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Roman Bystrianyk
medicine forum Guru
Joined: 02 May 2005
Posts: 454
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 Posted: Tue Jul 11, 2006 2:31 am Post subject:
Fish Oil May Help Save Your Sight
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"Fish Oil May Help Save Your Sight", CBS News, July 10, 2006,
Link:
http://www.cbsnews.com/stories/2006/07/10/health/webmd/main1789823.shtml
To help save your vision as you age, you may want to give fish oil the
thumbs up and cigarettes the thumbs down, according to a new study.
Age-related macular degeneration (AMD) - the leading cause of
age-related vision loss - is nearly twice as common in elderly
smokers as nonsmokers. And seniors who eat fish at least twice weekly
are almost half as likely to have AMD than those who eat fish less than
once a week.
So say Johanna Seddon, M.D., and colleagues in July's Archives of
Ophthalmology. Seddon works at the Massachusetts Eye and Ear Infirmary,
which is affiliated with Harvard Medical School in Boston.
Halfway around the world in Australia, other experts found that
age-related macular problems are rarer in people whose diets are rich
in omega-3 fatty acids, which are found in fish, including salmon and
mackerel, as well as flax seeds and walnuts.
U.S. Study
Seddon's team studied data from 681 individual male twins in their
mid-70s who were World War II veterans. The group included 222 men with
intermediate- or late-stage AMD and 459 with early or no AMD.
The men completed questionnaires about their smoking history, alcohol
use, physical activity, diets, and use of multivitamins and
supplements.
"Current smokers had a 1.9-fold increased risk of AMD while past
smokers had about a 1.7-fold increased risk" of AMD, compared with
nonsmokers, the researchers write.
The study also shows that men with the highest fish consumption (at
least two weekly servings) were 45 percent less likely to have AMD than
those with the lowest fish consumption (less than one weekly serving).
Australian Study
The Australian researchers included Brian Chua, BSc, MBBS, MPH, of the
University of Sydney's ophthalmology department.
Chua and colleagues studied nearly 2,900 people aged 49 and older
(average age: 63-65 years). Participants completed dietary
questionnaires; five years later, they got special photographs of their
retinas to screen for AMD.
Participants who reported eating at least one weekly serving of fish
were 40 percent less likely to develop early-stage AMD during the
study, compared with those who reported eating fish less than once a
month or not at all.
People who ate fish frequently were also less likely to have late-stage
AMD, the study shows. But that pattern was only seen in participants
who reported eating fish at least three times weekly.
Fatty Acid Balance
When it comes to reducing AMD risk, striking the right fatty acid
balance might be important, note Seddon and colleagues.
In their study, the reduced AMD risk was mainly seen in people who
consumed high levels of omega-3 fatty acids and low levels of an
omega-6 fatty acid called linoleic acid, which is found in vegetable
oils including corn, safflower, and sunflower.
Seddon and colleagues aren't against omega-6 fatty acids. But they
note that a lot of people consume way too much omega-6 fatty acids,
compared with omega-3 fatty acids.
"The ideal omega-6/omega-3 ratio is 3:1 to 4:1," Seddon's team
writes.
"However, the average American's diet has an omega-6/omega-3 ratio
that ranges from 10:1 to 50:1 ... Our results suggest that when our
diet is rich in these omega-6 fatty acids (as measured here by linoleic
acid), the protective effect of omega-3 fatty acids is dampened."
Chua's Australian study couldn't confirm those results.
Study's Limits
The studies don't prove that not smoking or eating fish prevented
AMD.
Both studies were purely observational; participants weren't asked to
quit smoking or change their diets. The studies also don't specify
what type of fish participants ate, or how the fish was prepared.
Still, the results held after adjusting for other AMD risk factors.
Inflammation might partly explain the results, the researchers note.
They point out that smoking boosts inflammation, while omega-3 fats
reduce inflammation.
Sources: Seddon, J. Archives of Ophthalmology, July 2006; Vol. 124: pp.
995-1001. Chua, B. Archives of Ophthalmology, July 2006; Vol. 124: pp.
