An excerpt from an article...
Beware of Millet – A Potent Goitrogen
While millet may not contain gluten, it does contain goitrogens. Goitrogens are those substances in food that suppress thyroid activity and can lead to goiter, an enlargement of this very important gland which resides in the throat. Low iodine intake can also lead to goiter.
Hypothyroidism is a serious and sometimes debilitating condition that accompanies a weak or enlarged thyroid such as what occurs with goiter. Depression, difficulty losing weight, loss of hair, cold hands/feet, and fatigue are common hypothyroid symptoms. By some estimates, hypothyroidism is at epidemic proportions in Western society.
While the goitrogens in foods that contain them are usually reduced by cooking (such as cruciferous vegetables), cooking actually increases the goitrogenic effect of millet! Therefore, when folks begin eating large amounts of millet bread with a wholesale switch over from wheat, the goitrogenic effects of this simple dietary change can be profound.
Full text can be found here: Beware of Millet
FYI, all grains must be soaked and/or fermented if one considers eating them in the first place. See Sally Fallon's Nourishing Traditions on that.
Lectins are found in ALL foods, certain foods more than others, and the same food may contain varying amounts of lectins depending on processing, when and where the plant was grown, and species.
The most common potentially 'toxic' lectin containing food groups are
grains, especially wheat and wheat germ but also quinoa, rice, buckwheat, oats, rye, barley, millet and corn.
legumes (all dried beans, including soy and peanuts),
dairy (perhaps more so when cows are feed grains instead of grass, a speculation based on research showing transference of lectins into breast milk and dairy.
nightshade (includes potato, tomato, eggplant and pepper).
full text: http://www.krispin.com/lectin.html