Friday, March 23, 2018

Going Nuts for Calories!

"We all love nuts, but we’re careful not to eat too many because of the high fat calories. Now, there may be less to worry about. In a series of studies, USDA’s Agricultural Research Service (ARS) physiologists David Baer and Janet Novotny looked at how many calories of almonds, walnuts, and pistachios are used by the human body. There are a lot of factors to consider, such as whether the nuts are raw, roasted, or ground, and how well they’re chewed.

Over the years, nutrition science has become more sophisticated, and research by ARS scientists is showing that counting calories isn’t always as simple as it may seem.
The concept behind this is “bioavailability.” For example, while an ounce of almonds has approximately 160 calories, not all of those calories may be used by the human body. This is the idea of “bioavailability.” When food is eaten, it is broken down into its nutritional components, and its calories are burned for energy. However, just because nutrients are present doesn’t mean the body will readily use them. The question of whether those nutrients are “bioavailable” is being examined by scientists in the ARS Food Components and Health Laboratory in Beltsville, Maryland. This lab is part of the Beltsville Human Nutrition Research Center..."
Nuts and calories

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