We Are the Fish, and Diet Culture Is the Water

From the kitchen to the clinic

[0:53]

Stephanie’s path into nutrition ran through a professional kitchen first. She went to culinary school, worked as a chef for several years, and then moved into clinical dietetics. The through line was there from high school, when she noticed a connection between performance, health, feeling good, and food, and became fascinated by the idea that food could nourish you. She describes that realization as feeling almost magical.

She found what was then the only program in the United States offering a dual nutrition and culinary degree, cooked professionally, loved it, and eventually recognised that the kitchen was not going to be her whole life. What she wanted was to be in sport and to work with individuals. Since then her practice has spanned D1 collegiate athletics, Olympic sport, professional sport, women’s sport, and the hospitality and longevity space.

Performance nutrition is not reserved for athletes

[2:07]

Alex opens with the most basic question available, and Stephanie’s answer reframes the entire category. The word performance, she acknowledges, feels like it belongs to athletes. She prefers to define it as helping anyone get better at the thing they love to do. For a runner, that means running faster and running better. For a parent, it might mean having the energy to be patient through the whole day and still have something left for the kids in the evening.

Alex reflects the point back: everyone is a high performing individual in whatever role they occupy. Stephanie agrees. Performance nutrition is simply using nutrition to support you in enjoying and being good at the things you actually care about.

Start with where you want to go, not with what you heard

[3:21]

Asked where a person should even begin, Stephanie starts with the individual rather than the information. Where are they coming from, what are their goals, what is their situation, and which areas are they actually willing or able to change. The volume of nutrition information people encounter, particularly on social media but also from everyone around them, creates a specific problem: hearing something does not make it true, and it does not make it applicable to you.

“Nutrition doesn’t start with what you’re hearing. It starts with where you want to go.” — Stephanie Miezin

The good food and bad food trap

[4:19]

Alex asks what she most often has to correct, and Stephanie identifies the biggest category immediately: the dichotomy that sorts food into good and bad. She is careful not to blame people for holding it, since the entire information environment encourages it. But nutrition is more complex than that, and individual foods rarely carry direct negative health consequences on their own.

What matters is the overall dietary pattern, the average over time of everything you are taking in and how your body responds to it. Everyone differs somewhat, but the literature does show clear patterns for what constitutes a generally healthful diet. Her point about knowledge is the one worth sitting with: understanding which nutrients foods provide, or how much of each macronutrient you need, is genuinely important, but knowledge is not what primarily drives behavior. Belief systems and food culture do.

The fish and the water

[6:08]

Pressed on what she means by something deeper than the food, Stephanie goes to morality. Food choices carry moral weight in our culture. What you eat, what you choose, and where you shop all signal something to other people, consciously or not. She calls this performative nutrition, and she places it inside the broader phenomenon of diet culture.

Her metaphor for it is the strongest line in the episode. We are the fish, and diet culture is the water around us. It is invisible precisely because it is everywhere: the language around food, the language around bodies, the assumptions we never examine. She notes that while this is often discussed as a women’s issue, in her view it affects every person to some degree.

The practical takeaway is that reflection is part of the work. Most health and performance interventions are external. You go to the gym, you take the cold plunge, you order the meal. Nutrition is different because it is not a single daily action. You are making food choices repeatedly, all day, which is exactly why the internal work of understanding your own relationship with food matters so much.

The eighteen dollar strawberry

[8:11]

Alex tests the theory against a specific cultural phenomenon: the social media hype around shopping at certain premium grocery stores. Stephanie confirms it fits the pattern exactly. There is status attached to where you buy your food in the same way there is status attached to the logo on your clothing. Alex lands the comparison: it is the food equivalent of flexing a Lamborghini. Stephanie does not disagree. Eighteen dollar strawberries are a flex.

Interrogating the goal beneath the goal

[8:42]

When someone arrives with a training goal, Stephanie wants to know the reason underneath it. For an elite athlete the chain is relatively simple. For everyone else, which is most of us, it is worth asking a harder question. If the goal is to get stronger: is it that you want to be stronger, that you want to look better, or that you want to be able to pick up your kids? The answer changes the plan, and sometimes it changes the goal.

