Soybeans have been touted as a food substance that is very rich in high quality proteins and healthy fats; and as such have been processed into countless types of food and other edible products.
But there is a nag. Soybeans contain substances known as ISOFLAVONES (apologies to biochemists) which are said to closely mimic human oestrogen. It thus understandably interferes with hormonal balance in men and even in women.
So the need exists to find simple means of removing the "oestrogen" at home; so as to get soy products that are largely free from this substance.
My Google search didn't help. I only got "the isoflavones could be removed by washing in alcohol..."
How that would be done was not vouchsafed.
Biochemists and Food Scientists in the house, please help out.

Avoided soya beans in the past because of this but somehow I learnt that fermentation does reduce it to a certain level. Would still like to learn more.

Avoided soya beans in the past because of this but somehow I learnt that fermentation does reduce it to a certain level. Would still like to learn more.

Thanks.
How exactly should it be fermented?