Resveratrol
Resveratrol is a phytochemical found in a variety of plants, fruits and associated fruit products, including grapes, mulberries and blueberries. It has been linked to anti-aging, antioxidant and cardio protective benefits. Some scientists have hypothesized that it may be partially responsible for the "French Paradox," the seemingly low rate of cardiovascular disease among the French. A study conducted in 2008 found that resveratrol consumption similar to the amounts found in a pattern of normal wine consumption may have a positive outcome on ischemic cardiovascular disease. For 15 days, 20 healthy volunteers consumed 300mg of either red or white wine. There was evidence of inhibition of Reactive Oxygen Species (ROS) production and platelet formation, leading researchers to conclude that resveratrol may contribute the positive effects observed with wine consumption. Further research on the potential benefits and risks of resveratrol is warranted.
For more information:
http://www.ncbi.nlm.nih.gov/pubmed
Blueberries
Blueberries and their juice are commonly associated with antioxidant power. These tiny fruits grow primarily in North America and are a rich source of polyphenols, such as anthocyanins. In a recent study, the phytochemicals found in blueberries were associated with improving insulin resistance in obese participants. The double-blind, randomized, placebo-controlled study required twice daily consumption of blueberry bioactives for a period of six weeks. At the end of the study period, participants who received the blueberry compounds showed a significant increase in insulin sensitivity over those given the placebo. Significant steps were taken to address potential confounding factors, such as counseling and monitoring participants to ensure there were no changes in weight or physical activity. Researchers concluded that further research to explore the cellular mechanisms and the potential for long-term benefits is needed.
For more information:
http://jn.nutrition.org/cgi/content/abstract/140/10/1764