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Have you checked your spice rack lately? Spices and herbs can do a lot more than add pizzazz to your cooking -- they can also promote heart health, fight cancer, reduce inflammation, and more. Here are nine super spices and herbs that are good for you and taste good, too.

Cinnamon

Cinnamon is a nutritional powerhouse, with antioxidant properties that keep cells safe from oxidative stress and dangerous free radicals. Antioxidants help fight such diseases as cancer, Alzheimer's, diabetes, and Parkinson's.

What's more, cinnamon is a powerful weapon against cardiovascular problems. Cinnamon helps the hormone insulin work better, which reduces blood sugar levels. That's great news for the one in ten North Americans with type 2 diabetes and the millions more with prediabetes. Keeping blood sugar low can help treat diabetes or even stop it before it starts.

Cinnamon may also help prevent Alzheimer's. A study in 2011 found that an extract from cinnamon bark inhibited the formation of amyloid plaques in mice with Alzheimer's. It even helped restore cognitive levels and correct movement problems in the animals.

How much: Cinnamon's health benefits make it worth adding to your daily diet -- and cinnamon's sweet, warming flavor makes it easy. Aim for a quarter to half a teaspoon most days of the week.

Serving suggestions: Sprinkle a little on fresh fruit, a steaming bowl of oatmeal, or a scoop of peanut butter, or add to fish, chicken, or lamb dishes -- especially with cumin and chili powder -- for a Middle Eastern slant on your normal fare. No time to cook? Sprinkle some cinnamon on your morning coffee or tea for a nice antioxidant boost.

Tip: You know that stuff in your cinnamon jar? It's probably cassia, not cinnamon. True cinnamon, often labeled "Ceylon cinnamon," has higher levels of antioxidants, so seek it out if you can.

Sage

If you associate "sage" with wisdom, you're not far off -- the spice has been shown to help with memory and mood. A study in 2005 gave essential sage oil to healthy young volunteers and found that participants tended to remember things better and feel both more alert and calmer after taking sage.

Sage might also help those with Alzheimer's or other dementias. Like prescribed Alzheimer's drugs, sage inhibits an enzyme called acetylcholinesterase, which in turn may improve cognitive function.

In an open-label study, six weeks of treatment with sage resulted in improved attention and decreased neuropsychiatric symptoms in participants with Alzheimer's. A separate study in 2006 found that rosmarinic acid, an active ingredient in sage, protected mouse cells from the amyloid peptides that are thought to contribute to Alzheimer's.

Sage is also great for digestion, and it has estrogen-like effects, which might help curb hot flashes and other symptoms in women going through menopause.

How much: Beth Reardon, director of nutrition for Duke Integrative Medicine, part of the Duke University Health System, recommends using a quarter to half a teaspoon of sage a few times a week.

Serving suggestions: Sage's earthy flavor epitomizes comfort food, like casseroles and stuffing. Try it sprinkled onto roasted sweet potatoes, snipped into butternut squash soup, or rubbed on a simple roast chicken. You can also make a simple sage tea -- add boiling water to a teaspoon of chopped fresh sage and let steep for 5 to 10 minutes before straining and drinking.

Tip: Want to keep sage fresher longer? Snip off the ends of the long stems and put them in a glass of cool water, just as you would with flowers. Then cover the herbs -- glass and all -- with a clean, dry plastic bag and put them in the fridge. This method should keep herbs fresh for at least a week, and it works with parsley, cilantro, and other long-stemmed herbs as well.

Turmeric

"Turmeric's health benefits are through the roof," says Reardon. "If I could only have one spice for the rest of my life, it'd be turmeric."

Turmeric has been used in Indian Ayurvedic medicine for millennia, and Western science is starting to catch on. Its active ingredient, curcumin, is a strong antioxidant that's been shown in test tube and animal studies to fend off cancer growth, amyloid plaque development, and more.

Turmeric might also boost heart health -- a 2012 study showed that adding turmeric and other high-antioxidant spices to high-fat meals could help regulate triglyceride and insulin levels and protect the cardiovascular system.

Turmeric is also a powerful COX-2 inhibitor -- like a nonsteroidal anti-inflammatory but without the nasty side effects. A human study in 2009 found a daily dose of curcumin just as effective as ibuprofen for osteoarthritis in the knee.

