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and type 2 diabetes and Parkinson’s disease up to 30%, according to a meta-analysis of 127 studies including observational and randomized controlled trials.
The one group of people that did not benefit from coffee consumption were pregnant women because it increased the risk of miscarriage.
Many of the polyphenols found in coffee have been found to have anti-inflammatory and antioxidant activities. They have also been shown to activate DNA repair and autophagy, the clearing away of damaged components inside of cells.
Many of the studies included in this meta-analysis were observational studies (which means the data is weaker) with only a few randomized placebo-controlled controlled clinical trials.