NCT06215573

Brief Summary

Melatonin is a hormone naturally found in our body that increases in our blood at night and controls how we sleep. Melatonin can also be taken as a pill and numerous clinical trials have documented improved sleep quality following melatonin supplementation before bed. However, it is not known whether such supplements actually increase blood melatonin above normal levels, particularly at night. The aims of this study are to investigate whether a novel melatonin supplement (Ritual Sleep BioSeriesTM Melatonin) can increase blood melatonin in human participants at night, and to determine if taking the supplement before bed for two-weeks can improve sleep quality.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
15

participants targeted

Target at below P25 for not_applicable

Timeline
Completed

Started Dec 2023

Shorter than P25 for not_applicable

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Start

First participant enrolled

December 4, 2023

Completed
1 month until next milestone

First Submitted

Initial submission to the registry

January 10, 2024

Completed
12 days until next milestone

First Posted

Study publicly available on registry

January 22, 2024

Completed
3 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

April 18, 2024

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

April 18, 2024

Completed
Last Updated

March 30, 2025

Status Verified

March 1, 2025

Enrollment Period

5 months

First QC Date

January 10, 2024

Last Update Submit

March 25, 2025

Conditions

Keywords

melatoninpharmacokineticssleep quality

Outcome Measures

Primary Outcomes (2)

  • Pharmacokinetic

    Serum melatonin concentration area under curve

    10 hours

  • Sleep efficiency

    Sleep efficiency, as total time asleep as percentage of time in bed

    2 weeks

Secondary Outcomes (3)

  • Sleep diary

    2 weeks

  • Recovery and well being

    2 weeks

  • Sleep quality

    2 weeks

Study Arms (2)

Melatonin supplementation

EXPERIMENTAL

5mg melatonin supplement from Ritual Inc's BioSeries

Dietary Supplement: Melatonin

Placebo supplementation

PLACEBO COMPARATOR

Placebo supplement from Ritual Inc.

Dietary Supplement: Placebo supplement

Interventions

MelatoninDIETARY_SUPPLEMENT

5mg melatonin supplement, once daily, from Ritual BioSeries

Melatonin supplementation
Placebo supplementDIETARY_SUPPLEMENT

Placebo supplement, once daily, from Ritual BioSeries

Placebo supplementation

Eligibility Criteria

Age18 Years - 40 Years
Sexall
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Healthy
  • Aged 18-40
  • Sometimes have trouble sleeping (Pittsburgh sleep quality index score \>5)

You may not qualify if:

  • Routinely taking melatonin supplements or other drugs known to affect sleep
  • A diagnosed sleep disorder
  • Major psychiatric illness
  • Current physical injury
  • Known or suspected hypersensitivity to melatonin
  • Presence of major sleep disruptors at home (e.g. new born baby)
  • Night shift/rotational-shift work
  • Receiving non-pharmacological treatment for sleep disorder (e.g. cognitive behavioral therapy)
  • Substance use disorder
  • Recent (\<1 month) increase in daily caffeinated drink consumption
  • Consuming \>14 standard alcoholic drinks per week
  • Pregnant or lactating

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Sport & Health Sciences University of Exeter

Exeter, Devon, EX1 2LU, United Kingdom

Location

MeSH Terms

Conditions

Sleep Initiation and Maintenance Disorders

Interventions

Melatonin

Condition Hierarchy (Ancestors)

Sleep Disorders, IntrinsicDyssomniasSleep Wake DisordersNervous System DiseasesMental Disorders

Intervention Hierarchy (Ancestors)

TryptaminesIndolesHeterocyclic Compounds, 2-RingHeterocyclic Compounds, Fused-RingHeterocyclic CompoundsHormonesHormones, Hormone Substitutes, and Hormone Antagonists

Study Officials

  • Francis B Stephens, PhD

    University of Exeter

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
QUADRUPLE
Who Masked
PARTICIPANT, CARE PROVIDER, INVESTIGATOR, OUTCOMES ASSESSOR
Masking Details
Coded, known only to manufacturer / collaborator
Purpose
BASIC SCIENCE
Intervention Model
CROSSOVER
Model Details: Randomised cross over trial counterbalanced for trial order
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

January 10, 2024

First Posted

January 22, 2024

Study Start

December 4, 2023

Primary Completion

April 18, 2024

Study Completion

April 18, 2024

Last Updated

March 30, 2025

Record last verified: 2025-03

Data Sharing

IPD Sharing
Will not share

Locations