Investigation of the Acute Cognitive, Mood and Autonomic Effects of Hops in Healthy Participants - Full Text View

Purpose

Hops have been used for many years for their supposed sedative and anxiety reducing properties and can be found in many natural remedies for stress, anxiety and sleeping that are already available to buy.

However, human trials investigating the effects of hops have so far been limited to the effects of the combination of hops and valerian in relation to sleep. Such studies have identified that a valerian-hops mixture can result in improved sleep but Valerian alone has no effect.

The current study aims to investigate the effect of hops alone in healthy human participants aged 18-35 years.

Condition	Intervention
Mood Modulation Modulation of Cognition	Dietary Supplement: Hops Extract Other: Placebo (silica)


Study Type:	Interventional
Study Design:	Allocation: Randomized Endpoint Classification: Efficacy Study Intervention Model: Parallel Assignment Masking: Double Blind (Subject, Investigator, Outcomes Assessor) Primary Purpose: Basic Science
Official Title:	Investigation of the Acute Cognitive, Mood and Autonomic Effects of Hops in Healthy Participants

Resource links provided by NLM:

Drug Information available for: Silicon dioxide

U.S. FDA Resources

Further study details as provided by Northumbria University:

Primary Outcome Measures:

Mood [ Time Frame: across 3 hours ] [ Designated as safety issue: No ]
- Mood as assessed by STAI, Bond-Lader mood scales, POMS, DEQ and stress/euphoria/sedation visual analogue scales (VAS).
- The shift in mood (STAI, Bond-Lader, POMS, DEQ, Stress/Euphoria/Sedation VAS) inculcated by completion of cognitive tasks.
- Heart rate and blood pressure.
- The modulation of blood pressure and heart rate inculcated by completion of cognitive tasks.

Secondary Outcome Measures:

Satiety [ Time Frame: across 3 hours ] [ Designated as safety issue: No ]
- Satiety as assessed by VAS (hungry/full/desire to eat/food intake).
- The modulation of satiety (VAS) inculcated by completion of the cognitive tasks.
Bioavailability of Hops [ Time Frame: across 3 hours ] [ Designated as safety issue: No ]
• Plasma hops levels are to be examined to assess bioavailability.
Cognition [ Time Frame: across 3 hours ] [ Designated as safety issue: No ]
- Performance on working memory tasks (2-back and logical reasoning).
- Performance on serial subtraction element of a dual task.
- Performance on word and picture recognition tasks.


Estimated Enrollment:	150
Study Start Date:	June 2011
Study Completion Date:	December 2011
Primary Completion Date:	December 2011 (Final data collection date for primary outcome measure)

Arms	Assigned Interventions
Active Comparator: 102mg extract 1 hops Equivalent to 0.5g dry weight	Dietary Supplement: Hops Extract All 150 participants will complete 1 study visit; receiving either of the 4 hops doses or placebo (silica). Computer generated random numbers will be used to allocate treatments to participant identification numbers. Treatment will be administered in capsule form and in a double blind manner.
Active Comparator: 410mg extract 1 hops Equivalent to 2g dry weight	Dietary Supplement: Hops Extract All 150 participants will complete 1 study visit; receiving either of the 4 hops doses or placebo (silica). Computer generated random numbers will be used to allocate treatments to participant identification numbers. Treatment will be administered in capsule form and in a double blind manner.
Active Comparator: 79mg extract 2 hops Equivalent to 0.5g dry weight	Dietary Supplement: Hops Extract All 150 participants will complete 1 study visit; receiving either of the 4 hops doses or placebo (silica). Computer generated random numbers will be used to allocate treatments to participant identification numbers. Treatment will be administered in capsule form and in a double blind manner.
Active Comparator: 316mg extract 2 hops Equivalent to 2g dry weight	Dietary Supplement: Hops Extract All 150 participants will complete 1 study visit; receiving either of the 4 hops doses or placebo (silica). Computer generated random numbers will be used to allocate treatments to participant identification numbers. Treatment will be administered in capsule form and in a double blind manner.
Placebo Comparator: Placebo	Other: Placebo (silica) All 150 participants will complete 1 study visit; receiving either of the 4 hops doses or placebo (silica). Computer generated random numbers were used to allocate treatments to participant identification numbers. Treatment will be administered in capsule form and in a double blind manner.

Eligibility


Ages Eligible for Study:	18 Years to 35 Years
Genders Eligible for Study:	Both
Accepts Healthy Volunteers:	Yes

Criteria

Inclusion Criteria:

Male/female,
Healthy
Age 18-35 years old
Non smoker
Proficient in English
Not taking any herbal or prescription medications
Not pregnant seeking to become pregnant or breastfeeding

Exclusion Criteria:

Allergy or hypersensitivity to any of the ingredients contained in the investigational product or any other foodstuff.
Vegetarian (as the capsules contain gelatine).
Have a history of neurological, vascular or psychiatric illness (including depressive illness and anxiety).
Have a current/ history of drug or alcohol abuse.
Currently take medication (excluding the contraceptive pill).
High Blood Pressure (>140/90)
BMI outside of the range 18- 34.9

Contacts and Locations

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01376869

Locations


United Kingdom
Northumbria University
Newcastle upon Tyne, United Kingdom, NE1 8ST

Sponsors and Collaborators

Northumbria University

The New Zealand Institute for Plant and Food Research

Investigators


Study Director:	Crystal Haskell	Northumbria University

More Information

No publications provided


Responsible Party:	Crystal Haskell, Research Fellow, Northumbria University
ClinicalTrials.gov Identifier:	NCT01376869 History of Changes
Other Study ID Numbers:	21AO1
Study First Received:	June 16, 2011
Last Updated:	June 22, 2012
Health Authority:	United Kingdom: Research Ethics Committee

Keywords provided by Northumbria University:


Hops Mood Cognitive Function Bioavailability	Satiety Blood Pressure Heart rate

ClinicalTrials.gov processed this record on March 01, 2015