Turmeric may also help regulate the immune system -- a series of studies in 2010 and 2011 showed that curcumin might have positive effects on people with autoimmune disorders, such as multiple sclerosis.

Like all herbs and spices, however, too much turmeric might not be a good thing -- it can inhibit blood clotting in large doses and may exacerbate gallbladder issues, so check with your doctor before using more than a typical culinary amount.

How much: Aim for a teaspoon of turmeric at least three times a week.

Serving suggestions: Turmeric is best known for the bright yellow color -- and flavor -- it adds to Indian dishes. Add a big pinch to a pot of lentil soup, or use with curry powder, raisins, and Greek yogurt to dress a curried chicken salad. Like sage, turmeric works well as tea. You can buy teas commercially from companies like the Republic of Tea or Yogi, or make your own by chopping up an inch of fresh turmeric root and infusing in hot water for 15 minutes.

Tip: The antioxidants in turmeric are a little fragile, so make an effort to find fresh turmeric root. It looks a little like fresh ginger but with a brighter orange interior.

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Thyme

It's hard to imagine continental cuisine without the aromatic addition of thyme. But its antimicrobial properties are what get researchers excited.

If you've used Listerine or a similar mouthwash -- or even some green household cleaners -- chances are it contained thymol, a volatile oil component of thyme. A 2004 study showed that thyme oil was able to decontaminate lettuce with Shigella, a particularly nasty type of food poisoning, and other studies suggest it's also effective against staph and E. coli.

Thyme is also a good digestion aid, helping to reduce gas and other discomfort, says Duke's Beth Reardon, and it's good for the scalp and hair.

How much: Use a teaspoon of fresh thyme or quarter to half a teaspoon of dried thyme about three times a week.

Serving suggestions: Thyme is sort of the savory version of cinnamon -- you can pretty much put it on anything. It's great with chicken, fish, and root vegetables. It also goes well with lemon, including in summery cocktails.

Tip: Fresh thyme should keep about a week in your refrigerator's vegetable drawer, especially if wrapped in a damp paper towel inside an open plastic bag.

Ginger

Ginger has been used in both ancient and modern medicine for its stomach-settling properties. In a series of human and animal studies, ginger has been shown to help quiet nausea, speed food through the digestive tract, and protect against gastric ulcers.

Small studies have also shown that ginger can help with pain, including menstrual cramps, muscle pain, and migraines. Ginger is also a powerful COX inhibitor, Reardon says, so it's a great choice for anyone with osteoarthritis or other chronic inflammatory conditions.

It's best to check with your doctor before ingesting large quantities of ginger, though, since it can cause heartburn and gas, worsening of gallstone issues -- and it may interact with some medications, including warfarin.

How much: If your doctor approves it, it's best to use ginger daily.

Serving suggestions: Ginger's strong, bright taste is an essential component of most Asian and Indian cooking. Try a pinch of ginger in milky black tea, along with cinnamon and cardamom, for a heady chai-like beverage, or dice it and add to a zesty Thai soup. It's also great in baked goods, from gingerbread to gingersnaps. Try adding chunks of candied ginger to pear or apple muffins for an extra zing.

Tip: Like turmeric, it's best if you can use fresh ginger instead of powdered. If the big-name supermarket near you doesn't stock fresh ginger, try an Asian market.

Rosemary

Rosemary has been associated with memory since ancient Greece, when students would wear it in their hair when studying for big exams. Modern science agrees: Carnosic acid, a component of rosemary, is thought to protect the brain from free-radical damage and therefore to lower the risks of stroke and Alzheimer's.

Rosemary is also full of antioxidants; a recent study from the American Association of Cancer Research linked carnosol, another component of rosemary, with inhibiting cancer growth.

Like any herb, feel free to use rosemary in moderation. But check with your doctor before rushing out to buy rosemary supplements. In large quantities, it's been linked to seizures and inefficient iron absorption. And avoid serving a rosemary-heavy dish to a pregnant woman, since it's traditionally been used to induce abortion.

How much: "A little bit of rosemary goes a long way," says Reardon. Aim for a teaspoon of rosemary a few times a week.

Serving suggestions: Rosemary is another spice that easily bridges the sweet-savory gap. Sprinkle some on roasting chicken or vegetables, or add some to summer fruit crisps and crumbles.

Tip: "When herbs and spices are used together, they actually have even more benefits," says Reardon. Try using rosemary in combination with thyme and sage for increased health benefits and added flavor.

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