![Smart Drug Smarts: Brain Optimization | Nootropics | Neuroscience show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/068/132/small/smart-drug-smarts-brain-optimization-nootropics-neuroscience.jpg)
Summary: "Grinders" take their stylistic queues from piercing shops, tattoo parlors and custom auto mechanics -- combining skills in electrical circuitry and biology to leap past "wearable" technology straight into integrated doodads like an LED compass that lives in your hand, or under-the-skin magnets (which some claim allow them to "feel" magnetic fields after a few months of brain plasticity and practice).