Soup, Nuts and Weight Loss

It is clear that how much food we eat impacts our health and body weight.  Research is also making it clear that certain foods, particularly high-energy, low-nutrient foods, can have a negative effect on our health and cause weight gain.  In contrast, other types of foods can have a beneficial effect on our body weight and overall health.  Two recent studies explored the impact of soup and nuts on body weight changes.

In the first study, researchers investigated the relationship between soup consumption and body weight and other health factors in 103 Japanese men.  The men's intake of soup was measured using a validated food-frequency questionnaire and the link between soup consumption and body weight was analyzed.  The study investigators reported that average soup consumption in this group of Japanese men was 7 times per week and that a higher frequency of soup consumption was linked to a lower body mass index (BMI), smaller waist size, and smaller waist-to-hip ratio.  This study suggests that increased frequency of soup consumption decreases obesity risk factors.

In the second study, researchers analyzed several long-term population-based studies on the impact of nut consumption on body weight changes.  According to the researchers, two large studies reported that adding nuts to one's regular diet reduced long-term weight gain.  A study of over 1,200 people consuming a Mediterranean diet showed that addition of tree nuts to the Mediterranean diet for 1 year had a beneficial effect on waist size.  A third study of nearly 12,000 subjects showed that eating greater amounts of nuts helped reduce yearly weight gain with individuals consuming more than 4 servings of nuts per week gaining an average of 1/2 pound per year compared to about 3/4 pounds per year in those eating fewer than 4 servings of nuts per week.

These are rather interesting studies that might help many of us make healthier food choices.  Nuts are a tasty treat for most people that don't have nut allergies; however, most nuts are rich in protein, fat, and calories.  Their level of fat and calories has made nuts a somewhat cautionary food item for individuals trying to lose weight.  Fortunately, the fat in nuts is mostly of the healthier, unsaturated variety.  According to the study above, nuts might actually have a beneficial effect on weight gain prevention.  However, nuts are one of those snacks that we typically find very easy to over eat, so we should still practice moderation. 

Soups can make a very healthy meal.  If you make your own, make sure to add plenty of vegetables.  This will make the soup a very nutritious meal that will help you get your recommended daily amount of vegetables as well as increase your dietary fiber consumption.  Just remember to go easy on the salt.  This is also true for canned soups, which often contain very high levels of sodium.  Adding soup to your weekly menu plans can be a delicious and satisfying choice, just be sure to choose healthy options.

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The Right Way To Eat Nuts

Nuts are a delicious snack for those of us who are not allergic to them.  They come in a wide variety with different tastes and textures and have a variety of nutritional benefits.  Nuts are one of the best plant sources of protein, are generally rich in fiber, contain a number of antioxidant phytonutrients, and most of the fat in nuts is of the unsaturated kind.  However, nuts are typically pretty high in calories and it is easy to eat way more than we should at a single sitting without ever realizing it.

So what is the best way to eat nuts and still enjoy their nutritional benefits?  According to new research presented at the American Dietetic Association's recent Food & Nutrition Conference & Expo, you should buy them with the shell still on.  According to a recent news story from Food Product Design, researchers presented data at this conference a few days ago showing that eating in-shell pistachios helps us become more aware of our snacking behaviors.

In one study, volunteers chose their own amount of pistachios as they entered a classroom.  The weight of the portion selected, the portion remaining at the end of the class, and their feelings of fullness and satisfaction were assessed.  Student volunteers offered in-shell pistachios consumed 86 fewer calories than students offered shelled pistachios (125 calories vs. 211 calories).  According to the researchers, in-shell pistachios slowed consumption allowing fullness cues to become active resulting in students eating in-shell pistachios to consume 41% fewer calories while feeling just as full and satisfied as students offered shelled pistachios.

In the second study, subjects were offered pistachios under specific dietary habit conditions.  Individuals were given a bowl containing 4 ounces of in-shell pistachios and an empty bowl into which they placed the shells.  Every two hours during an 8-hour period, 2 more ounces of pistachios were added as needed.  Under one condition, the bowl of pistachio shells was not emptied until the end of the day, while in the second instance, the bowl of shells was emptied every two hours.  Emptying the bowl of shells every two hours caused the study volunteers to eat 48 more calories than leaving the bowl of shells in place all day.  Despite eating 23% fewer calories by leaving the empty shells in the bowl, study subjects reported feeling just as full and satisfied.

This is a truly interesting study that shows us how simple conveniences like eating nuts already shelled can increase the number of calories from snacks we consume.  Many nuts are sold in cans without shells and while they make a delicious snack, many of us find it easy to eat way to many once that can is opened.  Buying nuts still in their shells can help us to slow our snacking down and allow us to feel full more quickly, resulting in us snacking less.  If this is true for pistachios, which can be de-shelled by hand, eating nuts with shells that require the use of a nutcracker might slow us down even more!  The next time you decide to choose nuts for your evening snack, consider buying ones with the shells still on and enjoy!

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