Resveratrol (3,5,4'-trihydroxy-trans-stilbene) is a stilbenoid, a type of natural phenol, and a phytoalexin produced naturally by several plants when under attack by pathogens such as bacteria or fungi.

The effects of resveratrol are currently a topic of numerous animal and human studies. Its effects on the lifespan of many model organisms remain controversial, with uncertain effects in fruit flies, nematode worms, and short-lived fish. In mouse and rat experiments, anticancer, anti-inflammatory, blood sugar-lowering and other beneficial cardiovascular effects of resveratrol have been reported. In humans, however, while reported effects are generally positive, resveratrol may have lesser benefits. In one positive human trial, extremely high doses (3–5 g) of resveratrol, in a proprietary formulation designed to enhance its bioavailability, significantly lowered blood sugar. This 28-day Phase 1b study was conducted privately in India by pharmaceutical company Sirtris, and was announced at an investors conference in 2008. However, although it has been alluded to in review articles, the study itself has never been published in a peer-reviewed scientific publication. Despite the mainstream press alleging resveratrol's anti-aging effects, there are no accepted data to form a scientific basis for the application of these claims to mammals (see life extension section below). At the present time, research on resveratrol is in its infancy and the long-term effects of supplementation in humans are not known.

Barbara Jill Walters (born September 25, 1929) is an American broadcast journalist, author, and television personality. She has hosted morning television shows (Today and The View), the television news magazine (20/20), former co-anchor of the ABC World News, and current contributor to ABC News.

Walters was first known as a popular TV morning news anchor for over 10 years on NBC's Today, where she worked with Hugh Downs and later hosts Frank McGee and Jim Hartz. Walters later spent 25 years as co-host of ABC's news magazine 20/20. She was the first female co-anchor of network evening news, working with Harry Reasoner on the ABC Evening News, and continuing as a contributor to the network news division and its flagship program, ABC World News.

In 1996, Walters was ranked #34 on TV Guide's 50 Greatest TV Stars of All Time.

Walters was born in 1929 in Boston, the daughter of Dena (née Seletsky) and Louis "Lou" Walters (born Louis Warmwater). Her parents were both Jewish and descendants of refugees from the former Russian Empire, now Eastern Europe. Walters' paternal grandfather, Abraham Isaac, was from what is now Łódź, Poland, and first immigrated to England, changing his name first to Warmwater and later to Abraham Walters (the original family surname was Waremwasser). Walters' father was born there c. 1894, and moved to the United States with his family in 1900. In 1937, her father opened the New York version of the Latin Quarter; he also worked as a Broadway producer (he produced the Ziegfeld Follies of 1943). He also was the Entertainment Director for the Tropicana Resort and Casino in Las Vegas, Nevada, where he imported the "Folies Bergere" stage show from Paris to the resort's main showroom. Walters' brother, Burton, died in 1932 of pneumonia. Walters' elder sister, Jacqueline, was born mentally disabled and died of ovarian cancer in 1985. She has another half sister, Walda Walters Anderson, born to a different mother.^{[citation needed]}