NCT02298530

Tea Components, Mental Stress and Blood Pressure

A Study to Determine the Acute Effects of a Tea Component on Blood Pressure and Mental Stress Challenge

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 56 (actual)
• Sponsor: Unilever R&D · Industry
• Sex: All
• Age: 18 Years – 45 Years
• Healthy volunteers: Accepted

Summary

Assess the effects of adding theanine to a caffeinated beverage on changes in blood pressure during acute mental stress.

Detailed description

Caffeine and (mental) stress can increase blood pressure. In a typical everyday and/or work environment they commonly coincide. Tea has the reputation of being a relaxing drink. L-theanine is an amino acid found almost exclusively in tea. In a previous study it was shown that caffeine increased blood pressure, while theanine antagonised these effects. In the current study the effect of theanine to a placebo on blood pressure are directly compared.

Conditions

• Healthy

Interventions

Type	Name	Description
OTHER	Combination of caffeine and theanine	Beverage containing caffeine and theanine
OTHER	Caffeine	Beverage containing caffeine

Timeline

• Start date: 2015-03-01
• Primary completion: 2015-10-01
• Completion: 2015-11-01
• First posted: 2014-11-24
• Last updated: 2015-12-04

Locations

1 site across 1 country: United Kingdom