From there, the reframe she keeps returning to: food is a tool and food is your friend. The mindset of using food to reach your goals is fundamentally different from the mindset that food is working against you, that it needs to be cut, restricted, and defended against. That second framing is the language of fad diets, and Stephanie is direct that it tends to be more harmful than helpful, because it actively builds a worse relationship with food.

“It’s having this mindset of I can use food to help me reach my goals, versus what we often see, which is that food is trying to work against me.” — Stephanie Miezin

The restriction cycle

[11:07]

Asked whether there is a recurring theme among the high performers she has worked with, Stephanie names the mindset shift away from restriction. Most people arrive having already tried something. Very often that something involved cutting: fewer calories, fewer carbohydrates. Body recomposition, meaning gaining or at least maintaining muscle while losing fat, is one of the most common goals she encounters, and cutting intake is the most common way people attempt it.

The pattern that follows is predictable. The restriction goes too far, it stops being sustainable, and the person ends up oscillating between eating too much and eating too little without understanding why. Her correction is blunt: more restriction is not better, and less is not more. What actually produces results is consistency, the accumulation of reasonably good actions over a long period. It is not flashy, and she knows it.

What elite athletes are actually doing

[13:30]

Alex asks whether there is some hidden knowledge that elite performers have access to. There is not. Stephanie has worked with some of the best athletes in the world, and by her account they are typically not doing anything exotic. They practice consistency, they tune into their bodies, and they manage their training loads well. Do the foundational things, she says, and you will probably get where you need to go and actually stay there. She flags that second part deliberately. Getting there and staying there are different problems.

How long before you judge whether it is working

[14:06]

The timeline depends entirely on the outcome you are watching. Better energy might be noticeable within a few days of better choices. Changes in body composition take several weeks, potentially months. That gap is where most people quit, and it is exactly where consistency has to carry the load.

Stephanie recommends treating scale feedback with considerable caution, since daily fluctuations in water weight obscure what is actually happening underneath. Better indicators include how you feel in your body, how you feel in the gym, and whether you are making progress in the activity itself. That last one matters because of how nutrition actually works: it is not that nutrition makes you run faster, it is that nutrition gives you the energy to train harder, which produces the adaptations that make you run faster.

And then there is the one she rates highly: how your clothes fit. The scale can stay flat while your clothes fit differently, and that is often a signal that you are holding or building muscle while losing fat. Alex asks how that is possible, and Stephanie walks through it. Training plus adequate nutrition signals the body to build and recover muscle. Over weeks and months you add muscle while body fat decreases, and the two changes offset each other on the scale.

Smart scales and body composition at home

[17:11]

On the consumer body composition scales that have become widely available, Stephanie declines to call them good or bad at face value. It depends on the individual and the mindset they bring. She generally does not love them as a daily tool, and recommends looking at weekly trends instead, because physiological change takes many days to register. As she puts it, one great training session does not mean the muscle is there now, and one so-called cheat meal, a concept she does not accept anyway, does not erase anything.

Technically, she notes these devices rely on a method that is not especially accurate and is highly sensitive to hydration status. If someone wants to use one, her guidance is to make the conditions consistent: same time each morning, after waking and using the bathroom, so hydration is roughly comparable across readings. The value is in tracking your own trend against yourself rather than in the absolute number.

Majoring in the minors

[19:08]

Alex raises the supplement aisle next to the gym, the pre-workout and post-workout shake culture, and asks whether that is performance nutrition or just gym culture. Stephanie’s answer is that it is some of both, with a considerable amount of capitalism in the mix. Can those products help? Sure. Do they work for some people? Absolutely. But nothing about them is required, and the idea that you cannot train well without a pre-workout is not true.

Her phrase for this is majoring in the minors: placing heavy emphasis on strategies with small effects while neglecting the ones with large effects. The big rocks she lists are unglamorous. Are you eating three meals? Are you eating enough calories across the day for your goals? Are your meals balanced enough in their blend of foods and macronutrients that you finish them satisfied and energized? Those questions matter far more than a pre-workout, which she also notes may contain ingredients that are not always fully disclosed.

