Using Cortisol & Adrenaline to Boost Our Energy & Immune System Function | Huberman Lab Podcast #18

Caffeine Effects

Caffeine's role in learning and immunity is multifaceted. Andrew Huberman highlights a study showing that habitual coffee consumption alters brain connectivity, potentially increasing anxiety but also enhancing alertness and focus 1. This altered connectivity can be beneficial or detrimental, depending on individual predispositions to anxiety. Additionally, caffeine can boost immune function by increasing adrenaline, especially when consumed occasionally 2.

Drinking some hot caffeinated tea or some hot coffee, even provided you don't get dehydrated from it because you're also drinking some water, can probably improve your immune system function by way of increasing adrenaline release.

--- Andrew Huberman

Huberman suggests using caffeine strategically, such as delaying intake until later in learning sessions to enhance cognitive plasticity.

   

Memory Strategies

Optimizing memory involves strategic timing of adrenaline spikes. Andrew Huberman explains that increasing epinephrine after learning can consolidate information by engaging neuroplasticity mechanisms during sleep 3. This process is not limited to negative events; it can be harnessed for positive learning experiences. Huberman recommends a 90-minute focus session followed by activities like cold showers or intense breathing to boost epinephrine levels 4.

You can remember things better if you increase your alertness, aka your level of epinephrine and cortisol after, immediately after something that you want to learn.

--- Andrew Huberman

This method enhances memory retention by priming the brain's memory encoding systems.

   

Nootropics & Energy

Nootropics offer diverse pathways to boost energy and cognitive function. Andrew Huberman categorizes them into those that increase blood glucose and those that enhance cholinergic system activity 5. While some nootropics like paracetams elevate blood glucose to improve performance, others like choline work without affecting glucose levels. Huberman emphasizes the importance of neural energy, derived from neurotransmitters like cortisol and epinephrine, over traditional food energy.

The energy that we're talking about today is actually a much more powerful one than the one that you derive from food.

--- Andrew Huberman

Additionally, compounds like apigenin can reduce cortisol and calm the nervous system, offering a balance to the stimulating effects of nootropics 6.