Table 2.

The effect of 2 weeks of soy feeding on the content (mean ± SD) of isoflavonoid phytoestrogens in LDL fractions isolated from six individuals

	Baseline		Soy feeding		Off soy
Day	−1	0	13	14	26
Genistein, pmol/mg of LDL protein*	2.3  ±  2.9	1.6  ±  1.8	172.4  ±  68.1†	175.0  ±  80.1†	2.4  ±  1.1
Daidzein, pmol/mg of LDL protein*	1.1  ±  1.8	3.5  ±  4.0	70.7  ±  63.3‡	72.1  ±  45.2†	2.9  ±  2.9
Cholesterol, mmol/liter	3.4  ±  0.8	3.3  ±  0.7	3.4  ±  0.7	3.4  ±  0.9	3.3  ±  0.9
Triglyceride, mmol/liter	0.4  ±  0.1	0.3  ±  0.1	0.4  ±  0.1	0.4  ±  0.1	0.4  ±  0.1
α-Tocopherol, pmol/nmol of phospholipid§	10.5  ±  2.2	10.3  ±  2.1	10.3  ±  2.1	9.8  ±  2.2	10.4  ±  2.0
Ubiquinol-10, fmol/nmol of phospholipid§	511  ±  146	514  ±  209	470  ±  193	466  ±  184	465  ±  203

^*Fractions not purified by gel filtration on Sephadex G-25. Pooled samples were later gel filtered and reanalyzed showing genistein and daidzein levels not significantly different from baseline. 

^†P < 0.001 vs. baseline (paired t test). 

^‡P < 0.05 vs. baseline (paired t test). 

^§Determination carried out in five of six individuals.