what do when two double espressos no longer make you feel alive

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When two double espressos no longer produce a significant effect, it may be due to tolerance built from consistent caffeine intake. discusses how caffeine impacts the body by increasing arousal and narrowing the visual window, which can be motivating. However, repeated use of caffeine and other stimulating substances can lead to a noticeable drop in energy levels afterward and diminished enthusiasm for activities 1 2. Caffeine blocks adenosine receptors, leading to alertness, but upon its metabolism, you may experience a "caffeine crash" due to adenosine build-up 3.

Caffeine and Motivation

Andrew explains how caffeine can be a great motivator due to its ability to cause arousal and narrow our visual window. He also discusses how energy drinks can produce similar effects and how we can induce these experiences through changing the state of our body or tricking ourselves with the placebo effect.
Huberman Lab
Dr. Emily Balcetis: Tools for Setting & Achieving Goals | Huberman Lab Podcast #83
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To reduce the potential for an afternoon energy crash and dependency, recommends delaying caffeine intake until 90 to 120 minutes after waking. This approach can extend the duration of caffeine's effects and reduce the likelihood of an energy dip in the afternoon. Additionally, it is advised to limit caffeine intake to less than 100mg after 4pm to avoid disrupting sleep 4.

For sustainable energy levels and to prevent a significant drop in afternoon energy, consider reducing or cycling your caffeine consumption. Incorporating a non-sleep deep rest protocol in the afternoon can also improve focus and alertness without relying on caffeine 5 6.