Cannabinoid Encyclopedia

Health and effects

Cannabinoids and Daytime fatigue

What studies can tell us about cannabinoids and Daytime fatigue, including human research, early evidence, and important limits.

Updated July 2026 2 research sources Human research included

The short answer

What does the research say about Daytime fatigue?

Researchers have studied cannabinoids in connection with Daytime fatigue. The current literature covers CBD and CBN. This page brings together 2 human-study sources. It includes 2 specific study findings from 2 sources. Human research is included, although its design and scope vary. There is no single answer that applies to every cannabinoid, dose, product, or person. 1

Choose your next step

Want the quick path or the full picture?

Use this guide the way you need to. Start with the practical question, then open the study detail only when it helps answer something about Daytime fatigue.

What researchers studiedSee the main areas and the evidence behind each one. Safety and limitsKeep product, dose, medications, and context in view. Open the sourcesGo directly to the studies and references used here.

Key takeaways

What to know first

  1. 1

    Research on Daytime fatigue covers CBD and CBN; those areas should not be combined into one claim. 1

  2. 2

    Human research is included, although its design and scope vary. 2

  3. 3

    Dose, formulation, route, study population, and outcome can change how closely a study applies to a real-world question. 1

Research areas

What researchers studied about Daytime fatigue

These are the main questions represented in the current literature. Each link opens a source used to build the overview.

Human research included

CBD

Researchers have studied CBD in connection with Daytime fatigue. The exact compound, dose, formulation, sleep or health measure, and study design determine what the source can show. 2

Human research included

CBN

Researchers have studied CBN in connection with Daytime fatigue. The exact compound, dose, formulation, sleep or health measure, and study design determine what the source can show. 1

Results extracted so far

What did the studies report?

These summaries appear only when the recorded study outcome is specific enough to reproduce from the linked source. If a source has no result summary here, the result has not been extracted yet; that does not mean the study found no effect.

clinical study in people

A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality

1 recorded finding

PubMed 37796540

  • In a double-blind randomized placebo-controlled study involving adults 18-55 with poor self-rated sleep quality, researchers did not detect a difference in daytime fatigue following 20 mg CBN over 7 nights. The recorded comparator was placebo. 1

clinical study in people

Same-Day Sedative and Night-Time Sleep Effects Following Combined Cannabinoid Formulations: A Randomised-Controlled Trial.

1 recorded finding

PubMed 40542913

  • In a double-blind randomized placebo-controlled crossover trial involving 20 healthy adult novice cannabis users, researchers did not detect a difference in later nighttime sleep after daytime low-dose thc-cbd oil following 1 mL once; cannabinoid milligrams not stated in the abstract by the oral route over single daytime dose with 7-day washout monitoring. The recorded comparator was placebo oil. 2

    Recorded result: No treatment or time differences were detected for indirect nighttime sleep measures (all P>0.05).

How strong is the research?

Not every study answers the same question

This page separates research in people, research reviews, and earlier-stage biology before interpreting the larger question.

2 sources

Human studies

Research involving people is closest to everyday health questions. The product, dose, population, and outcome still determine what each study can show.

Not prominent

Reviews and evidence summaries

Reviews can compare several studies at once. Their conclusion is only as strong and as relevant as the studies they include.

Not prominent

Lab, animal, and mechanism research

Early-stage research can explain biological interest. It cannot, by itself, show that the same effect happens in people.

What these studies actually looked at

The research on Daytime fatigue is not one kind of study. This source set includes 2 clinical studies in people. 1

The recorded populations or models include 20 healthy adult novice cannabis users (1 source) and adults 18-55 with poor self-rated sleep quality (1 source). A result from one group or model should not be assumed to apply to another. 2

The most common recorded outcome focus is actigraphy and diary total sleep time, sleep-onset latency, and awakenings (1 source), daytime fatigue (1 source), and sleep onset latency, wake after sleep onset, or daytime fatigue (1 source). Closely related outcome names can still describe different measurements. 1

Some source records specify doses including 1 mL once (1 source) and 20 mg CBN (1 source). These are descriptions of what researchers tested, not personal dosing instructions. 2

Examples from the literature

What did the studies actually look at?

Each example names the research question and the study details recorded for that source.

clinical study in people

A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality

On this page, this source examines CBN and sleep onset latency, wake after sleep onset, or daytime fatigue and CBN and daytime fatigue. 1

Study type
clinical study in people
Population or model
adults 18-55 with poor self-rated sleep quality
Outcome focus
sleep onset latency, wake after sleep onset, or daytime fatigue and daytime fatigue
Dose recorded
20 mg CBN
Evidence stage
human research

clinical study in people

Same-Day Sedative and Night-Time Sleep Effects Following Combined Cannabinoid Formulations: A Randomised-Controlled Trial.

On this page, this source examines CBD and later nighttime sleep after daytime low-dose THC-CBD oil. 2

Study type
clinical study in people
Population or model
20 healthy adult novice cannabis users
Outcome focus
actigraphy and diary total sleep time, sleep-onset latency, and awakenings
Dose recorded
1 mL once
Evidence stage
human research

Safety and limits

What should readers keep in mind?

Research on Daytime fatigue should be read beside safety. A compound can be non-intoxicating or naturally occurring and still have pharmacologic effects, side effects, interactions, or product-quality concerns. 2

Research doses are descriptions of what a study tested. They are not personal dosing instructions. Questions involving medications, pregnancy, children, driving, liver health, heart health, or serious symptoms deserve professional medical guidance.

Drug interactions Pregnancy and children Driving and impairment All safety topics

Common questions

Questions people ask

Can cannabinoids help with Daytime fatigue?

Research exists, but there is not one answer for every cannabinoid or product. Human research is included, although its design and scope vary. 1

Why can studies reach different answers?

Studies may test different cannabinoids, doses, formulations, routes, people, and outcomes. Those differences can change the result. 2

What should I check in a study?

Check whether it studied people, what product and dose it used, what it measured, how long it lasted, and whether safety was reported. 1

Sources

Read the research

The numbered sources below support the main overview. Links open the PubMed record or DOI in a new tab.

  1. 1
    A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality clinical study in people; human research PubMed 37796540 DOI 10.1037/pha0000682
  2. 2
    Same-Day Sedative and Night-Time Sleep Effects Following Combined Cannabinoid Formulations: A Randomised-Controlled Trial. clinical study in people; human research PubMed 40542913 DOI 10.1007/s40261-025-01455-6
See all 2 research sources

This complete source list is the deeper research layer for the page. Study type and evidence context are shown when they are available in the current record.

  1. A double-blind, randomized, placebo-controlled study of the safety and effects of CBN with and without CBD on sleep quality clinical study in people; human research / 2 linked research notes PubMed 37796540
  2. Same-Day Sedative and Night-Time Sleep Effects Following Combined Cannabinoid Formulations: A Randomised-Controlled Trial. clinical study in people; human research / 1 linked research note PubMed 40542913