivary cortisol levels. DESIGN AND SETTING Randomized control trial in an institutional research center. PARTICIPANTS Thirty-five overweight (BMI: 27.8±0.7 kg/m(2)) but otherwise healthy participants (16 M/19 F). INTERVENTION Participants were randomized to either calorie restriction (CR: 25% reduction in energy intake, n=12), calorie restriction+exercise (CR+EX: 12.5% reduction in energy intake+12.5% increase in exercise energy expenditure, n=12) or control (healthy weight-maintenance diet, n=11) for 6 months. MAIN OUTCOME MEASURE Salivary cortisol measured at 8:00, 8:30, 11:00, 11:30, 12:30, 13:00, 16:00 and 16:30. Morning cortisol was defined as the mean cortisol concentration at 08:00 and 08:30. Diurnal cortisol was calculated as the mean of the 8 cortisol measures across the day. RESULTS In the whole cohort, higher morning and diurnal cortisol levels were associated with impaired insulin sensitivity (morning: P=0.004, r(2)=0.24; diurnal: P=0.02, r(2)=0.15). Using mixed model analysis, there was no significant effect of group, time or sex on morning or diurnal cortisol levels. CONCLUSION A 10% weight loss with a 25% CR diet alone or with exercise did not impact morning or diurnal salivary cortisol levels.
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Lack of effect of high-protein vs. high-carbohydrate meal intake on stress-related mood and eating behavior.
Lemmens, SG, Martens, EA, Born, JM, Martens, MJ, Westerterp-Plantenga, MS
Nutrition journal. 2011;10:136
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Previous research has shown that overweight people may eat during times of stress, even in the absence of hunger. Alongside this, people are more likely to eat calorific ‘comfort’ foods to cope with feelings of stress, even though these foods may add to physiological stress levels. This study explored whether different macronutrients (protein vs carbohydrate) influenced stress-related eating behaviour. This was a randomized cross-over trial with 38 adults (19 men, 19 women) investigating the effects of a high-protein vs. high-carbohydrate meal on the stress-induced psychological mood response, the rewarding value of food (‘liking’ and ‘wanting’), and the stress-induced food choice and subsequent food intake. Participants were tested in four conditions: 1) a stress condition, with a consumption of a high-protein meal; 2) a rest condition, with a consumption of a high-protein meal; 3) a stress condition, with a consumption of a high-carbohydrate meal; 4) a rest condition, with a consumption of a high-carbohydrate meal. A difficult IQ test with not enough time to solve the questions was used to simulate the stress conditions, while an easy version of the test with plenty of time to solve the questions was used for the rest conditions. Food reward and food choice were measured using psychometric questionnaires, while the subsequent energy intake was calculated based on the consumed 'wanted' food items, chosen by the participants during the psychometric tests. The results of this study showed no greater feelings of satiety in the high-protein vs. high-carbohydrate groups, with no significant differences in food choice or intake between the groups following the stress/rest tests. Decreased ‘wanting’ and energy intake was only seen in participants with high tendency to overeat ("disinhibited eating pattern"), and only during the rest condition, after the consumption of a high-protein meal. This effect, however, disappeared under the stress condition. The authors conclude that the consumption of a high-protein meal, compared with a high-carbohydrate meal, appears to have limited impact on stress-related eating behaviour.
Abstract
BACKGROUND Consumption of meals with different macronutrients, especially high in carbohydrates, may influence stress-related eating behavior. We aimed to investigate whether consumption of high-protein vs. high-carbohydrate meals influences stress-related mood, food reward, i.e. 'liking' and 'wanting', and post-meal energy intake. METHODS Participants (n = 38, 19m/19f, age = 25 ± 9 y, BMI = 25.0 ± 3.3 kg/m2) came to the university four times, fasted, once for a stress session receiving a high-protein meal, once for a rest session receiving a high-protein meal, once for a stress session receiving a high-carbohydrate meal and once for a rest session receiving a high-carbohydrate meal (randomized cross-over design). The high-protein and high-carbohydrate test meals (energy percentage protein/carbohydrate/fat 65/5/30 vs. 6/64/30) matched for energy density (4 kJ/g) and daily energy requirements (30%). Stress was induced using an ego-threatening test. Pre- and post-meal 'liking' and 'wanting' (for bread, filling, drinks, dessert, snacks, stationery (non-food alternative as control)) was measured by means of a computer test. Following the post-meal 'wanting' measurement, participants received and consumed their wanted food items (post-meal energy intake). Appetite profile (visual analogue scales), mood state (Profile Of Mood State and State Trait Anxiety Inventory questionnaires), and post-meal energy intake were measured. RESULTS Participants showed increased feelings of depression and anxiety during stress (P < 0.01). Consumption of the test meal decreased hunger, increased satiety, decreased 'liking' of bread and filling, and increased 'liking' of placebo and drinks (P < 0.0001). Food 'wanting' decreased pre- to post-meal (P < 0.0001). The high-protein vs. high-carbohydrate test meal induced lower subsequent 'wanting' and energy intake (1.7 ± 0.3 MJ vs. 2.5 ± 0.4 MJ) only in individuals characterized by disinhibited eating behavior (factor 2 Three Factor Eating Questionnaire, n = 16), during rest (P ≤ 0.01). This reduction in 'wanting' and energy intake following the high-protein meal disappeared during stress. CONCLUSIONS Consumption of a high-protein vs. high-carbohydrate meal appears to have limited impact on stress-related eating behavior. Only participants with high disinhibition showed decreased subsequent 'wanting' and energy intake during rest; this effect disappeared under stress. Acute stress overruled effects of consumption of high-protein foods. TRIAL REGISTRATION The study was registered in the Dutch Trial Register (NTR1904). The protocol described here in this study deviates from the trial protocol approved by the Medical Ethical Committee of the Maastricht University as it comprises only a part of the approved trial protocol.