Most people think addiction is about willpower or the drug itself.

But here's what neuroscience actually shows us: it's not what you take — it's how you take it. The same substance can be barely habit-forming when eaten, but incredibly reinforcing when smoked or injected.

This isn't about the drug being 'stronger' — it's about timing. Your brain's reward circuits follow the same conditioning principles as Pavlov's famous dogs, and the speed of absorption determines how quickly those neural pathways get carved.

By the end of this video, you'll understand exactly why route of administration might be the most critical factor in addiction risk — and what this means for recovery.