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Updated: Jul 14, 2026

Digital Home-Monitoring of Patients after Kidney Transplantation: The MACCS Platform

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Published on: April 12, 2021

Black tea improves endothelial function in renal transplant recipients.

M R Ardalan¹, M K Tarzamni, M M Shoja

¹Department of Nephrology, Tabriz Medical University, Tabriz, Iran. ardalanm@tbzmed.ac.ir

Transplantation Proceedings

|May 26, 2007

Summary

Short-term black tea consumption improved endothelial function in kidney transplant recipients. This suggests black tea may enhance arterial vasodilation, benefiting cardiovascular health in this population.

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Published on: October 20, 2015

Area of Science:

Nephrology
Cardiovascular Research
Endothelial Function

Background:

Endothelial dysfunction is common in renal transplant recipients and linked to cardiovascular disease.
Impaired endothelial function negatively impacts long-term outcomes for kidney transplant patients.

Purpose of the Study:

To investigate the effect of short-term black tea consumption on endothelial function in stable renal transplant recipients.
To assess if black tea improves endothelium-dependent arterial vasodilation.

Main Methods:

A study involving 15 renal transplant recipients with stable graft function.
Brachial artery diameter (BAD) and flow-mediated vasodilation (FMV%) were measured before and after consuming black tea or water.
Measurements were compared to assess the impact of black tea versus a control (water).

Main Results:

Black tea consumption significantly increased posthyperemia BAD, FMV, and FMV% (P<.05).
Water consumption showed no significant effect on these vascular parameters (P>.05).

Conclusions:

Short-term black tea intake appears to improve endothelial function in renal transplant recipients.
Black tea may enhance endothelium-dependent arterial vasodilation, potentially reducing cardiovascular risk.