A total of 106 overweight and obese participants age 50 years were randomly assigned to a low carbohydrates diet and a high carbohydrates diet. Changes in body weight, psychological mood and well-being and cognitive functioning were assessed.
Participants who were assigned to low carbohydrate diet received 61 percent of consumed calories from fat, 35 percent of consumed calories from protein and 4 percent of consumed calories from carbohydrates. Those who were assigned to high carbohydrate diet got 46 per cent of their calories from carbohydrates, 24 per cent of their calories from protein and 30 per cent of their calories from fat.
The moods of both groups improved during the first eight weeks However, for the rest of the year those in the high carbohydrate group reported decreased feelings of tension, hostility, depression and anxiety.
The researchers concluded that there was a favorable effect to High Carbohydrates diet over the course of 1 year compared to low carbohydrates diet on the mood state of overweight and obese participants. Both diets had similar effects on working memory and speed of processing but in the end those who are in the high calorie diet are more happier.
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