El Ka Bong said:MHRB extract in lemon Juice is still likely to make you puke even if de-tannined, but a rue-seed extract probably does not need to be treated for tannin removal. If you just don't eat the seed parts, you'll not get any nausea. Grind them to dust, extract in acid (lemon), and filter well. Traveller - you should add some vinegar to those eggs !
Oh dear, forgot the vinegar part indeed, scjuuze me.
b.t.w. you can still get naussious and vomit like hell if you don't eat the seed parts but just drink the rue-tea with no tannins removed. Been there, done that... it's more about the amount of extract you drink. With a extract of 1g of rue you probably won't vomit but you might with 5g.