Resveratrol has been called the "fountain of youth" for its anti-aging powers--but the benefits of this great antioxidant are more than just skin deep.

And now, researchers say it might even help diabetics keep their blood sugar levels in check.

Researchers in Hungary recruited 19 diabetics and gave them either two 5 mg doses of resveratrol a day through a supplement, or a placebo, for four weeks.

By the end of the study, the patients who took the resveratrol supplements showed a significant decrease in insulin resistance.

And it's not hard to see why: Oxidative stress helps fuel insulin resistance, and resveratrol is a powerful antioxidant.

But that might not be the complete story--because the researchers also found that volunteers who took the supplement had higher levels of activated phosphorylated Akt, a protein that plays a key role in glucose metabolism.

Of course, a study of 19 people is hardly enough to draw any major conclusions from--but other researchers have also found that resveratrol can help diabetics.

One source of resveratrol, polyphenol-rich red wine, may actually be up to four times stronger than the drug Avandia... without all the notorious risks.

That study was done on a cellular level, in a lab dish, but human wine trials are planned next--and I feel bad for anyone who gets the placebo in that one!

While red wine is probably the most famous source of resveratrol, it's not actually the best way to get what you need. A glass of red can contain as little as 1 mg of resveratrol--which means you'd have to drink 10 glasses a day to get the amounts used in the latest study.

Don't drink yourself into oblivion--try a high-quality supplement instead, which can provide up to 100 times the resveratrol of a glass of wine.

In addition to benefits for diabetics, researchers have found that resveratrol can reduce the oxidative stress of aging and lower your risk for heart disease, cancer, age-related macular degeneration, diabetic retinopathy, and more.

But I'm not going to spoil the party--even if you take a supplement, feel free to drink your wine along with it. A moderate booze habit can make you healthier and smarter--and might even help you to live longer, too. p.s. For more on the benefits of wine, read this.