How protein metabolism is affected by skipping breakfast

Do urine compositions related to protein metabolism change when skipping breakfast in healthy adults?: A preliminary study - Protein metabolism after skipping breakfast

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000055281

Enrollment

Registered

2024-08-19

Start date

2024-08-20

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Healthy

Interventions

Participants eat three test meals a day during the first four days of the five-day measurement period. After the washout period (more than 3 days), participants eat three test meals a day for the firs

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Students, teachers and other staffs in Toyo University

Exclusion criteria

Exclusion criteria: No able to eat the test meal Smoker Have a medical disease that can affect protein metabolism Regularly using supplements and medicines

Design outcomes

Primary

Measure	Time frame
Urinary [15N]-ammonia end-product enrichment after eating breakfast and skipping breakfast	—

Secondary

Measure	Time frame
Urinary [15N]-urea end-product enrichment, urinary 3-methylhistidine/creatinine ratio, urinary nitrogen excretion, and urinary ketone enrichment, energy expenditure, carbohydrate oxidation and fat oxidation after eating breakfast and skipping breakfast	—

Countries

Japan

Contacts

Public ContactTakahiro Yoshizaki

Toyo University Faculty of Health and Sports Sciences

yoshizaki@toyo.jp03-5924-2823

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026