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Nutrition

Potatoes may increase risk of type 2 diabetes—depending on their preparation

Three servings weekly of French fries increased the risk of developing T2D by 20%. Baked, boiled, and mashed potatoes were not significantly associated with T2D risk.

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French fries were associated with an increased risk of developing type 2 diabetes (T2D), while other forms of potatoes—including baked, boiled, and mashed—were not, according to a new study led by Harvard T.H. Chan School of Public Health. The study also found that swapping any form of potato for whole grains may lower the risk of T2D.

According to the researchers, while previous studies hinted at a link between potatoes and T2D, the evidence was inconsistent and often lacked detail on cooking methods and the potential effects of substituting other foods for potatoes. “Our study offers deeper, more comprehensive insights by looking at different types of potatoes, tracking diet over decades, and exploring the effects of swapping potatoes for other foods,” said lead author Seyed Mohammad Mousavi, postdoctoral research fellow in the Department of Nutrition. “We’re shifting the conversation from, ‘Are potatoes good or bad?’ to a more nuanced—and useful—question: How are they prepared, and what might we eat instead?”

The researchers examined the diets and diabetes outcomes of 205,107 men and women enrolled in the Nurses’ Health Study, Nurses’ Health Study II, and Health Professionals Follow-up Study. For more than 30 years, participants regularly responded to dietary questionnaires, detailing the frequency with which they consumed certain foods, including French fries; baked, boiled, or mashed potatoes; and whole grains. They also reported on new health diagnoses, including T2D, and various other health, lifestyle, and demographic factors, which the researchers controlled for. Over the course of the study period, 22,299 participants reported that they developed T2D.

The study found that three servings weekly of French fries increased the risk of developing T2D by 20%. Baked, boiled, and mashed potatoes were not significantly associated with T2D risk. The researchers calculated, however, that eating whole grains—such as whole grain pasta, bread, or farro—in place of baked, boiled, or mashed potatoes could reduce the risk of T2D by 4%. Replacing French fries with whole grains could bring T2D risk down by 19%. Even swapping refined grains for French fries was estimated to lower T2D risk.

The researchers complemented their study with a novel meta-analytic approach to estimate how swapping potatoes for whole grains could affect the risk of T2D, using data from previously published cohort studies. This involved two separate meta-analyses: one based on data from 13 cohorts examining potato intake and the other from 11 cohorts on whole grain intake, each encompassing over 500,000 participants and 43,000 T2D diagnoses across four continents. The results were closely consistent with those of the new study.

“The public health message here is simple and powerful: Small changes in our daily diet can have an important impact on risk of type 2 diabetes. Limiting potatoes—especially limiting French fries—and choosing healthy, whole grain sources of carbohydrate could help lower the risk of type 2 diabetes across the population,” said corresponding author Walter Willett, professor of epidemiology and nutrition.

“For policymakers, our findings highlight the need to move beyond broad food categories and pay closer attention to how foods are prepared and what they’re replacing. Not all carbs—or even all potatoes—are created equal, and that distinction is crucial when it comes to shaping effective dietary guidelines.”

“Total and specific potato intake and risk of type 2 diabetes: results from three US cohort studies and a substitution meta-analysis of prospective cohorts,” by Seyed Mohammad Mousavi, Xiao Gu, Fumiaki Imamura, Hala B. AlEssa, Orrin Devinsky, Qi Sun, Frank B. Hu, JoAnn E. Manson, Eric B. Rimm, Nita G. Forouhi, and Walter C. Willett, appeared in The BMJ.

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Nutrition

Fruity fuel for everyday

Help your kiddos stay energized for each school day (including those dreaded homework hours) with nutritious snacks that prioritize hydration.

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School days bring excitement for students with classroom fun, exploration of new subjects, time with friends and extracurricular activities like sports and clubs. They also mean hectic schedules for families, especially parents looking to keep nutrition top of mind in spite of jam-packed weeknight calendars.

Help your kiddos stay energized for each school day (including those dreaded homework hours) with nutritious snacks that prioritize hydration. As a satisfying sweet treat thanks to its taste and nutritional value, watermelon provides a year-round solution to rehydrate as part of simple, kid-friendly meals and snacks.