981-986. WebMD Medical News: "Good Fat vs. Bad Fat." News release,
JAMA/Archives. |
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Quick
medicine forum Guru
Joined: 19 Jun 2005
Posts: 343
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| Posted: Tue Jul 11, 2006 6:30 am Post subject:
Re: Fish Oil May Help Save Your Sight
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Roman Bystrianyk wrote:
| Quote: | "Fish Oil May Help Save Your Sight", CBS News, July 10,
2006,
Link:
http://www.cbsnews.com/stories/2006/07/10/health/webmd/main1789823.shtml
To help save your vision as you age, you may want to give
fish oil the thumbs up and cigarettes the thumbs down,
according to a new study.
Age-related macular degeneration (AMD) - the leading
cause of age-related vision loss - is nearly twice as
common in elderly
smokers as nonsmokers. And seniors who eat fish at least
twice weekly are almost half as likely to have AMD than
those who eat fish less than once a week.
|
So if I smoke and eat fish will I break even?
-Quick |
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Dr. Leukoma
medicine forum Guru
Joined: 30 Apr 2005
Posts: 1283
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| Posted: Tue Jul 11, 2006 11:48 am Post subject:
Re: Fish Oil May Help Save Your Sight
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Quick wrote:
| Quote: | So if I smoke and eat fish will I break even?
|
Or, what about eating smoked salmon? :)
DrG |
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retinula@hotmail.com
medicine forum beginner
Joined: 14 Nov 2005
Posts: 44
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| Posted: Tue Jul 11, 2006 1:11 pm Post subject:
Re: Fish Oil May Help Save Your Sight
|
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or smoking dried salmon?
Dr. Leukoma wrote:
| Quote: | Quick wrote:
So if I smoke and eat fish will I break even?
Or, what about eating smoked salmon? :)
DrG |
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vernon
medicine forum Guru
Joined: 15 Jan 2006
Posts: 405
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| Posted: Tue Jul 11, 2006 1:55 pm Post subject:
Re: Fish Oil May Help Save Your Sight
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"Dr. Leukoma" <drg@leukoma.com> wrote in message
news:1152618509.090962.146200@75g2000cwc.googlegroups.com...
| Quote: |
Quick wrote:
So if I smoke and eat fish will I break even?
Or, what about eating smoked salmon? :)
DrG
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It would give a good excuse for your breath. |
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Roman Bystrianyk
medicine forum Guru
Joined: 02 May 2005
Posts: 454
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| Posted: Tue Jul 11, 2006 4:20 pm Post subject:
Re: Fish Oil May Help Save Your Sight
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You could try smoking a fish! |
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PeterB
medicine forum Guru
Joined: 28 Apr 2005
Posts: 384
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| Posted: Tue Jul 11, 2006 5:10 pm Post subject:
Re: Fish Oil May Help Save Your Sight
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Quick wrote:
| Quote: | Roman Bystrianyk wrote:
"Fish Oil May Help Save Your Sight", CBS News, July 10,
2006,
Link:
http://www.cbsnews.com/stories/2006/07/10/health/webmd/main1789823.shtml
To help save your vision as you age, you may want to give
fish oil the thumbs up and cigarettes the thumbs down,
according to a new study.
Age-related macular degeneration (AMD) - the leading
cause of age-related vision loss - is nearly twice as
common in elderly
smokers as nonsmokers. And seniors who eat fish at least
twice weekly are almost half as likely to have AMD than
those who eat fish less than once a week.
So if I smoke and eat fish will I break even?
|
Not if the fish smokes too.
> -Quick |
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Dr Judy
medicine forum Guru
Joined: 07 May 2005
Posts: 304
|
| Posted: Tue Jul 11, 2006 7:29 pm Post subject:
Re: Fish Oil May Help Save Your Sight
|
|
|
Roman Bystrianyk wrote:
| Quote: | "Fish Oil May Help Save Your Sight", CBS News, July 10, 2006,
Link:
http://www.cbsnews.com/stories/2006/07/10/health/webmd/main1789823.shtml
To help save your vision as you age, you may want to give fish oil the
thumbs up and cigarettes the thumbs down, according to a new study.
Age-related macular degeneration (AMD) - the leading cause of
age-related vision loss - is nearly twice as common in elderly
smokers as nonsmokers. And seniors who eat fish at least twice weekly
are almost half as likely to have AMD than those who eat fish less than
once a week.
