Lower dietary vitamin E intake during the second trimester is associated with insulin resistance and hyperglycemia later in pregnancy.
OBJECTIVE
Beneficial effects of vitamin E on insulin sensitivity have been reported in observational and short-term intervention studies in non-pregnant populations. We aimed to investigate whether dietary vitamin E intake during the second trimester would be associated with glucose metabolism later in pregnancy and whether this association would be influenced by an insulin-sensitizing hormone adiponectin.


METHODS
Women with singleton pregnancies (n=205) underwent a 3-h oral glucose tolerance test at 30 weeks gestation and were asked to recall second trimester dietary intake.


RESULTS
Higher dietary vitamin E intake was associated with lower fasting glucose, lower HOMA insulin resistance, and higher Matsuda insulin sensitivity index after covariate adjustment including serum adiponectin among women consuming daily multivitamin supplements (all P≤0.03).


CONCLUSIONS
Lower dietary vitamin E intake during the second trimester is associated with hyperglycemia and insulin resistance later in pregnancy among women consuming daily multivitamin supplementations. Further, these associations are not influenced by adiponectin.
Department of Nutritional Sciences, University of Toronto, Toronto, Ontario, Canada.
S H
SH
Ley
A J
AJ
Hanley
M
M
Sermer
B
B
Zinman
D L
DL
O'Connor
D052242:Adiponectin / Q000097:blood; D001786:Blood Glucose / Q000378:metabolism*; D016640:Diabetes, Gestational / Q000097:blood / Q000209:etiology / Q000517:prevention & control*; D004032:Diet; D019587:Dietary Supplements; D002149:Energy Intake; D005215:Fasting; D005260:Female; D005951:Glucose Tolerance Test; D006801:Humans; D006943:Hyperglycemia / Q000097:blood / Q000209:etiology / Q000517:prevention & control*; D007328:Insulin / Q000378:metabolism; D007333:Insulin Resistance; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D014810:Vitamin E / Q000008:administration & dosage* / Q000494:pharmacology / Q000627:therapeutic use; D014815:Vitamins / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use*
D052242:Adiponectin; D001786:Blood Glucose; D007328:Insulin; D014815:Vitamins; D014810:Vitamin E