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Essentials: How Smell, Taste & Pheromones Shape Behavior

May 1, 2025 39m 51s 10 insights
In this Huberman Lab Essentials episode, I explore how your sense of smell (olfaction), taste, and chemical sensing influence memory, alertness, focus, and even communication between people. I explain how these senses help us detect chemicals in the environment and respond to a variety of environmental cues. I discuss the connection between the olfactory system and cognitive performance, and I provide practical tools to enhance learning, sensory function, and brain health. Additionally, I examine how chemical signals exchanged between people subtly influence emotions, biology, and social bonds. Huberman Lab Essentials episodes are approximately 30 minutes long and focus on key science and protocol takeaways from past Huberman Lab episodes. Essentials are released every Thursday, while full-length episodes continue to air every Monday. Read the episode show notes at hubermanlab.com. Huberman Lab Essentials are short episodes focused on essential science and protocol takeaways from past full-length Huberman Lab episodes. Watch or listen to the full-length episode at ⁠⁠⁠hubermanlab.com⁠⁠⁠.
Actionable Insights

1. Nasal Breathing for Focus & Learning

Focus on nasal breathing during any focused work that doesn’t require speaking or eating, as inhaling through the nose increases alertness, attention, focus, and memory, improving learning outcomes.

2. Eliminate PFAS from Cookware

Actively choose and use cookware that is completely PFAS and toxin-free, such as Our Place products, to avoid toxic compounds linked to hormone disruption, gut microbiome issues, and fertility problems.

3. Daily Electrolyte Intake

Dissolve one packet of Element in 16-32 ounces of water and drink it first thing in the morning, and consume another packet during physical exercise, especially on hot days, to ensure proper hydration and adequate electrolyte balance.

4. Train & Enhance Smell

Actively interact with a variety of odors, preferably positive ones, and practice sniffing more to train and enhance your sense of smell, as this system is highly amenable to rapid behavioral training and helps keep it ’tuned up'.

5. Olfactory Training Post-Injury

If recovering from a head injury, engage in olfactory training by closely interacting with odors and focusing on inhaling more to enhance your sense of smell, which can stimulate new neuron growth and indicate sensory performance recovery.

6. Daily Foundational Nutrition (AG1)

Consider taking AG1 daily, as it’s a vitamin, mineral, and probiotic drink with clinically studied strains that can support digestive and immune health, improve bowel regularity, reduce bloating, and contribute to overall mental and physical performance.

7. Heighten Smell & Taste Perception

To enhance perception, take an object like an orange, smell it, perform 10-15 inhales through the nose, and then smell it again to significantly increase the richness of your experience of that smell and taste.

8. Boost Alertness with Peppermint

Sniff peppermint or other minty scents to increase attention and create an arousal response, which can help wake up your system and improve focus, though less intensely than ammonia salts.

9. Recognize Subconscious Chemical Cues

Be aware that humans subconsciously sense and evaluate chemicals from others (e.g., through breath or skin contact like handshakes followed by touching eyes), and observe these behaviors in your environment to understand interpersonal chemical communication.

10. Caution: Avoid Direct Ammonia Sniffing

Do not sniff real ammonia directly or too closely, as it is a toxic scent that can damage your olfactory epithelium and vision; if using smelling salts, understand proper usage to avoid severe damage to your olfactory pathway.