RT Journal
A1 Vesper HW, Pirkle JL
T1 TRans-fatty acid levels in white adults—reply
JF JAMA
JO JAMA
YR 2012
FD June 13
VO 307
IS 22
SP 2370
OP 2371
DO 10.1001/jama.2012.5148
UL http://dx.doi.org/10.1001/jama.2012.5148
AB 
In Reply: More than 20 different TFAs have been reported in human blood,1- 2 and the selected 4 TFAs measured in plasma in our study are considered to be the major TFAs.3 The extent to which certain food sources affected blood levels of these 4 TFAs in our population group is not known. Although we agree that such information would be helpful for reasons such as those presented by Mr Brandt, the study did not intend to address this topic.