protective effect that tea has on the cardiovascular system is totally wiped
out by adding milk.
Tests on volunteers showed that black tea significantly improves the ability
of the arteries to relax and expand, but adding milk completely blunts the
effect. Supporting tests on rat aortas (aortic rings) and endothelial
(lining) cells showed that tea relaxed the aortic rings by producing nitric
oxide, which promotes dilation of blood vessels. But, again, adding milk
blocked the effect."
I guess I'd better stop adding hot chocolate mix (which contains powdered
milk) to my morning green tea! It sounds like what I do sometimes - adding
cooking cocao and crushed up peppermint candies - might be ok, since I don't
add milk then.
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