So in KSFL we always say it is best to cut out soy in your diet and here is why:
Soy can affect your ability to tone up as it has a negative impact on the thyroid. Soy contains goitrogens, which are substances that disrupt thyroid function by interfering with iodine uptake in the thyroid gland. If your thyroid isn’t functioning optimally, this can lead to a sluggish metabolism and ultimately increased fat gain.
Soy can also impact your hormone balance. It’s is high in phytoestrogens, which promote the increased growth of estrogen sensitive tissue. This can lead to increased fat stores in the chest, legs, waist and bum.
So avoid soy if you can as it is not worth the effect it will have on your diet!