bsheets
Wed, Jul-04-07, 09:30
I would have thought this would be posted here already but did a thorough search and it didn't turn up anything ...
Researchers Find Milk Blocks Antioxidants In Tea
Dr. Dave Hnida
Jan 10, 2007
CBS
(CBS4) DENVER Drinking tea improves heart health but something as tiny as a splash of milk can cancel the benefits.
Doctors have known for a long time that tea, whether it be green, black, orange or pekoe, contains substances that protect the heart.
"I grew up adding milk to my tea," said CBS4's Dr. Dave Hnida. "My mom and grandmother did it so I did it. They are English and that's what this study is all about."
Researchers were trying to figure out why England has more heart disease than Germany, France, or Asia where nearly everyone drinks tea without milk.
In England, they typically add milk.
Researchers tested the blood vessels of people who drank tea with milk and without milk and there was a huge difference in how the blood vessels of the body reacted.
Tea contains antioxidants called catechins and polyphenols which cause the blood vessels of the body to relax. However, researchers found that a milk protein, called casein, blocks the effects of the antioxidants.
So they experimented on humans who drank tea with and without milk. The milk drinkers did in fact have blood vessels that stayed stiff and rigid. They measured it with ultrasounds.
The study only included 16 people but it was 16 out of 16 that lost the protection.
"That makes you wonder if milk also may block other heart protective effects and cancer fighting substances normally found in tea," said CBS4's Dr. Dave Hnida.
Coffee also has catechins and polyphenols that are found in tea.
Source: http://cbs4denver.com/local/local_story_010220934.html
Researchers Find Milk Blocks Antioxidants In Tea
Dr. Dave Hnida
Jan 10, 2007
CBS
(CBS4) DENVER Drinking tea improves heart health but something as tiny as a splash of milk can cancel the benefits.
Doctors have known for a long time that tea, whether it be green, black, orange or pekoe, contains substances that protect the heart.
"I grew up adding milk to my tea," said CBS4's Dr. Dave Hnida. "My mom and grandmother did it so I did it. They are English and that's what this study is all about."
Researchers were trying to figure out why England has more heart disease than Germany, France, or Asia where nearly everyone drinks tea without milk.
In England, they typically add milk.
Researchers tested the blood vessels of people who drank tea with milk and without milk and there was a huge difference in how the blood vessels of the body reacted.
Tea contains antioxidants called catechins and polyphenols which cause the blood vessels of the body to relax. However, researchers found that a milk protein, called casein, blocks the effects of the antioxidants.
So they experimented on humans who drank tea with and without milk. The milk drinkers did in fact have blood vessels that stayed stiff and rigid. They measured it with ultrasounds.
The study only included 16 people but it was 16 out of 16 that lost the protection.
"That makes you wonder if milk also may block other heart protective effects and cancer fighting substances normally found in tea," said CBS4's Dr. Dave Hnida.
Coffee also has catechins and polyphenols that are found in tea.
Source: http://cbs4denver.com/local/local_story_010220934.html