Deep-work professionals
The day is one or two long, demanding blocks (writing, engineering, analysis), where the goal is settled, sustained attention, and a caffeine spike-and-crash cycle works against you.
Where Core puts the weight
- Citicoline: a choline-donating compound studied as a focus and mental-energy ingredient for sustained attention.
- L-Theanine: studied for a calm, settled kind of attention without sedation, the counterweight to an over-caffeinated baseline.