“We’re putting all this emphasis on strategies that have smaller amounts of impact than the big rocks.” — Stephanie Miezin

Deficiency is not optimization

[20:28]

Alex brings up the protein phenomenon, having recently walked through Costco past protein chips and protein salsa, and asks whether protein is genuinely essential or simply the current fad. Stephanie’s answer is that it is both a trend and a trend with real science behind it.

She explains the history. The long-standing recommended daily allowance for protein has been 0.8 grams per kilogram of body weight per day. That figure was established on the basis that this amount would prevent protein deficiency for the vast majority of the population, protecting against loss of muscle mass and negative protein balance. Her distinction is the one most people have never heard.

“Deficiency isn’t optimization. Preventing deficiency doesn’t mean great. It just means you’re not at the bottom.” — Stephanie Miezin

For most people, intake above that older figure is better, particularly for anyone trying to gain muscle, support longevity, or prevent the loss of muscle mass over time that erodes quality of life and the ability to do ordinary daily activities. The range Stephanie works with is 1.2 to 1.6 grams per kilogram of body weight, and she offers the simple conversion: take your weight in pounds and divide by 2.2 to get kilograms.

But more is not endlessly better. There is a threshold. For general health and longevity, 1.2 to 1.6 is the working range. For someone aiming to maintain or build muscle while losing fat, typically within a calorie deficit, intake needs to go above 1.6 to send the right signal. And she adds an important qualifier to the whole conversation: if the goal is building muscle, protein is not as important as the strength training itself.

Does the source matter?

[24:03]

Alex brings a personal anecdote. He had been hitting his protein target from whatever was convenient, including yogurt and shakes, until a friend at the gym told him it needed to come from meat to count. Stephanie’s answer separates two questions that usually get conflated.

The most important thing is hitting your total grams across the day. Source is the second question, not the first. On muscle specifically, the research indicates that if you are meeting your daily target, plant sources are considered about as effective as animal sources for rebuilding, repairing, and growing muscle.

Longevity is where the answer diverges, and Stephanie frames it with a principle worth keeping: nutrition questions always have to specify good for what, because the outcome determines the answer. For longevity outcomes, the research points toward better results the more protein comes from plant sources.

Asked why, she is candid that the mechanism is not fully settled, then offers what is understood. Plant protein sources arrive inside a food package that tends to carry other benefits: more fiber, different vitamins, phytonutrients that help regulate oxidation, keep inflammation low, and feed gut bacteria. There may also be something about the protein itself. And on the other side, higher intake of certain animal proteins, particularly red meat and especially processed red meat, carries elevated colon cancer risk over time. Her emphasis lands on exposure over time rather than any individual meal. This is about the dietary pattern, month over month, not whether you had pepperoni today.

Settling the gym myth

[26:45]

Alex raises the persistent belief in gym culture that people eating plant-based cannot build as much muscle. Stephanie’s answer is direct: not true. She adds a useful distinction, which is that gaining muscle and maintaining muscle have different requirements. Building typically takes somewhat more protein, maintaining somewhat less. And in both cases, the resistance training has to be in the picture. As she puts it, it is rarely absolute.

Nutrition is an extension of training

[27:30]

Alex synthesizes the argument: nutrition is complementary to training rather than a foundation underneath it. Stephanie agrees and sharpens it. Nutrition is an extension of training.

She describes how this works in practice at Cascaid. The individual, the health seeker or athlete, sits at the center, with the full team of practitioners arranged around them. Stephanie wants to see everyone else’s recommendations before she builds her own. Nutrition, deliberately, comes last.

Her reasoning is not that nutrition matters less. It is that the nutrition plan should be built to support everything else that is helping the person reach their goal, rather than existing as a parallel track. Some nutrition variables, like fiber intake, are independent of any given training day. But the plan as a whole is strongest when it is constructed to serve the rest of the program rather than to satisfy an abstract standard of eating well.

“Nutrition is best when it supports everything else as well, not just eating well in a certain way just to say that you’re doing that.” — Stephanie Miezin

Performance is not performative

[29:22]

Asked what she would leave listeners with, Stephanie returns to the word that opened the episode. Performance does not feel like it applies to people who do not identify as athletes, but it does. It helps you be a better version of yourself. Her closing distinction is a neat one: it is not performative, it is helping you perform. Whether that is in sport or simply in life, the point is to be, do, and feel better at whatever it is you actually want to do.