Antioxidants in coffee, tea may not help prevent dementia, stroke
February 20th, 2013
05:04 PM ET

Antioxidants in coffee, tea may not help prevent dementia, stroke

Drinking coffee and tea rich in antioxidants may not lower your risk of dementia or having a stroke, according to a new study published Wednesday in the online journal Neurology.

The study may call into question other research suggesting a diet high in antioxidants helps reduce the risk of dementia and stroke.

Researchers followed approximately 5,400 people aged 55 years and older for nearly 14 years. The participants had no signs of dementia when they began the study and most had never had a stroke. They were questioned about how often they ate 170 foods over the course of the past year and they were divided into three groups based on the levels of antioxidants in their diet - low, moderate or high.

Antioxidants are vitamins, minerals and other nutrients that help protect your cells and repair cell damage caused by free radicals. Free radicals, molecules responsible for aging and tissue damage, may be a factor in heart disease, cancer and other disease.

Foods loaded with antioxidants include blueberries, strawberries and raspberries, tomatoes, kale, bell peppers, corn, and spinach. The major antioxidant vitamins are Vitamin C, beta-carotene and Vitamin E. They're largely found in colorful fruits and veggies, especially those that are red, blue, purple, yellow and orange in color.

But most of the antioxidants consumed by study participants came in the form of coffee and tea, said study author Elizabeth Devore of Harvard Medical School and Erasmus Medical Center in Rotterdam, Netherlands.

Approximately 600 people developed dementia and about 600 had a stroke over the course of the study. But those who consumed antixoidant-rich diets did not change their risk of developing brain disease any more than those with low levels in their diets, researchers said.

"These results are interesting because other studies have suggested that antioxidants may help protect against stroke and dementia," said Devore. "It's possible that individual antioxidants, or the main foods that contribute those antioxidants - rather than the total antioxidant level in the diet - contribute to the lower risk of dementia and stroke found in earlier studies."

Dr. Richard Lipton, vice chairman of neurology at Albert Einstein College of Medicine says people tend to think antioxidants are called one thing and all have the same properties. But the paper is clear that 90% of the antioxidants came from coffee and tea and that doesn't have the same protective effect.

"This study is not saying that blueberries don't help you or a Mediterranean diet doesn't help you, it's saying this very specific dietary component doesn't reduce stroke and dementia risk." Lipton told CNN. "This study looked at a certain type of antioxidants primarily from coffee and tea and doesn't speak to antioxidants in fruits and vegetables and the Mediterranean diet."

In fact, the researchers say there is growing evidence that consuming lots of fruits, vegetables and even alcoholic beverages may be linked to a reduced risk of stroke - that specific antioxidant-rich foods and beverages are more important for lowering the risk of stoke than the overall antioxidant capacity of the diet.

soundoff (697 Responses)
  1. Mercedes Sprinter Service Near Me


    June 4, 2021 at 05:15 | Report abuse | Reply
  2. ocrv paint and service


    June 4, 2021 at 06:44 | Report abuse | Reply
  3. rent a car near me


    June 4, 2021 at 06:44 | Report abuse | Reply
  4. Mercedes Diesel Repair


    June 4, 2021 at 06:52 | Report abuse | Reply
  5. Diesel Sprinter Repair Service


    June 4, 2021 at 13:06 | Report abuse | Reply
  6. Matt Marcantel

    This was awesome! I would like you to clean up all this spam though


    June 4, 2021 at 13:45 | Report abuse | Reply
  7. red tube photo

    Great article. I'm going through many of these issues as well..


    June 4, 2021 at 18:26 | Report abuse | Reply
  8. part time jobs near me


    June 4, 2021 at 18:30 | Report abuse | Reply
  9. Sprinter Van Repair Shops


    June 4, 2021 at 18:58 | Report abuse | Reply
  10. Mercedes Sprinter Van Repair Near Me


    June 4, 2021 at 19:22 | Report abuse | Reply
  11. best auto body shop in orange county

    Oh my goodness! Amazing article dude! Thanks, However I am encountering issues with your RSS. I donít understand why I cannot join it. Is there anybody getting the same RSS issues? Anybody who knows the solution can you kindly respond? Thanks!!


    June 4, 2021 at 20:56 | Report abuse | Reply
  12. Arturo Dilick

    This was awesome! I would like you to clean up all this spam though


    June 5, 2021 at 05:32 | Report abuse | Reply
  13. Mercedes Benz Sprinter Rv Service Locations


    June 5, 2021 at 09:05 | Report abuse | Reply
  14. rv plumbing


    June 5, 2021 at 09:31 | Report abuse | Reply
  15. qdoba near me

    I'm very happy to find this page. I wanted to thank you for ones time due to this fantastic read!! I definitely appreciated every part of it and I have you saved to fav to look at new stuff in your web site.


    June 5, 2021 at 10:01 | Report abuse | Reply
  16. Internet Marketing Company Near Me


    June 5, 2021 at 10:31 | Report abuse | Reply
  17. Mercedes Benz Sprinter Repair

    Having read this I thought it was really informative. I appreciate you taking the time and effort to put this informative article together. I once again find myself personally spending a significant amount of time both reading and posting comments. But so what, it was still worthwhile!


    June 5, 2021 at 12:09 | Report abuse | Reply
  18. Van Door Repair

    Hi, I do believe your web site may be having browser compatibility issues. Whenever I look at your web site in Safari, it looks fine however when opening in IE, it has some overlapping issues. I just wanted to give you a quick heads up! Other than that, great site!


    June 5, 2021 at 15:05 | Report abuse | Reply
  19. Chevy Van Repair


    June 6, 2021 at 06:20 | Report abuse | Reply
  20. Sprinter Side Door Repair

    Great article! We will be linking to this particularly great article on our site. Keep up the good writing.


