What foods should my wife avoid if she wants her estrogen to increase?

Eat more not less. If she is underweight, she can increase the conversion of adrenal hormones into Estrogens by gaining weight. The conversion takes place in fat. Otherwise, not much helps. Some people think that eating soy and soy products helps because soy contains compounds similar to estrogen. If she is having estrogen deficiency, bioidentical hormones can help a lot.