Ethnic differences in serum lipids are not explained by genetics, central adiposity, lifestyle, or diet, possibly because dietary carbohydrate has not been considered.
It is known that when calories from carbohydrates replace energy from fat in a person's diet, both LDL and HDL cholesterol levels fall while triacylglycerol levels rise.
Dr. Anwar T. Merchant and co-workers from the Population Health Research Institute in Hamilton, Ontario conducted a population-based cross-sectional study of 619 Canadians of Aboriginal, South Asian, Chinese, and European origin with no previously diagnosed medical conditions. They measured energy-adjusted carbohydrate intake by a validated food-frequency questionnaire.
They found South Asians consumed the most carbohydrate, followed by European, Aboriginal, and Chinese persons.
They also found people consuming the most carbohydrate having an average level of 1.08 mmol/L, compared to 1.21 mmol/L for those who ate the fewest carbohydrates. EachEach additional 100 gram per day of carbohydrates was tied to a 0.15 mmol/L drop in HDL cholesterol. Triacylglycerol levels also rose in tandem with carbohydrate intake.
Fewer intakes of sugar-containing soft drinks, juices, and snacks were associated with higher HDL. Reducing the frequency of intake of sugar-containing soft drinks, juices, and snacks may be beneficial for boosting higher HDL levels.
ALL RIGHTS RESERVED 2007
Reference Carbohydrate intake and HDL in a multiethnic population.Am J Clin Nutr. 2007 Jan;85(1):225-30.