Sweet watermelon, salty cottage cheese and pops of berries make this Watermelon Berry Fruit Salad with Cottage Cheese hard to top after a long day in the classroom. A sprinkle of fresh mint is a perfect final addition to this after-school treat.

Or for an easy, fast, no-mess meal that can be prepared for homework sessions or taken as a lunchbox treat, look no further than Watermelon Kebabs. Just cube watermelon, turkey breast and cheddar cheese and thread on coffee stirrers or beverage straws then share with your loved ones while tackling dinner and prepping for the next day of learning.

Any way you slice it, watermelon is a nutrient-dense food you can feel confident stocking in your kitchen and feeding to your family. It provides 21 grams (8% of the recommended daily value) of natural carbohydrates and is especially energizing when paired with protein like cottage cheese or turkey for a balanced snack.

Plus, with just 80 calories in two cups, it’s a high-volume food that can fill you up at mealtime. Once you’ve enjoyed the delicious watermelon flesh, make sure to avoid waste by using the rind in recipes like stir fries or salads, or encourage little ones to get creative with watermelon rind crafts to let their creativity shine.

Find more school year snacks and meals by visiting Watermelon.org.

Watermelon Berry Fruit Salad with Cottage Cheese
Recipe courtesy of the National Watermelon Promotion Board

            Watermelon
1          package raspberries
1          package strawberries
1          package blueberries
1          package blackberries
1          container cottage cheese
1          bunch mint leaves
            honey, to taste (optional)

Cut watermelon with star-shaped cookie cutter or into cubes.

In large bowl, mix watermelon with raspberries, strawberries, blueberries and blackberries. Add dollops of cream cheese on top of fruit.

Garnish with mint leaves and drizzle with honey, to taste, if desired, prior to serving.

Watermelon Kebabs
Recipe courtesy of the National Watermelon Promotion Board
Servings: 6

18        seedless watermelon cubes (1/2 inch each)
6          cubes smoked turkey breast
6          cubes cheddar cheese
6          coffee stirrers or beverage straws

Thread cubed watermelon, cubed turkey and cubed cheese on stirrers or straws.

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NewsMakers

Get smart about your heart

From regular checkups and reducing stress to eating well – including heart-healthy snacks like grapes – and exercising regularly, these simple steps can help boost your heart health.

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A crucial component of overall well-being, heart health can be a barometer for living a long, healthy and happy life. Because heart disease is the leading cause of death in the US, according to the Centers for Disease Control and Prevention, taking steps to reduce your controllable risk factors – including poor diet, stress and inactivity – can set you on the right path.

From regular checkups and reducing stress to eating well – including heart-healthy snacks like grapes – and exercising regularly, these simple steps can help boost your heart health.

Know Your Numbers
Knowing key health metrics such as blood pressure, cholesterol levels, blood sugar levels and body mass index can help you and your health care provider identify potential risks early. Schedule annual checkups and discuss any concerns you may have about your heart health. Early detection and risk factor management can reduce the likelihood of developing heart disease.

Eat More Fruits and Vegetables
Incorporating a variety of colorful fruits and vegetables into your diet can ensure you get a broad range of vitamins, minerals, fiber and antioxidants, all of which contribute to a healthy cardiovascular system. For example, leafy greens like spinach and kale are high in potassium, which helps manage blood pressure. Fresh grapes contain 7% of the daily recommended intake of potassium, are a good source of vitamin K and are also a natural source of beneficial antioxidants and other polyphenols, including flavonoids, that can help relax blood vessels and promote healthy circulation. Some studies also suggest grapes have a beneficial impact on blood lipids and more.

In fact, one study found women who consumed 1 1/4 cups of grapes every day benefited from reduced blood triglyceride levels, LDL cholesterol levels, inflammatory proteins and other markers of heart disease.

Bright, juicy and bursting with flavor, Grapes from California can be enjoyed by the handful or blended with rich bananas, tangy Greek yogurt and a hint of almond in The Great Grape-Acai Smoothie Bowl for a delicious blend of fruity flavors at breakfast, lunch or snack time – it not only tastes great, but supports a healthy heart. 

