Prenatal Nutrition The Effects Of Caffeine And Green Tea


Prenatal Nutrition The Effects Of Caffeine And Green Tea

Pregnant women would be wise to​ limit the​ amount of​ green tea they drink during pregnancy,​ and should be careful about taking any green tea supplements. Green tea is​ rich in​ antioxidants,​ and has a​ host of​ health benefits relating to​ dental health,​ blood sugar levels,​ cholesterol,​ and weight loss. But researchers have found,​ whilst examining the​ active constituent of​ green tea,​ the​ epigallocatechins,​ or​ EGCG for short,​ that it​ may affect the​ way the​ body uses folate. Folate is​ important for pregnant women as​ it​ prevents neural tube birth defects in​ babies.

The problem of​ green tea during pregnancy is​ that the​ EGCG molecules are structurally similar to​ a​ compound called methotrexate. Methotrexate is​ able to​ kill cancer cells by chemically bonding with an​ enzyme in​ the​ body called enzyme dihydrofolate reductase (DHFR). Healthy people have this enzyme also - it​ is​ part of​ what is​ called the​ folate pathway,​ which is​ the​ pathway,​ or​ steps,​ the​ body takes to​ transform nutrients like folate into something that can be used to​ support its normal functions.

But this chemical similarity means that the​ EGCG in​ green tea also binds with the​ enzyme DHFR,​ and when it​ does this,​ it​ inactivates this enzyme. When this enzyme is​ inactivated,​ the​ ability of​ the​ body to​ use folate is​ going to​ be affected. How much green tea is​ able to​ be consumed,​ or​ precisely how much folate absorption is​ affected,​ is​ unclear. Though the​ research article did say that drinking 2 cups of​ green tea a​ day can stop cancer cells (which is​ what methotrexate is​ targeting) from growing.

The good news on​ caffeine drank during pregnancy,​ from coffee and tea,​ is​ that a​ moderate amount is​ fine. Two studies,​ one by Danish scientists who interviewed more than 88,​000 pregnant women,​ and the​ other by the​ Yale University School of​ Medicine,​ had similar findings on​ caffeine during pregnancy.

The concerns over caffeine were that it​ would lead to​ low birth weight or​ miscarriage. And this is​ still true of​ a​ very high daily intake of​ coffee. the​ Yale team found that drinking about 600mg of​ caffeine a​ day,​ which is​ about 6 cups of​ coffee,​ would reduce birth weight to​ levels that were clinically significant. the​ rate at​ which birth weight was reduced was established at​ being 28 grams per 100 mg,​ or​ 1 cup,​ of​ coffee per day. But they emphasized that this would not be significant for moderate caffeine consumption.

The Danish study found that drinking 8 cups or​ more of​ coffee per day (this would be about 16 cups or​ more of​ tea),​ would increase the​ chances of​ miscarriage,​ or​ stillbirth,​ by 60% compared to​ women who did not drink caffeine. They also found that moderate coffee or​ tea drinking did not pose significant risks. For those drinking half a​ cup to​ 3 cups of​ coffee a​ day,​ the​ risk of​ fetal death was 3% higher compared to​ non-caffeine drinkers. And for those drinking 4 to​ 7 cups of​ coffee a​ day,​ the​ risk increases to​ 33%. One cup of​ coffee equals about 2 cups of​ tea when comparing caffeine levels. the​ recommended amount of​ coffee drunk is​ up to​ 3 cups daily,​ or​ 6 cups of​ tea,​ by the​ UK food agency.

References:
http://www.nutraingredients-usa.com/news/ng.asp?id=58807
http://www.nutraingredients-usa.com/news/ng.asp?id=24747
http://www.foodnavigator.com/news/ng.asp?id=63174






Related Posts:




Powered by Blogger.