Impressive 6-year-old thread bump!
Because soy lecithin is an excellent commonly-used emulsifier for a powdered product like this, a good source of PA, and allows us to offer this product at a more aggressive price/serving than using sunflower. Also, this is an extremely minute dietary amount - you cannot expect to see any measurable endocrine modulation at this kind of daily dosage, positive or negative.
However, if the soy lecithin worries you, please consider our recently updated Orange Triad pill formula! Extra D3 & K2 has been added to that one.
Lastly, if you have a desire to dig a little deeper, this is a great read on positive and negative correlations concerning heavily soy-based diets/high phytoestrogen intake:
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