DEAR DR. BLONZ: In a recent column, you gave some information on roasted nuts. : Thanks for your note, but I have no confidence in the scientific statements and related opinions of Norman W. Walker. But aside from those medical constraints, peanuts -- when properly grown, harvested and roasted -- are not toxic, nor are roasted nuts in general. Walker’s writings imply that any roasted nuts are dangerous, and I’m afraid that’s not right. We are all entitled to our opinions, but the statements in that paragraph are nutty, to say the least.