I imagine their anxiety comes from being at the very bottom of the food chain

Just discovering "anxiety cells" isn't very helpful, since of course we all need those to keep us from putting ourselves at risk. But they were WRONG when they said science doesn't know how to shut them down.
They are clearly ignoring proven natural solutions, that have already been tested and proven.

Studies of CBD oil, sold in most health food stores, show it relieves depression and anxiety.

"A 2015 study concluded that CBD oil is a promising treatment for numerous forms of anxiety, including social anxiety disorder, panic disorder, obsessive-compulsive disorder, generalized anxiety disorder, and post-traumatic stress disorder.

Link: [medicalnewstoday.com]