My point is simply nothing is with out issues, most papers have some amount of phenols from the paper production only high end paper is often marked phenol free (linen papers) Phenols are why cedar is bad for you it is high in phenol. (all wood products have it to some degree) Some paper has more of less batch to batch.

Everyone has to use something and it is a case of less bad, not 'safe' I don't believe aspen to be a poor bedding nor do I cyprus, my experience with it was bad and I'll not use any wood chip substrate again. I am not going to say it will kill your snakes sorry lab but it feels melodramatic. I agree Aspen has potential issues but so does everything else.