Comparison of coffee, tea and green
tea consumption between Japanese with and without metabolic syndrome in a cross-sectional study
Not exact matches
Iwai N, et al. «Relationship
between coffee and green
tea consumption and all - cause mortality in a cohort of a rural Japanese population.»
He adds that although the new research from Japan found no link
between tea consumption and cancer risk, more research is needed to resolve the conflict
between this and previous cancer - related studies.
The authors examined the associations
between 4 - year changes in coffee and
tea consumption and risk of type 2 diabetes in the subsequent 4 years.
Regarding
tea consumption, the authors say: «we found no evidence of an association
between 4 - year increases in
tea consumption and subsequent risk of type 2 diabetes.
Exactly how the extract works is unknown, but some researchers have proposed a link
between green
tea consumption and lower estrogen levels.
One paper reported weak positive associations
between maternal caffeine
consumption and spina bifida (neural tube defects), but without a dose - effect relationship and with a negative association for
tea.
In another study on 4,809 participants aged 65 and older, the relationship
between consumption of
tea and coffee and changes in cognitive function by gender was examined.
We report herein the findings of meta - analyses for the association
between coffee, decaffeinated coffee, and
tea consumption with risk of diabetes.
Some studies have reported a significant reduction in plasma glucose and hemoglobin A1c levels, 52,53 while others have reported no effect on any aspect of glucoregulatory control.54 Given that dietary polyphenols are rapidly metabolized, one explanation for the discrepant findings
between these studies may have been the measurement of the effects of
tea on biomarkers at different times after its
consumption.