Get Moving
Regular physical activity is one of the most effective ways to improve heart health. Exercise strengthens the heart muscle, improves blood circulation and helps maintain a healthy weight. Aim for at least 150 minutes of moderate-intensity aerobic exercise per week, as recommended by the American Heart Association, such as walking, jogging or swimming with strength training exercises like lifting weights or using resistance bands mixed in to help reduce the risk of heart disease and improve overall cardiovascular health.

Manage Stress
Consider your stress level: chronic stress can negatively impact heart health, increasing blood pressure and other risk factors for heart disease. Techniques such as deep breathing, meditation, yoga and regular physical activity can help manage stress levels and maintain a healthy heart. Additionally, taking time to engage in hobbies, spending time with loved ones and ensuring adequate sleep are stress-reducing activities that improve overall well-being and heart health.

To learn more about the heart-health benefits of grapes, and find additional heart-friendly recipes, visit GrapesFromCalifornia.com.

The Great Grape-Acai Smoothie Bowl
Servings: 1

1/2       cup red Grapes from California, fresh or frozen
1/2       banana
1          frozen acai fruit pack (3 1/2 ounces)
1/2       cup plain, nonfat Greek yogurt
1/4       teaspoon almond extract

Topping:
1/4       cup sliced red Grapes from California
1          tablespoon sliced, toasted almonds
1          tablespoon pepitas
1          teaspoon chia seeds

In small blender, combine grapes, banana, acai, yogurt and almond extract; process until smooth.

Pour into bowl and top with sliced grapes, sliced almonds, pepitas and chia seeds.

Nutritional information per serving: 420 calories; 19 g protein; 63 g carbohydrates; 12 g fat (26% calories from fat); 2.5 g saturated fat (5% calories from saturated fat); 5 mg cholesterol; 45 mg sodium; 8 g fiber.

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Nutrition

Eat your greens and skip the sugar spikes 

Cruciferous vegetables like broccoli and kale could help with the management of blood sugar levels, particularly for people at risk of type 2 diabetes and cardiovascular disease (CVD).  

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New research by Edith Cowan University (ECU) has found evidence that cruciferous vegetables like broccoli and kale could help with the management of blood sugar levels, particularly for people at risk of type 2 diabetes and cardiovascular disease (CVD).  

PhD student Ms Emma Connolly investigated whether cruciferous vegetable intake improved glycaemic control (blood sugar control) compared to root and squash vegetables in non-diabetic adults with elevated blood pressure. 

In a randomised, controlled, crossover trial, participants consumed four serves per day of either cruciferous vegetables (broccoli, cabbage, cauliflower, kale) or root and squash vegetables (carrot, potato, pumpkin, sweet potato) with lunch and dinner meals for two weeks. 

“Our participants wore glucose monitors throughout the study, so that we were able to measure blood sugar levels continuously throughout each two-week period,” Ms Connolly said. 

“We found that, when participants consumed the cruciferous vegetables, they had less variable blood sugar levels compared to when they consumed the root and squash vegetables. We also noted that these participants had a smaller spike in sugar levels after the meals. A central goal of blood sugar control, particularly for people with diabetes, is to smooth out spikes and reduce variability in blood sugar levels throughout the day. Stable blood sugar, with minimal peaks and less fluctuations is associated with better overall health and wellbeing.” 

Ms Connolly said further research is essential to fully understand the underlying mechanisms driving these findings, as well as to explore the broader clinical implications.  

“Continued investigation will be crucial to determine how these vegetables can be effectively incorporated into dietary recommendations for improved blood sugar regulation and overall health management,” she said. 

Poor glycaemic control is estimated to occur in 541 million individuals worldwide. Ms Connolly noted that dysregulated glucose control increases the risk of type 2 diabetes and subsequent CVD and has a substantial societal impact.  

The total cost attributed to type 2 diabetes with CVD is projected to exceed AUD$18.7 billion in Australia alone by 2031.  

“Less than 1 in 15 Australian adults meet vegetable intake recommendations. Even more concerning is that cruciferous vegetables are among the least consumed vegetables. Adding vegetables like broccoli, kale, bok choy, gai lan, and cabbage to your meals most days could make a big difference to your health,” Dr Lauren Blekkenhorst said. 

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