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    The Science of Flavor with Arielle Johnson

    en-usJuly 12, 2024
    What role does science play in flavor development?
    How can our perception of food change over time?
    What is molecular gastronomy and its significance?
    What is the focus of Ariel Johnson's book?
    How do genetics and experiences affect taste preferences?

    Podcast Summary

    • Flavor science and culinary artFlavor science and culinary art are interconnected, with scientists using their knowledge of flavor chemistry to create innovative dishes and sometimes earn Michelin stars

      The world of food goes beyond just eating and enjoying the taste. It's a complex interplay of science, creativity, and even luck. Flavor, for instance, is not just a matter of chance but a result of careful consideration and experimentation. Ariel Johnson, a flavor scientist, shared her experiences working with renowned restaurants like Noma, where she used her knowledge of flavor chemistry to push the boundaries of culinary art. The collaboration between science and cooking leads to innovative dishes and, in some cases, Michelin stars. So, the next time you savor a delicious meal, remember that there's a whole universe of science, creativity, and passion behind it.

    • Flavor perceptionFlavor is a complex experience created by the interaction of taste and smell, with both senses contributing to our perception of food. The brain plays a crucial role in our perception of flavor by tricking us into feeling that the smell is coming from our mouth rather than our nose, and flavor is a multisensory experience involving both the senses of taste and smell.

      Flavor is a complex experience created by the interaction of taste and smell, with both senses contributing to our perception of food. Flavor is not just a simple sensation, but rather a result of various molecules binding with our taste and olfactory receptors in our mouth and nose. Furthermore, there are two types of olfaction: orthonasal (smelling through the nose) and retronasal (smelling through the back of the nose while eating). The brain plays a crucial role in our perception of flavor by tricking us into feeling that the smell is coming from our mouth rather than our nose. It's important to understand that the map of taste on the tongue is a misconception, and taste buds are actually more concentrated along the edges and tip of the tongue. In essence, flavor is a multisensory experience that involves both the brain and the senses of taste and smell.

    • Flavor combinationsUnique flavor combinations can lead to transcendental culinary experiences, like inverted toppings on hamburgers. Innovation and exploration are key in the world of flavor and cuisine.

      Flavor science is not just about individual tastes, but the unique combinations and discoveries that can lead to transcendental culinary experiences. This was exemplified in a conversation between Neil deGrasse Tyson and his driver, Taylor, who shared her discovery of enjoying hamburgers with inverted toppings for a more flavorful experience. The conversation also touched upon the evolution of cuisine, with Chinese cooking being one of the oldest continuously developing cuisines, and the concept of umami, the fifth taste, which was identified as the savory taste from glutamate. The discussion highlighted the importance of innovation and exploration in the world of flavor and cuisine.

    • Genetics and Environment impact on food tasteGenetics and environment interact to create unique chemical and biological expressions in food, resulting in distinct flavors. Environmental factors and cultural backgrounds can significantly impact perception of flavors, while cooking can alter flavors by breaking down complex molecules and creating new reactions.

      The taste and flavor of food can be influenced by both the genetic makeup of the organism and the environment in which it is grown or prepared. This interaction results in unique chemical and biological expressions that can lead to distinct flavors. For instance, the same grape clone grown in different regions will result in wines with different tastes due to the environmental factors at play. Similarly, people's experiences and cultural backgrounds can impact their perception of flavors. Cooking food can also significantly alter its flavors by breaking down complex molecules and creating new reactions. Accidental discoveries and missing ingredients have also led to the creation of many delicious culinary creations throughout history.

