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Broccoli Extract Shows Promise for Type 2 Diabetes

Broccoli Extract Promise for Type 2 Diabetes

Your Mom may have been right about broccoli’s goodness. A small study hints that a material in the crunchy veggy may help some with diabetes get better control of their blood sugar. Researchers found that a concentrated extract of the substance, called sulforaphane, helped obese type 2 diabetes patients rein in their stubbornly high blood sugar levels.

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The caveat, however, is that the study was short-term and small — involving 97 people with diabetes followed for 12 weeks. And the extract was taken in accumulation to the diabetes drug metformin, not instead of it.

Plus, the extract the researchers used was not like the sulforaphane supplements available at your local health food store.

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“The way that you produce and process the extract is important to keep the sulforaphane intact,” said senior researcher Dr. Anders Rosengren, of the University of Gothenburg, in Sweden.

He said his team used a highly concentrated supplement that was tested for cleanliness and side effects.

“At this point,” Rosengren said, “we cannot recommend that anyone take the currently available extracts on the market to treat type 2 diabetes.”

Sulforaphane is a chemical found in cruciferous vegetables such as cauliflower, Brussels sprouts and broccoli. Broccoli sprouts are a particularly rich source.

Lab research has suggested that sulforaphane may help reduce inflammation in the body, and possibly fight cancer and fatty liver disease, according to Rosengren’s team.

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But it has not been studied for type 2 diabetes, which arises when the body can no longer appropriately use insulin — a blood-sugar variable hormone. As a result, blood sugar levels soar.

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Many people with diabetes have a tough time keeping their blood sugar well-controlled, said Dr. Robert Courgi, an endocrinologist at Northwell Health’s Southside Hospital, in Bay Shore, N.Y.

“Novel medications would be beneficial,” said Courgi, who wasn’t involved in the study.

But he cautioned against drawing conclusions from a small, short-term trial. “More research must be done to discover this product,” Courgi said. “There have been several products that have shown early promise and have since fizzled.”

Rosengren’s team decided to test sulforaphane after screening over 3,800 compounds for their potential to counter certain gene-activity patterns that are associated with type 2 diabetes. Sulforaphane emerged as the most promising candidate.

First, the chemical was tested in the lab, where it partly blocked liver cells from producing glucose (a form of sugar). And in diabetic lab rats, it seemed to shift sure gene movement in the liver away from a “diseased state,” the researchers said.

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The next step was to test sulforaphane in humans. So Rosengren’s team recruited 97 people with type 2 diabetes. All were of Scandinavian ethnicity. Almost all of them were on metformin, a first-line treatment for type 2 diabetes. The majority of them were doing well; however, 37 patients still had poorly controlled blood sugar, the study authors noted.

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Half of the group was randomly assigned to take sulforaphane powder once a day for 12 weeks, in addition to their usual prescription. The other half received a placebo (inactive) powder.

The sulforaphane powder was hardly a panacea. In the end, the supplement appeared to be effective only for specific patients — namely, those who were fat and had poorly controlled blood sugar to start.

For this group, average hemoglobin A1C level went from almost 7.4 percent to just over 7 percent. An A1C test gives a snapshot of a person’s blood sugar levels over the past two to three months.

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The American Diabetes Association suggests an A1C goal of 7 percent for most people with diabetes — though some may need a higher or lower goal.

The supplements did not seem to help any other group in the study, however. And the American Diabetes Association notes that many factors, such as the foods a person eats, as well as how much exercise they get, can have an result on A1C levels.

Rosengren said his team is planning further trials. They aim to test sulforaphane in people with pre-diabetes to see if it can lower the odds of progression to full-blown type 2 diabetes.

One dietitian agreed that one supplement isn’t likely to make a huge impact.

“To conclude that broccoli or broccoli sprouts is the answer to diabetes control would be mistaken,” said Sharon Movsas. She coordinates the Diabetes Education Program at Montefiore Health System in New York City. “Glucose regulation is so highly complex,” she noted. “Even metformin, an FDA-approved drug shown to be highly effective in lowering blood sugars, works in a way that is not fully understood.”

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Rosengren and a colleague are named as inventors on patent applications casing the use of sulforaphane for lowering the liver’s production of glucose.

And if broccoli and other veggies obviously provide the chemical, is a supplement even necessary?

According to Rosengren, a person would have to eat more than a plateful of broccoli each day to get the amount of sulforaphane used in this revise.

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