my bet is that they aren't flushing properly before harvesting. nothing is essentially "wrong" with the bud. you're just smoking nute and fert chemicals and byproducts too, not just bud. and honestly, it doesn't really cause any "known" damage, but WTF does our FDA know? look whats legal and what isn't... i suggest not buying from dispensaries at all and just growing your own. maybe start your own dispensary if you've got the time to do so. just an idea...