The importance of the time of day and our internal clock for food intake and energy metabolism is a very exciting research field. Future studies should investigate why we spend so much more energy after breakfast than after dinner
WeightControl.com Interview with: M. Sc. Juliane Richter University of Lübeck Center of Brain, Behavior and Metabolism Section of Psychoneurobiology
WeightControl.com: What is the
background for this study? What are the
Response: The background for this study is
that there is still the misbelief that it does not matter when we eat and that
the only thing that counts is the energy balance of the whole day. However,
since our body has an internal clock and many processes in the body, for
example glucose metabolism, are subject to diurnal variations, we investigated
whether diet-induced thermogenesis also varies during the course of the day.
Diet-induced thermogenesis is the energy our body spends for the digestion,
absorption and transport of nutrients. We found that diet-induced thermogenesis
after breakfast is more than twice as high as after dinner. We also
investigated whether this difference in time of day depends on the amount of
calories consumed. In both cases, high- and low-calorie meals, the body spends
more energy after breakfast than after dinner.
WeightControl.com Interview with: Britt Burton–Freeman, Ph.D Director of the Center for Nutrition Research at IFSH Associate Professor, Food Science and Nutrition Illinois Institute of Technology
WeightControl.com: What is the
background for this study? What are the main findings?
Response: Red raspberries contain appreciable amounts of dietary fiber and a
variety of other nutrients, such as vitamin C, vitamin K, magnesium and
potassium. They also contain phytochemicals, such as polyphenols with
documented biological activity suggesting metabolic benefits. However, there is
limited data assessing the potential effects of red raspberries in humans,
particularly in those people who might benefit the most, ie., people at risk
for diabetes mellitus.
We investigated the health benefits of consuming 1-2
cups of red raspberries in a group of people who were overweight/obesity and had
prediabetes and insulin resistance.
The results showed that when a breakfast meal was
consumed with raspberries, less insulin was needed to manage blood sugar
compared with a meal with no raspberries. Moreover, when two cups of red
raspberries were included in the breakfast meal, blood sugar concentrations
were significantly lower compared to consuming breakfast without raspberries.
L. Kuk, PhD
School of Kinesiology and Health Science
Sherman Health Science Research Centre, Rm 2002
What is the background for this study? What are the main findings?
weight loss is prescribed at the rate of 1 to 2 pounds per week. However,
this is largely based on the observation that weight losses faster than 2
pounds per week put patients at an increased risk for gallstones. It is
unclear whether this is the optimal rate of weight loss for CVD or diabetes
outcomes. Furthermore, fast weight loss has historically thought to be
associated with poorer long term weight loss. However, this was largely
based on research using liquid diets. Recent evidence suggests that
faster weight loss may be similar to slower weight loss when more sensible
lifestyle interventions are used. Thus, if there are additional benefits
of faster weight loss for CVD or diabetes outcomes, then there may a rationale
for prescribing faster weight loss as the overall rate of gallstones is fairly
observed that those who lose weight faster than 2lb/wk tend to lose more weight
overall, but for the same overall weight loss, there is no difference in terms
of health benefits with fast or slow weight loss.