I don't know about the leaching but I love my Salad master pots n pans. Cast iron is good for you because it actually releases good things. I'm sure lots of things leach but at what rate. We all take in things we shouldn't and usually don't know about but as long as the levels are low enough it doesn't hurt. Like last year they found out that the majority of rice picks up chemicals from the soil that isn't good for us. Who knows these days. I think the air is our worst enemy today, that and fast food