By Serena Gordon
HealthDay Reporter
MONDAY, June 25 (HealthDay News) -- Starting
your morning with a high-protein food and a "dessert" -- such as a
doughnut or a slice of cake -- may help you lose weight and keep it off,
a new study suggests.
However, several nutritionists said they weren't ready yet to embrace the study's conclusions.
When researchers from Tel Aviv University's
Wolfson Medical Center in Israel compared two diet regimens -- one
featuring a low-carbohydrate breakfast, the other a high-protein,
high-carb breakfast -- the sweets-with-breakfast group lost more weight
after eight months.
"Although dietary restriction often results
in initial weight loss, the majority of obese dieters fail to maintain
their reduced weight," wrote the study's authors.
Diet-related weight loss often triggers
hunger and cravings while decreasing suppression of ghrelin, a hormone
that stimulates hunger, the researchers said. This may encourage weight
gain. But, "a high protein and carbohydrate breakfast may overcome these
compensatory changes and prevent obesity relapse," they concluded.
The findings are scheduled for presentation Monday at the Endocrine Society's annual meeting in Houston.
But at least two U.S. nutrition experts
question the wisdom of encouraging regular consumption of sweet,
calorie-dense, low-nutrition foods.
"A combination of protein and carbohydrates
may have kept these study volunteers satisfied, but you have to pay
attention to the quality of foods you're eating, too," said clinical
nutritionist Lauren Graf at Montefiore Medical Center, in New York City.
"You don't want to encourage people to eat a lot of foods with trans
fats, like doughnuts, cookies and cakes." Trans fats, which are
partially hydrogenated oils found in baked goods and other products, can
raise blood cholesterol levels.
Samantha Heller, a registered dietitian and
clinical nutrition coordinator at the Center for Cancer Care at Griffin
Hospital in Derby, Conn., also expressed concerns.
"When you look at what people are eating for
breakfast, it's things like chocolate-covered honey-dipped cereals.
Isn't this the same as dessert?" Heller said. "So many people are eating
dessert for breakfast already, which is helping to contribute to weight
gain, not loss."
Refined carbohydrates and sugary treats cause
a roller-coaster effect on blood sugar, insulin, energy, appetite and
fatigue, Heller added. "Over time, this increases the risk of certain
chronic diseases like type 2 diabetes," she said.
The study included 193 obese men and women
who lived sedentary lifestyles, but didn't have type 2 diabetes. The
average body mass index was 32.2. A measurement of 30 is considered
obese, while below 25 is considered normal weight. The average age was
47.
The study volunteers were randomly assigned
to one of two groups, each allowing men 1,600 calories daily and women
1,400 calories a day. One group got a high-protein, high-carb breakfast,
while the other group was put on a low-carb diet that included a
304-calorie breakfast, with only 10 grams of carbohydrates and 30 grams
of protein. (A small apple contains 14 grams of carbohydrates).
The dessert-with-breakfast group was allowed
600 calories at breakfast -- almost twice as many calories -- including
60 grams of carbohydrates and 45 grams of protein. Types of protein
included tuna, egg whites, cheese and low-fat milk. This group ate fewer
calories at lunch and dinner than the low-carb group.
After four months, volunteers in both groups
lost about 33 pounds each. Over the next four months, however, dieters
eating low-carbohydrate breakfasts regained 22 pounds on average. But,
those who'd had dessert with breakfast continued to lose weight,
averaging another 15-pound weight loss, according to the study.
The researchers speculated that dieters who
had sweets with breakfast had lower levels of ghrelin, the hunger
hormone, so they weren't as hungry and were less likely to crave the
foods they'd eaten earlier in the day.
Heller suspects that eating a healthy form of
protein at each meal and snack likely helped these dieters feel full
and keep their blood sugar levels on an even keel.
Graf said the study shows that a strict
low-carbohydrate diet isn't necessarily the best long-term approach to
weight loss. "If you love sweets, maybe having them once or twice a week
is OK, though I don't recommend processed foods," she added.
Data and conclusions presented at meetings should be considered preliminary until published in a peer-reviewed medical journal.
More information
The U.S. Centers for Disease Control and Prevention has advice on healthy eating for a healthy weight.