Anxiety is one of the harder problems. The set of possible fixes basically includes this list https://slatestarcodex.com/2015/07/13/things-that-sometimes-... as well as TRT/SARMs, which are, IMO, underappreciated.

Personally I note that a combination of antiinflammatory supplements (most importantly high-dose omega-3) and magnesium L-threonate tends to help me noticeably, but my anxiety isn't intrinsic, just work-related stress.