One comment that I have with regard to Huberman's comments on meditation and dopamine. First off, I am a huge advocate for using NSDR (yoga nidra) as a method of practice in daily life. However (and please correct me if I'm wrong), my understanding based off of a lot of the research I have done is that meditation does in fact increase baseline levels of dopamine. A couple of examples include the studies done on the yogic monks where the EEG scan went off the charts in the parts of the brain responsible for pleasure. Given, that is causal, but other studies were able to duplicate this... at least from what I understand based off of the available literature I've read. On an anecdotal level, I can say that I have had instances when I have meditated roughly 2-3 hours per day, and I have experienced bliss beyond what words can describe. Not necessarily a biomarker for increased baseline meditation, but it is something worth noting.