Unravelling the ´healthy´ in a healthy lifestyle: Dietary influences on subjective wellbeing and physical health

Unravelling the ´healthy´ in a healthy lifestyle: Dietary influences on subjective wellbeing and physical health - Diet and Health

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00013702

Enrollment

128

Registered

2018-01-22

Start date

2018-08-20

Completion date

Unknown

Last updated

2025-04-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Impact of dietary behaviors on mental health, the metabolic, endocrine and immune system

Interventions

Group 1: Intervention group: n=64 male omnivores who participate in a 2-month ovo-lacto-vegetarian dietary intervention. Pre, during and after the intervention participants collect data on eating beha

Eligibility

Sex/Gender

Male

Age

18 Years to 45 Years

Inclusion criteria

Inclusion criteria: Body Mass Index 17 to 30kg/m2, language knowledge German fluent, dietary habit omnivor since 5 years

Exclusion criteria

Exclusion criteria: Exclusion criteria: any chronic physical or psychological disease (including diabetes mellitus, lifetime history of any eating disorder or alcohol and substance abuse disorders), intake of psychotropic drugs or drugs affecting biological systems under study (including glucocorticoids, beta blockers, lipid lowering drugs) on a regular basis, and recent medical treatment (e.g., vaccination within past two months, former radiation therapy for cancer), smoking

Design outcomes

Primary

Measure	Time frame
A. pre - post Oral Glucose Tolerance Test (OGTT) -> Glucose, Insulin und C-Peptid in blood pre, 30, 60, 90 and 120 minutes after 300ml/75g glucose drink B. pre - post psychobiological stress response to the Trier Social Stress Test (TSST): -> Adrenocorticotropin, Cortisol, Adrenaline and Noradrenaline, Interleukin-6, Tumor necrosis factor-alpha, immune cell distribution in blood -1, 15, 40 and 100 minutes after stress testing; -> salivary-Cortisol, salivary-alpha-Amylase -30, -1, 1, 10, 25, 40, 55, 70, 100 minutes after stress testing; State-Trait-Anxiety-Inventory-State Version STAI-S, Primary Appraisal Secondary Appraisal PASA pre and post stress testing C. pre, early and late intervention phase, post, follow-up diurnal profiles: salivary-Cortisol and –Alpha-Amylase at awakening, +30 minutes, 2pm, 6pm, bedtime; information on current wellbeing and control items (sleep, physical activity, current eating and drinking) at 2pm and 6pm every 3 days using electronic diary (2 to 4 minutes entry time per measurement time point)	—

Measure

Time frame

A. pre - post Oral Glucose Tolerance Test (OGTT) -> Glucose, Insulin und C-Peptid in blood pre, 30, 60, 90 and 120 minutes after 300ml/75g glucose drink B. pre - post psychobiological stress response to the Trier Social Stress Test (TSST): -> Adrenocorticotropin, Cortisol, Adrenaline and Noradrenaline, Interleukin-6, Tumor necrosis factor-alpha, immune cell distribution in blood -1, 15, 40 and 100 minutes after stress testing; -> salivary-Cortisol, salivary-alpha-Amylase -30, -1, 1, 10, 25, 40, 55, 70, 100 minutes after stress testing; State-Trait-Anxiety-Inventory-State Version STAI-S, Primary Appraisal Secondary Appraisal PASA pre and post stress testing C. pre, early and late intervention phase, post, follow-up diurnal profiles: salivary-Cortisol and –Alpha-Amylase at awakening, +30 minutes, 2pm, 6pm, bedtime; information on current wellbeing and control items (sleep, physical activity, current eating and drinking) at 2pm and 6pm every 3 days using electronic diary (2 to 4 minutes entry time per measurement time point)

—

Secondary

Measure	Time frame
does not apply	—

Countries

Germany

Contacts

Public ContactJana Strahler

Psychotherapie und Systemneurowissenschaften, Fachbereich Psychologie und Sportwissenschaften, JLU Gießen

jana.strahler@psychol.uni-giessen.de+49-641-99-26332

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026