    June 6, 2021 at 07:25 | Report abuse | Reply
  21. barbecue near me


    June 6, 2021 at 13:02 | Report abuse | Reply
  22. Repair Sprinter Seat


    June 6, 2021 at 20:40 | Report abuse | Reply
  23. rv inspections near me

    There's definately a great deal to find out about this issue. I really like all the points you've made.


    June 7, 2021 at 17:46 | Report abuse | Reply
  24. rv inspection near me


    June 7, 2021 at 18:38 | Report abuse | Reply
  25. Eusebia Valek

    This was great! I would like you to clean up all this spam though


    June 7, 2021 at 23:02 | Report abuse | Reply
  26. rv mechanic near me


    June 8, 2021 at 01:36 | Report abuse | Reply
  27. oranges for sale near me

    Great info. Lucky me I discovered your blog by accident (stumbleupon). I've book-marked it for later!


    June 8, 2021 at 02:55 | Report abuse | Reply
  28. rv cabinets and furniture


    June 8, 2021 at 03:25 | Report abuse | Reply
  29. travel trailer remodeling companies

    Next time I read a blog, Hopefully it does not disappoint me just as much as this particular one. I mean, I know it was my choice to read, but I actually thought you'd have something helpful to say. All I hear is a bunch of moaning about something that you can fix if you were not too busy looking for attention.


    June 9, 2021 at 00:38 | Report abuse | Reply
  30. RV Paint Shop California


    June 9, 2021 at 02:33 | Report abuse | Reply
  31. Eugenie Heitman

    This was awesome! I would like you to clean up all this spam though


    June 9, 2021 at 02:57 | Report abuse | Reply
  32. rv sales orange county


    June 9, 2021 at 04:42 | Report abuse | Reply
  33. camera repair orange county ca

    Excellent post! We are linking to this particularly great article on our site. Keep up the great writing.


    June 9, 2021 at 05:00 | Report abuse | Reply
  34. Internet Marketing Company Near Me

    You made some good points there. I looked on the net to learn more about the issue and found most individuals will go along with your views on this website.


    June 9, 2021 at 10:50 | Report abuse | Reply
  35. Shirely Dentino


    June 9, 2021 at 14:15 | Report abuse | Reply
  36. Florencia Kinslow

    There is definately a lot to find out about this subject. I love all the points you have made.


    June 9, 2021 at 15:53 | Report abuse | Reply
  37. Leonore Benedetto

    An intriguing discussion is worth comment. There's no doubt that that you ought to write more on this subject matter, it may not be a taboo matter but usually people do not talk about such issues. To the next! Cheers!!

    June 9, 2021 at 16:00 | Report abuse | Reply
  38. Chuck Scheibelhut

    After looking over a few of the articles on your web site, I really appreciate your way of writing a blog. I saved it to my bookmark webpage list and will be checking back in the near future. Take a look at my web site too and tell me your opinion.


    June 9, 2021 at 16:00 | Report abuse | Reply
  39. Video Marketing Service

    Pretty! This was a really wonderful article. Thank you for providing this information.


    June 9, 2021 at 20:13 | Report abuse | Reply
  40. Valene Marquardt

    I blog frequently and I seriously appreciate your content. The article has really peaked my interest. I'm going to bookmark your site and keep checking for new details about once a week. I opted in for your RSS feed too.


    June 9, 2021 at 21:41 | Report abuse | Reply
  41. Chauncey Hinde


    June 10, 2021 at 02:40 | Report abuse | Reply
  42. Lidia Mense

    Itís hard to come by experienced people for this subject, but you sound like you know what youíre talking about! Thanks

    June 10, 2021 at 03:00 | Report abuse | Reply
  43. Misty Gerdes


    June 10, 2021 at 03:00 | Report abuse | Reply
  44. rv repair near me


    June 10, 2021 at 03:54 | Report abuse | Reply
  45. Ty Pawlusiak

    I was able to find good advice from your articles.


    June 10, 2021 at 05:08 | Report abuse | Reply
  46. cheap trade license in uae

    Touche. Outstanding arguments. Keep up the amazing spirit.

    June 10, 2021 at 09:39 | Report abuse | Reply
  47. Golda Priester

    I must thank you for the efforts you have put in writing this blog. I'm hoping to see the same high-grade content from you later on as well. In fact, your creative writing abilities has motivated me to get my very own site now 😉


    June 10, 2021 at 12:31 | Report abuse | Reply
  48. rv repair near me now

    I blog often and I truly appreciate your information. Your article has truly peaked my interest. I'm going to book mark your blog and keep checking for new details about once per week. I opted in for your Feed too.


    June 10, 2021 at 13:15 | Report abuse | Reply
  49. Ronnie Lowell

    I wanted to thank you for this very good read!! I definitely loved every little bit of it. I have got you bookmarked to look at new stuff you postÖ


    June 10, 2021 at 13:20 | Report abuse | Reply
  50. Ignacia Bajek


    June 10, 2021 at 13:55 | Report abuse | Reply
1 2 3 4 5 6 7 8 9 10 11 12 13 14

Leave a Reply to RV Repair Orange County


CNN welcomes a lively and courteous discussion as long as you follow the Rules of Conduct set forth in our Terms of Service. Comments are not pre-screened before they post. You agree that anything you post may be used, along with your name and profile picture, in accordance with our Privacy Policy and the license you have granted pursuant to our Terms of Service.

About this blog

Get a behind-the-scenes look at the latest stories from CNN Chief Medical Correspondent, Dr. Sanjay Gupta, Senior Medical Correspondent Elizabeth Cohen and the CNN Medical Unit producers. They'll share news and views on health and medical trends - info that will help you take better care of yourself and the people you love.