Milk, serum cholesterol, and the Maasai. A hypothesis

Area of Science:

• Nutritional science
• Epidemiology
• Cardiovascular health

Background:

• Maasai people in East Africa show low serum cholesterol and cardiovascular disease (CVD) incidence.
• High reported milk consumption in Maasai diets led to theories of a milk-specific cholesterol-lowering factor.
• Genetic adaptation has also been proposed to explain the Maasai's cardiovascular health profile.

Purpose of the Study:

• To investigate the factors contributing to low serum cholesterol and CVD incidence in the Maasai population.
• To re-evaluate the role of high milk intake versus other dietary factors in Maasai health.
• To challenge the prevailing hypothesis of a milk-derived hypocholesterolaemic factor.

Main Methods:

• Review of existing literature on Maasai diet and health markers.
• Analysis of reported milk consumption patterns and energy intake data.
• Comparative assessment of dietary hypotheses for observed health outcomes.

Main Results:

• Reported milk intakes for the Maasai may be overestimated.
• Low and variable energy intake is a significant factor in Maasai diets.
• Low serum cholesterol and reduced CVD incidence can be explained by overall low energy consumption.

Conclusions:

• The high milk intake hypothesis for Maasai hypocholesterolaemia is questionable.
• Low energy availability appears to be a primary driver of low cholesterol and CVD rates in the Maasai.
• Further research should focus on the interplay of energy balance and diet in indigenous populations.