Singer Rosemary Clooney's first big hit was “Come On-A My House,” in 1951. It sold over a million copies.

She also appeared in the movie “White Christmas” (1954) opposite Bing Crosby and Danny Kaye, and had five children with Jose Ferrer.

But these days, she's best remembered as George Clooney's aunt.

Back in the 1950s, Rosemary was a smash hit. We bet today she'd be happy to know that her namesake herb, rosemary, is taking center stage, as recent studies show that it can help people achieve and maintain a healthy gut biome.

One study of the essential oil in rosemary found that it can improve probiotic levels by decreasing E. coli and fungi that cause gas, bloating, irregular bowel movements, and even fatigue. That also helps alleviate heartburn and indigestion caused by overgrowth of bad bacteria in the gut.

Rosemary is also approved for dyspepsia, high blood pressure, alopecia, and rheumatism by the German Commission E, which regulates drugs and medical devices in that country.

But the doses are small: just 1 to 2 grams per day taken with 5 ounces of hot water. The oil is only topical. And overdosing can cause everything from seizures to miscarriage.

A better idea is to skip the supplements and cook with rosemary, which is great on roasted veggies. Or drop fresh sprigs into a bottle of olive oil for use on salads and chicken.

If you grow it in a garden or find it in the wild, try rubbing your hands on the leaves for immediate aromatherapy.