Determinants of plasma dihydrophylloquinone in men and women.
Commercial hydrogenation results in the formation of trans fatty acids. An unintended consequence of the hydrogenation process is conversion of phylloquinone (vitamin K1) to dihydrophylloquinone. Plasma dihydrophylloquinone concentrations have yet to be characterized in population-based studies. Dietary determinants of plasma dihydrophylloquinone were estimated using a semi-quantitative food frequency questionnaire in 803 men and 913 women in the Framingham Offspring Study. Geometric mean dihydrophylloquinone intake was 21.3 (95 % CI 20.4, 22.3) microg/d in men and 19.4 (95 % CI 18.5, 20.2) microg/d in women. Detectable (>0.05 nmol/l) plasma dihydrophylloquinone concentrations were measured in 41 % and 30 % of men and women, respectively. The multivariate odds ratio (OR) of detectable plasma dihydrophylloquinone from the lowest to the highest quartile category of dihydrophylloquinone intake were 1 (referent), 1.13 (95 % CI 0.83, 1.53), 1.66 (95 % CI 1.21, 2.26) and 1.84 (95 % CI 1.31, 2.58), P for trend <0.001, adjusted for sex, age, body mass index, triacylglycerols, season and energy intake. Higher trans fatty acid intake was associated with higher multivariate OR for detectable plasma dihydrophylloquinone (OR comparing extreme quartiles 2.41 (95 % CI 1.59, 3.64), P for trend <0.001). There were limitations in the use of plasma dihydrophylloquinone, evident in the high proportion of the population that had non-detectable dihydrophylloquinone concentrations. Despite this caveat, higher plasma dihydrophylloquinone was associated with higher dihydrophylloquinone intake and higher trans fatty acid intake.
Cardiovascular Nutrition Laboratory, Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University, Boston, MA 02111, USA.
Arja T
AT
Erkkilä
Alice H
AH
Lichtenstein
Paul F
PF
Jacques
Frank B
FB
Hu
Peter W F
PW
Wilson
Sarah L
SL
Booth
D000367:Age Factors; D000368:Aged; D004032:Diet; D004034:Diet Surveys; D015914:Estrogen Replacement Therapy; D005260:Female; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009765:Obesity; D012621:Seasons; D012737:Sex Factors; D012907:Smoking; D044242:Trans Fatty Acids / Q000008:administration & dosage* / Q000378:metabolism; D010837:Vitamin K 1 / Q000008:administration & dosage* / Q000031:analogs & derivatives* / Q000097:blood / Q000378:metabolism
D044242:Trans Fatty Acids; C121368:dihydrophylloquinone; D010837:Vitamin K 1