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At Greendoor, we focus on cognitive enhancement — but we understand that mental performance doesn’t exist in isolation. Physical health, especially chronic conditions like diabetes, has a direct and profound impact on how we think, feel, and function. The connection between blood sugar, mood, focus, and brain fog is real — and often overlooked. Diabetes…

About Greendoor Greendoor is a platform for people who think deeply — and want to think more clearly.We explore nootropics, cognitive enhancement, and mental performance with curiosity, caution, and respect for the complexity of the human brain. Founded by cognitive researcher and nootropics enthusiast Liam T. Donovan, Greendoor is built on the belief that better…

Our Story Greendoor wasn’t built in a lab — it was born out of lived experience, late nights, and a relentless drive to think more clearly in a world that demands too much. It started with one question:What if there were better ways to optimize how we think, focus, and function? From Brain Fog to…

At Greendoor, we understand that cognitive enhancement isn’t just about boosting productivity — it’s often part of a broader transition. From burnout to clarity. From recovery to function. From surviving to actively shaping how you think and feel. We serve people in motion — those leaving behind fog, fatigue, or stress, and stepping into a…