So say Johanna Seddon, M.D., and colleagues in July's Archives of
Ophthalmology. Seddon works at the Massachusetts Eye and Ear Infirmary,
which is affiliated with Harvard Medical School in Boston.
Halfway around the world in Australia, other experts found that
age-related macular problems are rarer in people whose diets are rich
in omega-3 fatty acids, which are found in fish, including salmon and
mackerel, as well as flax seeds and walnuts.
U.S. Study
Seddon's team studied data from 681 individual male twins in their
mid-70s who were World War II veterans. The group included 222 men with
intermediate- or late-stage AMD and 459 with early or no AMD.
The men completed questionnaires about their smoking history, alcohol
use, physical activity, diets, and use of multivitamins and
supplements.
"Current smokers had a 1.9-fold increased risk of AMD while past
smokers had about a 1.7-fold increased risk" of AMD, compared with
nonsmokers, the researchers write.
The study also shows that men with the highest fish consumption (at
least two weekly servings) were 45 percent less likely to have AMD than
those with the lowest fish consumption (less than one weekly serving).
Australian Study
The Australian researchers included Brian Chua, BSc, MBBS, MPH, of the
University of Sydney's ophthalmology department.
Chua and colleagues studied nearly 2,900 people aged 49 and older
(average age: 63-65 years). Participants completed dietary
questionnaires; five years later, they got special photographs of their
retinas to screen for AMD.
Participants who reported eating at least one weekly serving of fish
were 40 percent less likely to develop early-stage AMD during the
study, compared with those who reported eating fish less than once a
month or not at all.
People who ate fish frequently were also less likely to have late-stage
AMD, the study shows. But that pattern was only seen in participants
who reported eating fish at least three times weekly.
Fatty Acid Balance
When it comes to reducing AMD risk, striking the right fatty acid
balance might be important, note Seddon and colleagues.
In their study, the reduced AMD risk was mainly seen in people who
consumed high levels of omega-3 fatty acids and low levels of an
omega-6 fatty acid called linoleic acid, which is found in vegetable
oils including corn, safflower, and sunflower.
Seddon and colleagues aren't against omega-6 fatty acids. But they
note that a lot of people consume way too much omega-6 fatty acids,
compared with omega-3 fatty acids.
"The ideal omega-6/omega-3 ratio is 3:1 to 4:1," Seddon's team
writes.
"However, the average American's diet has an omega-6/omega-3 ratio
that ranges from 10:1 to 50:1 ... Our results suggest that when our
diet is rich in these omega-6 fatty acids (as measured here by linoleic
acid), the protective effect of omega-3 fatty acids is dampened."
Chua's Australian study couldn't confirm those results.
Study's Limits
The studies don't prove that not smoking or eating fish prevented
AMD.
Both studies were purely observational; participants weren't asked to
quit smoking or change their diets. The studies also don't specify
what type of fish participants ate, or how the fish was prepared.
Still, the results held after adjusting for other AMD risk factors.
Inflammation might partly explain the results, the researchers note.
They point out that smoking boosts inflammation, while omega-3 fats
reduce inflammation.
Sources: Seddon, J. Archives of Ophthalmology, July 2006; Vol. 124: pp.
995-1001. Chua, B. Archives of Ophthalmology, July 2006; Vol. 124: pp.
981-986. WebMD Medical News: "Good Fat vs. Bad Fat." News release,
JAMA/Archives.
|
Don't assume supplements will have the same effect. The studies quoted
looked at those whose diets included fish. That likely means that
those individuals were not eating as much fat laden red meat as the
average American. Also, it is quite possible that those who eat a lot
of fish are from ethnic groups that both eat fish and eat a lot of
vegetables.
The largest controlable risk factor for macular degeneration remains
smoking; a lifetime of good diet with lots of fruits and vegetables,
lower amounts of fat, lower amounts of meat is always better than using
supplements.
Dr Judy |
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vernon
medicine forum Guru
Joined: 15 Jan 2006
Posts: 405
|
| Posted: Tue Jul 11, 2006 9:29 pm Post subject:
Re: Fish Oil May Help Save Your Sight
|
|
|
"Dr Judy" <mpace99@rogers.com> wrote in message
news:1152646181.561256.94840@35g2000cwc.googlegroups.com...
| Quote: |
Roman Bystrianyk wrote:
"Fish Oil May Help Save Your Sight", CBS News, July 10, 2006,
Link:
http://www.cbsnews.com/stories/2006/07/10/health/webmd/main1789823.shtml
To help save your vision as you age, you may want to give fish oil the
thumbs up and cigarettes the thumbs down, according to a new study.
