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You might expect creatine to feel stimulating like caffeine, but it doesn't work that way. Creatine provides sustained energy without jitters or crashes – you'll likely notice you can maintain focus longer and think more clearly during demanding mental tasks, rather than feeling "energized."

Here's why ashwagandha works differently than other stress supplements: it doesn't mask stress symptoms, it helps your body adapt to stress more efficiently.

Taurine works by supporting your brain's natural energy production rather than artificially stimulating it – think of it as upgrading your mental engine rather than just adding more fuel.

Unlike supplements that work quickly, vitamin D's cognitive benefits unfold over 8-16 weeks – but here's the twist: you might feel worse before you feel better if you're severely deficient.

You'll be tempted to take more when you don't feel a dramatic change in the first hour, but resist the urge. L-theanine works through subtraction, not addition.