    • Concentration of taste moleculesCooking concentrates taste molecules by evaporating water, allowing for the preservation and enhancement of flavors through techniques like sous vide and low-temperature cooking in a vacuum or closed environment

      The process of cooking, especially reducing sauces, involves the concentration of taste molecules through the evaporation of water. This is due to the fact that taste molecules are not volatile and require lower air pressure to evaporate. Cooking techniques like sous vide and low-temperature cooking in a vacuum or closed environment have become popular in recent years as they allow for the preservation of flavors and the sealing in of juices. Despite advancements in cooking technology, natural flavors continue to be preferred by many, although the use of artificial flavors remains a multi-billion dollar industry. The environmental and psychological effects on flavor and taste are complex, and while some unhealthy foods may taste better than healthier options, this is not universally true.

    • Perception of FoodOur perception of food can change over time and our brains can learn to enjoy unfamiliar flavors. The food industry often prioritizes yield and uniformity over flavor.

      Our perception of food and what we find delicious can change over time, and a lot of resources have been dedicated to making highly processed, palatable foods profitable, while the natural flavors of plants and ingredients have been overlooked. For example, some people may dislike strong-smelling or unusual foods when they're young but come to appreciate them later in life. This is because our brains can adapt to new experiences and learn to enjoy flavors that were once unfamiliar. Additionally, the food industry has focused on maximizing yield and uniformity in agriculture, often at the expense of flavor. Ariel's book, "The Flavor Bible," aims to give readers the tools to understand the science of flavor and experiment with it in their own cooking, rather than dictating what is "correct." Overall, our tastes and preferences are subjective, and the joy of cooking comes from discovering new flavors and enjoying the process of creating delicious meals.

    • Taste preferencesOur taste preferences are influenced by both genetics and experiences. With repeated exposure, we can adapt to and develop a liking for previously unappealing foods.

      Our taste preferences are shaped by both genetics and experiences. While some foods may initially seem unappealing due to their strong flavors or bitterness, our taste buds can adapt and develop a liking for them with repeated exposure. This is a natural response as humans have an innate skepticism towards new things but learn to accept and even enjoy them once they don't cause harm. Molecular gastronomy, which involves studying food on a molecular level, is changing the way we eat by helping to enhance and preserve flavors, especially in mass-produced foods. It's also leading to innovations in creating new flavors and textures. However, it's important to note that the loss of flavor in many commercially grown fruits and vegetables is a relatively new phenomenon and efforts are being made to breed varieties with more robust flavors. Overall, our taste experiences are complex and multifaceted, shaped by both our biology and our cultural and personal histories.

    • Moon cookingCooking on the moon can be similar to Earth if conditions are controlled, but honey might not pour and growing food presents challenges. Taste is determined by molecular structure, and carbon dioxide creates a unique sensation.

      Cooking on the moon may not differ significantly from cooking on Earth, as long as the habitat modules are pressurized to maintain normal boiling points and atmospheric conditions. However, honey might not pour easily due to lower gravity, and growing food in microgravity presents unique challenges. In terms of taste, the flavors of food depend on its molecular structure, so reproducing that structure should result in the authentic taste. Carbon dioxide is special because it creates a prickly sensation on the tongue when dissolved in water, and this might be due to a distinct carbonation taste sensor or an interaction with the sour receptor. Other gases like helium don't produce this sensation. The experience of food is shaped by chemistry even after we swallow, with our bodies having receptors for various flavors and textures.

    • Understanding Flavor: Art and ScienceTaking a taste test and considering both the artistic and scientific aspects of flavor can deepen our appreciation for food and the experiences it brings.

      Learning from this Star Talk Special Edition episode is the importance of understanding both the art and science behind flavor. Ariel Sabar, the author of "The War on Blooms: And How I Found My Mother, My Self, and the Essence of Taste," emphasized the significance of taking a taste test before enjoying a meal, and shared that her recent book is a guide to unlocking the complexities of taste. By combining the artistic and scientific aspects of flavor, we can deepen our appreciation for food and the experiences it brings. Gary Oppenheimer, another guest on the show, added to the conversation by discussing his work as a flavor scientist and the role of sensory evaluation in the food industry. Overall, this episode highlights the interconnectedness of art and science, and encourages us to savor the richness of flavors in our daily lives.

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