Age-related macular degeneration (AMD) - the leading cause of
age-related vision loss - is nearly twice as common in elderly
smokers as nonsmokers. And seniors who eat fish at least twice weekly
are almost half as likely to have AMD than those who eat fish less than
once a week.
So say Johanna Seddon, M.D., and colleagues in July's Archives of
Ophthalmology. Seddon works at the Massachusetts Eye and Ear Infirmary,
which is affiliated with Harvard Medical School in Boston.
Halfway around the world in Australia, other experts found that
age-related macular problems are rarer in people whose diets are rich
in omega-3 fatty acids, which are found in fish, including salmon and
mackerel, as well as flax seeds and walnuts.
U.S. Study
Seddon's team studied data from 681 individual male twins in their
mid-70s who were World War II veterans. The group included 222 men with
intermediate- or late-stage AMD and 459 with early or no AMD.
The men completed questionnaires about their smoking history, alcohol
use, physical activity, diets, and use of multivitamins and
supplements.
"Current smokers had a 1.9-fold increased risk of AMD while past
smokers had about a 1.7-fold increased risk" of AMD, compared with
nonsmokers, the researchers write.
The study also shows that men with the highest fish consumption (at
least two weekly servings) were 45 percent less likely to have AMD than
those with the lowest fish consumption (less than one weekly serving).
Australian Study
The Australian researchers included Brian Chua, BSc, MBBS, MPH, of the
University of Sydney's ophthalmology department.
Chua and colleagues studied nearly 2,900 people aged 49 and older
(average age: 63-65 years). Participants completed dietary
questionnaires; five years later, they got special photographs of their
retinas to screen for AMD.
Participants who reported eating at least one weekly serving of fish
were 40 percent less likely to develop early-stage AMD during the
study, compared with those who reported eating fish less than once a
month or not at all.
People who ate fish frequently were also less likely to have late-stage
AMD, the study shows. But that pattern was only seen in participants
who reported eating fish at least three times weekly.
Fatty Acid Balance
When it comes to reducing AMD risk, striking the right fatty acid
balance might be important, note Seddon and colleagues.
In their study, the reduced AMD risk was mainly seen in people who
consumed high levels of omega-3 fatty acids and low levels of an
omega-6 fatty acid called linoleic acid, which is found in vegetable
oils including corn, safflower, and sunflower.
Seddon and colleagues aren't against omega-6 fatty acids. But they
note that a lot of people consume way too much omega-6 fatty acids,
compared with omega-3 fatty acids.
"The ideal omega-6/omega-3 ratio is 3:1 to 4:1," Seddon's team
writes.
"However, the average American's diet has an omega-6/omega-3 ratio
that ranges from 10:1 to 50:1 ... Our results suggest that when our
diet is rich in these omega-6 fatty acids (as measured here by linoleic
acid), the protective effect of omega-3 fatty acids is dampened."
Chua's Australian study couldn't confirm those results.
Study's Limits
The studies don't prove that not smoking or eating fish prevented
AMD.
Both studies were purely observational; participants weren't asked to
quit smoking or change their diets. The studies also don't specify
what type of fish participants ate, or how the fish was prepared.
Still, the results held after adjusting for other AMD risk factors.
Inflammation might partly explain the results, the researchers note.
They point out that smoking boosts inflammation, while omega-3 fats
reduce inflammation.
Sources: Seddon, J. Archives of Ophthalmology, July 2006; Vol. 124: pp.
995-1001. Chua, B. Archives of Ophthalmology, July 2006; Vol. 124: pp.
981-986. WebMD Medical News: "Good Fat vs. Bad Fat." News release,
JAMA/Archives.
Don't assume supplements will have the same effect. The studies quoted
looked at those whose diets included fish. That likely means that
those individuals were not eating as much fat laden red meat as the
average American.
|
"Fat laden" The cry of the uneducated tripe vendors. |
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