r/toxicology

I’ve been working in toxicology for a few years, and I still feel like I don’t fully understand how experienced toxicologists interpret study results and make judgments about what findings are actually meaningful or adverse.

I’m thinking about all kinds of studies — repeated-dose toxicity, reproductive/developmental toxicity, developmental neurotoxicity (DNT), carcinogenicity, etc. I can read the study results and understand what the authors are reporting, but I struggle with the next step: how do you interpret the findings toxicologically and determine what they actually mean for hazard assessment/risk assessment?

For example, how do you think through questions like:

• If there are effects in offspring but not in the dams, how do you determine what that means?
• How do you distinguish an adaptive response from an adverse effect?
• How do you weigh changes in clinical chemistry, organ weights, histopathology, behavior, developmental endpoints, etc.?
• How do you determine which findings are biologically meaningful versus incidental or not toxicologically significant?
• How do you integrate findings across different studies and decide which effects should ultimately drive an endpoint?
• How do experienced toxicologists develop the judgment to look at a collection of findings and say, “this is the important effect” or “this probably isn’t adverse”?

For those of you who work in government/regulatory toxicology, chemical risk assessment, or related fields, how did you learn this skill? Were there particular textbooks, guidance documents, review papers, courses, training materials, or other resources that really helped you understand the reasoning process?

I’m less interested in a list of definitions and more interested in resources that explain how to think through the evidence and make these judgments.

I work in an environment that is pretty gatekeep-y about this kind of knowledge, and people aren’t particularly willing to explain how they learned to interpret studies or how they developed their professional judgment. So I’ve ended up feeling pretty lost and like I’m missing some fundamental knowledge that everyone else somehow learned along the way.

I’d really appreciate any recommendations for resources, or even just hearing how other toxicologists learned to develop this skill. I’m sure I’m not the only person who has struggled with this.

Hello all!

I am in a post doc (Evolutionay Ecology) that I feel does not suit me anymore. I have one more year on my contract, and I have been applying to jobs on and off over the last year. I am greatly restricted by location as my spouse just start his professorship. There was no spousal hire successfully negiotated. My originally career goal was being in an PI role in the federal government, but unfortnately where I am moving to only has the EPA.

From what I am seeing the EPA wants ecotoxicologists. I am sure that I can learn these skills, but my resume is not strong enough to get a job that I want. I feel I need to start at the bottom and work up a bit. Any suggestions on what type of ecotoxicology positions I should be looking for? I have been keeping my eyes on post docs in the area, but I haven't seen anything in the area. Do you all think volunteering at a lab would be helpful at this stage in my career?

My concern is that will my PhD will not be helpful and possibly detrimental. However, I have experience with some chemistry - mostly stoichiometry and ICPMS. Do you all have any ideas on how I can use my experience to get a toxicology job? I think I need specific job titles or keywords to start out.

Thank you!