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30 August 2018

Could eating crickets boost your health?

New research shows that eating crunchy crickets helps boost your natural gut bacteria and improves your overall health.

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Jiminy Cricket! New research suggests that saving room on your plate for some crunchy, chirpy protein might be good for your health.

Specifically, eating crickets may help improve the natural bacteria in your gut (microbiome) and reduce inflammation in your body.

Novel addition to diet

In a small pilot trial, the study team gave 20 volunteers a bugs-for-breakfast diet for two weeks. But, they gave them a more palatable form of crickets – a powder made from the large insects was turned into muffins or shakes.

"Insects are novel to the American diet, but they should be considered a potentially helpful food that contains important nutrients and fibres that could have benefits to our overall health, including our gut microbiome," said the study's lead author, Valerie Stull. She is a researcher at the Center for Sustainability and the Global Environment at the University of Wisconsin, Madison.

"This is a small study, however, so more research is needed to better understand these effects," she added.

And for those totally grossed out by the thought of eating bugs, what does Stull suggest?

"Even the most open-minded Americans struggle with the idea of eating insects – at least at first. It just isn't part of our food culture," she said. But, if you're willing to try a diet with bugs, Stull said that "edible insects are nutritious and often delicious".

And, she noted, "What's the real difference between a cricket and a lobster? One arthropod is on land, the other in the ocean."

Global diet

Stull said about two billion people worldwide consume bugs as part of their diets. She said that she initially became interested in using insects for food as part of her interest in environmental sustainability.

"There is so much untapped potential when it comes to utilising edible insects. They are abundant, and when farmed, can generate a high-quality protein with a substantially lower environmental impact than traditional livestock. They need less feed, land and water to grow – and they generate fewer greenhouse gases," she explained.

However, she doesn't see insects as a panacea. "I don't believe that edible insects are the silver bullet for solving all of our current agriculture, health, and environmental challenges. But they certainly have potential," she said.

Still, she wondered, what's the impact of eating bugs in the human body? Is it safe? Is it healthy?

That's where the current study comes in.

The 20 volunteers ate either a regular breakfast or one containing muffins or shakes made with cricket powder for two weeks. Then all of the participants ate normally for two weeks. For the two weeks after that, the volunteers switched which breakfast they had – those who initially had a regular breakfast now had two weeks of bugs-for-breakfast, and vice versa.

Nutritious bugs

Crickets and other insects have fibres, such as chitin. These are different from the dietary fibre found in fruits and vegetables. Some types of fibre help the body's beneficial bacteria population grow. These are known as probiotics.

And, the current study showed that eating a diet of crickets in the morning helped one probiotic in particular, Bifidobacterium animalis, to flourish. This probiotic strain has been linked to better gut function, the researchers said.

Using blood and stool samples, they also saw evidence of reduced inflammation in the body. Inflammation has been linked to many disorders, such as depression and cancer, the study team noted.

Registered dietician Samantha Heller reviewed the study's findings. The study was published online recently in Scientific Reports.

"The study was really small and only lasted for two weeks so we don't know if these changes would last even if people kept eating the cricket breakfast," she said.

Regular consumption of bug protein

If you're interested in changing your body's microbiome for the better, Heller said "eating a healthy, plant-based diet, getting regular exercise and managing stress all seem to support a healthy gut".

Stull said that the microbiome's make-up changes rapidly. So, it's clear that to get the benefits from insects in your diet, you would need to regularly consume the crunchy protein.

And, if this study has left you "chirping at the bit" to give insects a try, Stull says that edible insects are commercially available. And, if you're a tad less adventurous, but might be willing to sprinkle some bug powder into your breakfast muffin mix, she says powders made from insects are also commercially available, and can even be found online.

Stull noted one caveat for potential cricket connoisseurs – if you're allergic to shellfish, it's possible you'll be allergic to crickets, too.

Image credit: iStock

 
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