Is there a hotter nutrition term than “superfood”? The term typically refers to foods with particular health benefits, but is this merely a marketing term, or is there actually science behind these superfoods?

“There is no legal definition of ‘superfood,’ but the broadest definition is it’s a food that has extraordinary nutritional benefits,” says Dawn Jackson Blatner, R.D.N., C.S.S.D., author of “The Superfood Swap.” She defines superfoods as foods that deliver phytochemicals— compounds in plants that benefit the plant while it’s growing, but have benefits for us when we eat them — vitamins, minerals, healthy fats and other components that help our bodies thrive. “I love the term ‘superfood’ because it implies some foods are better for you than others, which is true. I say, all foods fit, but some fit better than others.”

Looking at the health claims

One purported health benefit attached to many superfoods is that they offer protection against metabolic syndrome — a cluster of conditions, including high blood pressure, high blood sugar and abnormal cholesterol levels — that increases your risk of Type 2 diabetes and cardiovascular disease. However, these claims are frequently not strongly supported by scientific evidence, especially not by controlled human intervention trials.

A 2018 review looked at the research on 17 foods frequently labeled as superfoods: acai berries, blueberries, cranberries, goji berries, strawberries, chili peppers, garlic, ginger, chia seed, flaxseed, hemp seed, quinoa, bee pollen, cocoa, maca, spirulina and wheatgrass. The researchers found only limited evidence in support of a strong role in reducing the risk of metabolic syndrome. For many of the foods, the research is contradictory or weak, while for other foods, there’s not enough research to produce definitive results.

Making smart “super” choices

“Superfood” has become a frequently used marketing term, but Blatner says the term is overused, and points out that it may be found on the packages of highly processed foods that just happen to contain a superfood ingredient. “Since there is no legal definition, it’s definitely a buyer-beware situation.” She said it’s important to read the list of ingredients on the label and not just use marketing jargon on the front of packages to make food decisions, and offers this tip: “Most superfoods don’t come in a package or have a label.”

Some “superfoods,” such as acai and goji berries, have exotic origins, and may not be affordable for everyone. Are people really missing out if they go for more domestic foods?

“The biggest misunderstanding about superfoods is that people think they need to be exotic or expensive,” Blatner says. “The opposite is true. The best super foods are those ordinary foods you eat regularly that have lots of nutrition such as apples, bananas, oranges, berries, broccoli, cabbage, spinach, garlic, onions, tomatoes, sweet potatoes, salmon, tuna, almonds, walnuts, olive oil, avocados, etc.”

Another tip from Blatner: Most plants have superfood qualities. “For optimal health it is important to have a wide variety of fruits and vegetables and not just focus on the produce with the most popularity or media buzz at the moment,” she says.

Benefits of homegrown superfoods

So instead of looking to the rainforests of South America or the mountains of Tibet for the next superfood, why not look to your backyard — or your local farmers market and grocery store. The superfoods you’ll find there aren’t new or the beneficiaries of a major marketing campaign, but they’re no less healthful. Here are a few examples:

The bottom line

It seems to be part of the human condition to look for magic bullets, especially when it comes to health, but while “superfoods” aren’t miracles, including a variety of these nutritional powerhouses in your meals is a delicious way of investing in your health.

(Environmental Nutrition is the award-winning independent newsletter written by nutrition experts dedicated to providing readers up-to-date, accurate information about health and nutrition in clear, concise English. For more information, visit www.environmentalnutrition.com.)