Coffee Is Antioxidant Source?
Last night my friend told me that coffee is an antioxidant source. Coffee is antioxidant? For me coffee is sleeping medicine :D, everytime I drink coffee, I always feel my eyes become lazy to open. Anyway lets check this information....
Coffee appears to reduce the risk of Alzheimer's disease, Parkinson's disease, heart disease, diabetes mellitus type 2, cirrhosis of the liver, and gout. Some health effects are due to the caffeine content of coffee, as the benefits are only observed in those who drink caffeinated coffee, while others appear to be due to other components. For example, the antioxidants in coffee prevent free radicals from causing cell damage.
Coffee's negative health effects are mostly due to its caffeine content. Research suggests that drinking caffeinated coffee can cause a temporary increase in the stiffening of arterial walls.
A study by the University of Scranton has found out that coffee is a high source of antioxidants. As a primary source of antioxidants it even beats fruits and vegetables. It is number one source of antioxidant in American diet. Both caffeinated and decaf versions appear to provide similar antioxidant levels.
Antioxidants in general; are said to give number of potential health benefits like protection against heart disease and cancers.
Vinson's team analyzed the amount of antioxidants in a variety of foods and compared those figures to how much of each food type, on average, people in the U.S. consume.They found that the average person guzzles down more than a thousand milligrams of antioxidants a day from coffee. This rate far surpasses the next runner-up, black tea, which accounts for a few hundred milligrams a day on average.
Although fruits and vegetables are generally promoted as good sources of antioxidants, the new finding is surprising because it represents the first time that coffee has been shown to be the primary source from which most Americans get their antioxidants.
Coffee came out on top, on the combined basis of both antioxidants per serving size and frequency of consumption, Vinson says. Java easily outranked such popular antioxidant sources as tea, milk, chocolate and cranberries, he says. Of all the foods and beverages studied, dates actually have the most antioxidants of all based solely on serving size, according to Vinson. But since dates are not consumed at anywhere near the level of coffee, the blue ribbon goes to our favorite morning pick-me-up as the number one source of antioxidants.
How antioxidant in coffee works? The roasting of coffee beans dramatically increases their total antioxidant activity. A roasting time of 10 minutes (medium-dark roast) was found to produce coffee with optimal oxygen scavenging and chain breaking activities in vitro. A study of robusta and arabica coffees from six different countries showed that robusta samples contained significantly more reducing substances than arabica samples and that protective activity measured ex vivo was significantly greater in roasted samples than in green coffee. Using the ABTS•+ method (the gold standard), it was confirmed that light roast or medium roast coffee has a significantly higher antioxidant activity in vitro than green coffee. This difference was observed despite a 19% and 45% decrease in the chlorogenic acid content of light and medium roast coffee respectively implying that other compounds make significant contributions to the total antioxidant activity of roasted coffee. Melanoidins are brown polymers formed by the Maillard reaction during the roasting of coffee beans and account for up to 25% of the dry matter. It has recently been shown by the ABTS•+ method that coffee melanoidins have significant antioxidant activity in vitro.
So if you want to drink coffee it's ok. But because of caffeine level in it that has some bad effects to body, better you choose decaffeinated coffee that safer for you.
Next...
Coffee appears to reduce the risk of Alzheimer's disease, Parkinson's disease, heart disease, diabetes mellitus type 2, cirrhosis of the liver, and gout. Some health effects are due to the caffeine content of coffee, as the benefits are only observed in those who drink caffeinated coffee, while others appear to be due to other components. For example, the antioxidants in coffee prevent free radicals from causing cell damage.
Coffee's negative health effects are mostly due to its caffeine content. Research suggests that drinking caffeinated coffee can cause a temporary increase in the stiffening of arterial walls.
A study by the University of Scranton has found out that coffee is a high source of antioxidants. As a primary source of antioxidants it even beats fruits and vegetables. It is number one source of antioxidant in American diet. Both caffeinated and decaf versions appear to provide similar antioxidant levels.
Antioxidants in general; are said to give number of potential health benefits like protection against heart disease and cancers.
Vinson's team analyzed the amount of antioxidants in a variety of foods and compared those figures to how much of each food type, on average, people in the U.S. consume.They found that the average person guzzles down more than a thousand milligrams of antioxidants a day from coffee. This rate far surpasses the next runner-up, black tea, which accounts for a few hundred milligrams a day on average.
Although fruits and vegetables are generally promoted as good sources of antioxidants, the new finding is surprising because it represents the first time that coffee has been shown to be the primary source from which most Americans get their antioxidants.
Coffee came out on top, on the combined basis of both antioxidants per serving size and frequency of consumption, Vinson says. Java easily outranked such popular antioxidant sources as tea, milk, chocolate and cranberries, he says. Of all the foods and beverages studied, dates actually have the most antioxidants of all based solely on serving size, according to Vinson. But since dates are not consumed at anywhere near the level of coffee, the blue ribbon goes to our favorite morning pick-me-up as the number one source of antioxidants.
How antioxidant in coffee works? The roasting of coffee beans dramatically increases their total antioxidant activity. A roasting time of 10 minutes (medium-dark roast) was found to produce coffee with optimal oxygen scavenging and chain breaking activities in vitro. A study of robusta and arabica coffees from six different countries showed that robusta samples contained significantly more reducing substances than arabica samples and that protective activity measured ex vivo was significantly greater in roasted samples than in green coffee. Using the ABTS•+ method (the gold standard), it was confirmed that light roast or medium roast coffee has a significantly higher antioxidant activity in vitro than green coffee. This difference was observed despite a 19% and 45% decrease in the chlorogenic acid content of light and medium roast coffee respectively implying that other compounds make significant contributions to the total antioxidant activity of roasted coffee. Melanoidins are brown polymers formed by the Maillard reaction during the roasting of coffee beans and account for up to 25% of the dry matter. It has recently been shown by the ABTS•+ method that coffee melanoidins have significant antioxidant activity in vitro.
So if you want to drink coffee it's ok. But because of caffeine level in it that has some bad effects to body, better you choose decaffeinated coffee that safer for you.
Next...
posted by Rini at
9:24 AM
2 Comments
