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CompletedNCT06053385Updated Sep 28, 2023

Impact of Commercial "Sleep Lotion" on Salivary Melatonin Levels and Sleep Quality in Undergraduates

An interventional study of Melatonin sleep lotion and Placebo control lotion in Sleep, sponsored by University of Redlands. Completed at 1 site in United States. Open to participants aged 18 Years to 24 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2023-09-28.

Sponsored by University of Redlands · Not applicable, Interventional, and Basic science

From the registry’s dates

  • Registered 1 year 7 months after the study started (first participant enrolled Feb 2022, registered Sep 2023).
Phase
Not applicable
Study type
Interventional
Enrollment
63
Allocation
Randomized
Ages
18 Years to 24 Years
Sex
All
01

Study summary

The goal of this clinical trial is to test an over-the-counter "sleep lotion" in healthy undergraduate college students. The main questions it aims to answer are:

  • Does an over-the-counter "sleep lotion" containing melatonin actually increase melatonin levels in participants compared to a placebo (control) lotion?
  • Does an over-the-counter "sleep lotion" containing melatonin improve the quality of participants' sleep compared to a placebo (control) lotion?

Participants will:

  • provide three saliva samples on each of two nights
  • apply melatonin-containing "sleep lotion" on one night and a placebo (control with no melatonin) lotion on the other night
  • answer questionnaires about gender, race, ethnicity, medication use, exercise, and sleep quality
Read the detailed description

Melatonin is a hormone secreted by the pineal gland in the brain that regulates sleep. There are many over-the-counter products such as bubble baths, room sprays, and lotions that claim they contain melatonin and promote sleep. This study is a randomized, controlled, double-blind crossover trial to compare the impact of a commercial "sleep lotion" vs. a control lotion on melatonin levels detectable in saliva in healthy undergraduate students. Participants will provide saliva samples on two nights, one week apart, one hour before bedtime. The sample collections will take place just before and twice after applying 1) a melatonin lotion and 2) a placebo control lotion (order randomized). The investigators will determine whether the melatonin lotion affects the natural rise of melatonin before bedtime. A second dependent variable will be the quality of sleep on both nights. Potential confounding independent variables, such as gender, race, ethnicity, medication use, and exercise will also be assessed.

02

Conditions studied

  • Sleep

Keywords

  • melatonin
  • lotion
03

In context

Lead sponsor

University of Redlands is the lead sponsor of 7 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 24 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • 18 to 24 years old
  • current University of Redlands student

Exclusion criteria

Exclusion Criteria:

  • Pregnancy
  • currently taking any sleep medications
  • allergies or sensitivities to scented lotion
05

Study design

Phase
Not applicable
Primary purpose
Basic science
Allocation
Randomized
Intervention model
Crossover assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
63 participants (actual)

Study arms

  • Experimental
    Melatonin sleep lotion Night 1; Placebo control lotion Night 2

    Participants in this arm received melatonin-containing "sleep lotion" to apply on the first night of saliva sampling. On the second night of saliva sampling, they received placebo control lotion.

    Other: Melatonin sleep lotion · Other: Placebo control lotion

  • Experimental
    Placebo control lotion Night 1; Melatonin sleep lotion Night 2

    Participants in this arm received placebo control lotion to apply on the first night of saliva sampling. On the second night of saliva sampling, they received melatonin-containing "sleep lotion."

    Other: Melatonin sleep lotion · Other: Placebo control lotion

Interventions

  • OtherMelatonin sleep lotion

    7 g of lotion applied to hands and arms one hour before bedtime

    Also known as: Dr. Teal's Sleep Lotion

  • OtherPlacebo control lotion

    7 g of lotion applied to hands and arms one hour before bedtime

    Also known as: Dr. Teal's Lavender Essential Oils Lotion

06

What researchers measure

Primary outcomes

  1. Salivary melatonin

    pg/ml of melatonin in saliva measured by enzyme-linked immunosorbent assay

    Time frame: Three samples over an hour: pre-lotion application (one hour before bedtime), 30 minutes after lotion application, and one hour after lotion application (at bedtime). This 1 hr sampling will happen on two separate nights within a week of enrollment.

  2. Sleep Quality

    Modified Pittsburgh Sleep Quality Index. Scores from 0 (good sleep quality) to 14 (poor sleep quality)

    Time frame: A 15 minute questionnaire taken each morning after lotion application and saliva sampling. These two mornings are both within a week of enrollment (specific dates chosen by participant).

07

Study locations

1 site
  • University of Redlands
    Redlands, California 92373, United States
08

References and documents

Individual participant data

Plan to share: Yes — Anonymized participant data will be provided upon request

Supporting information: Study protocol, Sap, Icf

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 28, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT06053385
Lead sponsor
University of Redlands
Responsible party
Lisa Olson (Professor of Biology, University of Redlands) — Principal investigator
First posted
Sep 25, 2023
Start date
Feb 9, 2022
Primary completion
Mar 8, 2023
Completion
Apr 20, 2023
Last update
Sep 28, 2023

Study contacts

Lisa Olson, Ph.D.
principal investigator · University of Redlands

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Sep 2023. You cannot join it, but the record below documents what was studied.

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