Good news for grape lovers.

A study last week published by the Journal of Gerontology: Biological Sciences found grapes helped lower blood pressure and improve heart function in lab rats with an otherwise high-sodium diet. (Please note: The study was funded in part by the California Grape Producers.)

Previous studies have suggested that grapes also have anti-cancer and anti-inflammatory benefits.

Take our quiz about grapes and their byproducts:

1. Which contains more calories, 1 cup of Thompson seedless red or green grapes or 1 cup of Thompson seedless canned grapes?

2. Which of the above contains more vitamin C?

3. Which contains more calories and sugar, 1 cup of raisins or 1 cup of Post Grape Nuts cereal?

4. Flavonols are the antioxidant property most associated with grapes’ dietary benefits. Which of the three foods contain the most quercetin, believed to be the most potent flavonol?

a) red grapes

b) bee pollen

c) apples

Answers: 1: canned grapes (110 calories; non-canned, 98); 2: non-canned (29 percent to 4 percent); 3: raisins (493 calories to 413; 97.7 milligrams of sugar per 100 mg to 18.4); 4: b (bee pollen, 31.78 mg quercetin per 100 mg; apples, 7.37; red grapes, 3.98)

Sources: www.nal.usda.gov; www.nutritiondata.com