title: High content of long-chain n-3 polyunsaturated fatty acids in red blood cells of Kenyan Maasai despite low dietary intake.
abstract: BACKGROUND
  Increasing land restrictions and a reduced livestock-to-human ratio during the 20th century led the Maasai to lead a more sedentary, market-orientated lifestyle. Although plant-derived food nowadays contributes substantially to their diet, dairy products being high in saturated fatty acids (SFA) and low in polyunsaturated fatty acids (PUFA) still are an important energy source. Since reliable data regarding the Maasai diet date back to the 1980s, the study objective was to document current diet practices in a Kenyan Maasai community and to investigate the fatty acid distribution in diet and red blood cells.
  
  
  METHODS
  A cross-sectional study was conducted among 26 Maasai (20 women, 6 men) from Loodokilani, Kajiado District, Kenya. Food intake was described by the subjects via 24-h recall, and both food and blood samples were analysed.
  
  
  RESULTS
  Two main foods--milk and ugali--constituted the Maasai diet in this region. A total of 0.9 L of milk and 0.6 kg of ugali were consumed per person and day to yield an energy intake of 7.6 MJ/d per person. A major proportion of ingested food contributing 58.3% to the total dietary energy (en%) was plant-derived, followed by dairy products representing 41.1 en%. Fat consumed (30.5 en%) was high in SFA (63.8%) and low in PUFA (9.2%). Long-chain n-3 PUFA (EPA, DPA and DHA) made up only 0.15% of the ingested fatty acids, but 5.9% of red blood cell fatty acids.
  
  
  CONCLUSIONS
  The study indicates the Maasai diet is rich in SFA and low in PUFA. Nevertheless, red blood cells are composed of comparable proportions of long-chain n-3 PUFA to populations consuming higher amounts of this fatty acid group.
authors.affiliation: Department of Nutritional Physiology, Institute of Nutrition, Friedrich-Schiller-University, Dornburger Str. 24, Jena, Germany.
authors.forename: Nadja
authors.initials: N
authors.lastname: Knoll
authors.forename: Katrin
authors.initials: K
authors.lastname: Kuhnt
authors.forename: Florence M
authors.initials: FM
authors.lastname: Kyallo
authors.forename: Beatrice N
authors.initials: BN
authors.lastname: Kiage-Mokua
authors.forename: Gerhard
authors.initials: G
authors.lastname: Jahreis
mesh_terms: D000328:Adult; D000818:Animals; D003430:Cross-Sectional Studies; D003611:Dairy Products / Q000032:analysis; D003906:Developing Countries; D004032:Diet / Q000208:ethnology; D004041:Dietary Fats / Q000008:administration & dosage / Q000032:analysis; D004912:Erythrocytes / Q000378:metabolism*; D015525:Fatty Acids, Omega-3 / Q000008:administration & dosage* / Q000032:analysis / Q000097:blood*; D005260:Female; D006801:Humans; D007630:Kenya; D008297:Male; D008875:Middle Aged; D000073878:Palm Oil; D010938:Plant Oils / Q000008:administration & dosage / Q000737:chemistry; D012423:Rural Health; D012639:Seeds / Q000737:chemistry; D011795:Surveys and Questionnaires; D055815:Young Adult; D003313:Zea mays / Q000737:chemistry
chemical_list: D004041:Dietary Fats; D015525:Fatty Acids, Omega-3; D010938:Plant Oils; D000073878:Palm Oil