Nootropics
Strongly advised against taking regularly, as they are seen as drugs that hack the mind and can lead to a loss of self-awareness and divergence from reality.
Videos Mentioning Nootropics

AMA #3: Adaptogens, Fasting & Fertility, Bluetooth/EMF Risks, Cognitive Load Limits & More
Andrew Huberman
Substances or drugs that are believed to improve cognitive function, a topic for a future episode.

Researching Psilocybin's Effects on Depression - Dr. Rosalind Watts
Y Combinator
Substances taken to enhance cognitive functions like memory and focus, mentioned in the context of people manipulating their brain function outside of clinical depression treatment.

Periscope - May 2020
Naval
Strongly advised against taking regularly, as they are seen as drugs that hack the mind and can lead to a loss of self-awareness and divergence from reality.

Sam Altman's Whale AMA
Y Combinator
The speaker has tried nootropics but found they either didn't work or caused side effects like headaches. Modafinil is specifically mentioned as working but having undesirable side effects.