NCT04799821 is a NA clinical trial of Control in Healthy Diet, sponsored by University of Barcelona.

Who is sponsoring NCT04799821?

NCT04799821 is sponsored by University of Barcelona.

What drugs are being tested in NCT04799821?

Interventions in NCT04799821: Control, Walnut intake.

What condition does NCT04799821 study?

NCT04799821 studies Healthy Diet, Sleep.

Is NCT04799821 still recruiting?

NCT04799821 is currently completed. Last updated 29 November 2023.

Last reviewed 2023-11-29 · How we verify

NCT04799821

Name: Drug Landscape Pharmaceutical Database
Creator: Drug Landscape
Published: 2026-01-01
License: https://creativecommons.org/licenses/by/4.0/

The Role of Walnut Consumption on Sleep Quality

Completed NA Last updated 29 November 2023

What this trial tests

NA trial testing Control in Healthy Diet in 100 participants. Completed in 31 March 2023.

Timeline

1 February 2021

Primary endpoint
31 July 2022

31 March 2023

Quick facts

Lead sponsor	University of Barcelona
Phase	NA
Status	Completed
Study type	INTERVENTIONAL
Allocation	randomized
Design	crossover
Masking	none
Primary purpose	other
Enrollment	100
Start date	1 February 2021
Primary completion	31 July 2022
Estimated completion	31 March 2023
Sites	1 location across Spain

Drugs / interventions tested

Control
Walnut intake

Conditions studied

Healthy Diet — all drugs for Healthy Diet →
Sleep — all drugs for Sleep →

Sponsor

University of Barcelona

Who can join

Adults 20 to 40, any sex, with Healthy Diet or Sleep. Patients with the condition only — healthy volunteers not accepted.

Sponsor's own description

Walnuts have a unique nutritional profile, including the sleep-regulating hormone melatonin, tryptophan, and omega-3 fatty acids, the two latest nutrients involved in melatonin and serotonin synthesis. Although it has been claimed that walnuts may improve sleep, to the investigators' knowledge, no studies have been conducted to objectively determine the impact of walnut consumption on sleep and overall well-being. Therefore, this study aims to investigate the effect of daily walnut consumption on sleep parameters (such as quality and duration). Secondarily, it aims to investigate the impact of daily walnut consumption on body composition, eating behavior, and well-being.

Publications & conference data

1 peer-reviewed publication reference this trial (live from Europe PMC):

Daily walnut consumption increases 6-sulfatoxymelatonin urinary levels and can improve sleep quality: a randomized crossover trial.
Zerón-Rugerio MF, Ibarra-Picón A, Diez-Hernández M, Comas-Basté O, et al · · 2025 · cited 2× · PMID 40791136 · DOI 10.1039/d5fo00971e

Verify or expand the search:

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Trials testing the same drug.

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Other recruiting trials for Healthy Diet

Currently open trials in the same condition.

NCT04119791 — A Multidisciplinary Investigation of Cardiovascular Benefits of Wild Rice · NA · recruiting
NCT05869760 — Baylor Infant and Toddler Biomarker of Nutrition Study · recruiting
NCT04079855 — Monell USDA Taste Test Study · NA · active not recruiting
NCT05802797 — Bioavailability and Pharmacodynamics of EPA and DHA From Fortified Soymilk and Capsules · EARLY_PHASE1 · active not recruiting
NCT06698094 — Sustainable Office Intervention, Impact of a Sustainable Lifestyle on Diet, Physical Activity and Carbon Footprint · NA · active not recruiting

Other University of Barcelona trials

Trials by the same sponsor.

NCT07165964 — Nursing Interventions to Enhance Positive Mental Health and Self Care in Women During the Climacteric · NA · recruiting
NCT06384196 — Identity-Based Transdiagnostic Therapy for Young People With Anxiety and Depression · NA · recruiting
NCT06729697 — Pharmaceutical Literacy and Quality of Life in Spanish Population. · enrolling by invitation
NCT06478160 — Closed-blood Sampling Devices in the Adult Critically Ill Patient · NA · recruiting
NCT07172490 — Interdisciplinary Program to Improve Lifestyle in Chronic Pathology: Alt Pirineu Aran in Fit (APA-FIT) · NA · completed

Verify against primary sources

ClinicalTrials.gov — authoritative US registry record
WHO ICTRP — international registry index
EU Clinical Trials Register
Sponsor press releases (Google)

Data sources for this page

Trial protocol + status: ClinicalTrials.gov NCT04799821 (US National Library of Medicine, public domain)
Publications: Europe PMC API search by NCT ID, retrieved 10 June 2026
Drug + disease cross-links: matched in real time against Drug Landscape's normalised drug + company + condition tables
Sponsor: as reported to ClinicalTrials.gov by University of Barcelona
Last refreshed: 29 November 2023

Drug Landscape aggregates and links these public records for informational use only. Always verify against the primary source before clinical or regulatory decisions. Canonical URL: https://druglandscape.com/trial/NCT04799821.

Primary sources · FDA · ClinicalTrials.gov · EMA · SEC EDGAR · ChEMBL · Wikidata · full sourcing