喝咖啡可能提高胆固醇
http://www.100md.com
2001年2月16日
NEW YORK (Reuters Health) - There may indeed be a casual relationship between drinking unfiltered coffee and high cholesterol levels, according to results of a new study.
Researchers led by Dr. Michael J. Klag of Johns Hopkins University in Baltimore, Maryland, analyzed 14 previously published studies that examined the relationship between coffee consumption and elevated cholesterol levels.
``Heavy consumption of caffeine or coffee has long been suspected to have a cholesterol-raising effect, but...studies investigating the associations have yielded conflicting results,'' the authors write in the February 15th issue of the American Journal of Epidemiology.
The result of the current review ``demonstrates that, on average, drinking six cups of coffee was significantly associated with an increase in total cholesterol, LDL (''bad'') cholesterol and triglycerides, but not HDL (''good'') cholesterol levels,'' Klag and colleagues report.
However, Americans consuming filtered coffee can raise their coffee cups with peace of mind because the results point to coffee oils as the main cholesterol-raising culprit. These tend to be found in higher concentrations in nonfiltered or boiled coffee, according to the researchers.
Experiments ``using boiled or nonfiltered coffee had a stronger cholesterol-raising effect than did those using filtered coffee,'' the report indicates.
``These results confirm that coffee should be filtered prior to drinking,'' the authors conclude.
SOURCE: American Journal of Epidemiology 2001;153:353-362., http://www.100md.com
Researchers led by Dr. Michael J. Klag of Johns Hopkins University in Baltimore, Maryland, analyzed 14 previously published studies that examined the relationship between coffee consumption and elevated cholesterol levels.
``Heavy consumption of caffeine or coffee has long been suspected to have a cholesterol-raising effect, but...studies investigating the associations have yielded conflicting results,'' the authors write in the February 15th issue of the American Journal of Epidemiology.
The result of the current review ``demonstrates that, on average, drinking six cups of coffee was significantly associated with an increase in total cholesterol, LDL (''bad'') cholesterol and triglycerides, but not HDL (''good'') cholesterol levels,'' Klag and colleagues report.
However, Americans consuming filtered coffee can raise their coffee cups with peace of mind because the results point to coffee oils as the main cholesterol-raising culprit. These tend to be found in higher concentrations in nonfiltered or boiled coffee, according to the researchers.
Experiments ``using boiled or nonfiltered coffee had a stronger cholesterol-raising effect than did those using filtered coffee,'' the report indicates.
``These results confirm that coffee should be filtered prior to drinking,'' the authors conclude.
SOURCE: American Journal of Epidemiology 2001;153:353-362., http://www.100md.com