Skip to content

The Effect of Honey-sweetened Coffee, Black Tea and Green Tea on Some Physiological Parameters

The Effect of Honey-sweetened Coffee, Black Tea and Green Tea on Blood Pressure, Heart Rate and Blood Glucose

Status
Completed
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07002307
Enrollment
70
Registered
2025-06-03
Start date
2023-10-17
Completion date
2023-10-19
Last updated
2025-06-15

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Blood Pressure, Heart Rate, Blood Glucose

Keywords

Coffee, Honey-sweetened coffee, Black tea, Honey-sweetened black tea, Green Tea, Honey-sweetened green tea, Blood pressure, Heart rate, Blood glucose

Brief summary

The goal of this clinical trial is to investigate whether a three-day consumption of honey-sweetened black tea, green tea, and coffee will have an effect on blood pressure, heart rate, and blood glucose. The main questions it aims to answer are: Does honey-sweetened black tea, green tea, and coffee, respectively, have the ability to influence blood pressure, heart rate, or blood glucose level? Research will compare honey-sweetened black tea, green tea, and coffee to a placebo (warm water) to see if honey-sweetened black tea, green tea, and coffee work to reduce or increase blood pressure, heart rate, or blood glucose. Participants will: Take honey-sweetened black tea, green tea, and coffee, OR plain black tea, green tea, and coffee, OR warm water, one cup a day for 3 days The beverages will be taken at the Physiology laboratory, University of Uyo, and the participants will be observed for 60 minutes, during which their blood pressure, heart rate, and blood glucose level will be measured. This procedure will be repeated for the 3 days of study.

Interventions

OTHERWarm water at 35 oC

The placebo for the control group

OTHERCoffee

Instant coffee, Nescafé Gold Blend, manufactured by Nestlé Coffee Brand, Nestlé Global

OTHERHoney-sweetened coffee

Instant coffee plus raw dark amber honey produced by Apis mellifera adansonii

OTHERGreen tea

Qualitea Natural Green Tea, packed by Qualitea Ceylon (PVT) LTD

OTHERHoney-sweetened green tea

Green tea plus honey

Lipton Yellow Label Black Tea

OTHERHoney-sweetened black tea

Black tea plus honey

Sponsors

University of Uyo Teaching Hospital
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
18 Years to 26 Years
Healthy volunteers
Yes

Inclusion criteria

Inclusion criteria are as follows: * Age between 18 and 26 * Non-habitual coffee and tea drinkers who consume coffee, green tea, or black tea 2-5 times in the last two months * Non-allergic to coffee, green tea, black tea, or honey * Absence of medication use * Will refrain from ingesting energy drinks, carbonated beverages, caffeinated beverages, or food for 24 hours before the study and throughout the study periods * Will not consume anything except water after 11 p.m. during the experimental days Will be available and cooperate throughout the study duration.

Design outcomes

Primary

MeasureTime frame
Blood pressureWill be measured before consumption of the beverages and at 15, 30, 45, and 60 minutes after consumption of the beverages. This procedure will be repeated for 3 consecutive days.
Heart rateWill be measured before consumption of the beverages and at 15, 30, 45, and 60 minutes after consumption of the beverages. This procedure will be repeated for 3 consecutive days.
Blood glucoseWill be measured before consumption of the beverages and at 30 and 60 minutes after consumption of the beverages. This procedure will be repeated for 3 consecutive days.

Secondary

MeasureTime frame
AgeWill obtained during the eligibility process
HeightWill be measured on the first day of the experiment before the commencement of the experiment.
Body weightMeasurements will be taken over the course of the 3-day study prior to the commencement of the experiment each day.

Countries

Nigeria

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026