Consuming coffee and tea containing polyphenols is associated with lower levels of oxidative stress and better blood vessel function.
Strongly supported
Multiple high-quality studies back this claim.
Not medical advice. For informational purposes only. Always consult a healthcare professional.
Consuming coffee and tea containing polyphenols is associated with lower levels of oxidative stress and better blood vessel function.
See the technical phrasing
Polyphenols in coffee and tea reduce oxidative stress and improve vascular function.
Plant chemicals in coffee and tea block a harmful enzyme in white blood cells that produces damaging oxidants. This prevents the oxidants from destroying the lining of blood vessels, allowing the vessels to relax and function properly.
What the research says
Supports
2 studies
Study: The Effects of Adlay Tea Intake on Immune Homeostasis and Vascular Endothelial Function in Healthy Adults: A Randomized, Double-Blind, Parallel-Group Comparative Study.
This study found that drinking a special herbal tea full of natural plant chemicals (polyphenols) helped lower harmful stress in the body and made blood vessels work better — just like the claim says about coffee and tea.
Study: IMPACT OF A HIGH-POLYPHENOL ROOIBOS TEA INTERVENTION ON POSTPRANDIAL LIPEMIA AND ENDOTHELIAL FUNCTION IN ADULTS WITH METABOLIC SYNDROME
This study found that drinking a special kind of herbal tea full of natural plant compounds helped improve blood vessel function in people with metabolic issues. It supports the idea that tea-like drinks with these compounds can be good for your blood vessels.
Contradicts
0 studies
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 2 supporting studies