What You Eat Matters: A Practical Nourishment Guide

What You Eat Matters: A Practical Nourishment Guide
The Journal
Body & WellnessJuly 202614 min read

What You Eat Matters: A Practical Nourishment Guide

Food is not the enemy. But confusion about food — what to eat, when to eat, how much — is one of the most common sources of stress I see in my patients. This guide is my attempt to cut through the noise.

Dr. AshFounder & Clinical Aesthetics Specialist, The Skin Parlor™

want to be clear about something before we begin: I am not a registered dietitian or a licensed nutritionist. What I am is a NASM Certified Nutrition Coach and Behavioral Modification Specialist — and that distinction matters. My role is not to prescribe therapeutic diets or treat disease through nutrition. My role is to help you understand the principles of nourishment, identify patterns that may be working against you, and build sustainable habits that support your overall health.

If you have a diagnosed condition — Type 2 diabetes, hypertension, thyroid disease, elevated cholesterol — please work with your physician and a registered dietitian for individualized medical nutrition therapy. What follows is general wellness education, not a substitute for that care. That said, I believe deeply that understanding the basics of how food works in the body is something every person deserves — regardless of whether they have a diagnosis.

You do not need a perfect diet. You need a consistent one. The gap between those two things is where most people get lost.

Food Noise — And Why It Is Not Your Fault

Food noise is the term used to describe the constant, intrusive mental chatter about food — what to eat, whether you ate too much, what you should have eaten instead, what you will eat tomorrow to compensate. It is exhausting. And it is far more common than most people realize.

Food noise is not a character flaw. It is often the result of years of diet culture — the cycle of restriction, craving, overeating, guilt, and restriction again. When the body has been repeatedly deprived, it becomes hypervigilant about food. The brain starts treating food as a scarce resource, even when it is not.

The antidote to food noise is not more willpower. It is consistency, adequacy, and permission. When your body trusts that it will be fed — regularly, sufficiently, with foods that satisfy — the noise begins to quiet. This is not a quick fix. It is a process. But it is possible.

Practically speaking: eat at regular intervals. Do not skip meals in an attempt to "save" calories for later — this almost always backfires. Aim for three balanced meals and one to two snacks if needed. When you eat consistently, your blood sugar stabilizes, your hunger hormones regulate, and the mental preoccupation with food begins to ease.

What a Balanced Plate Actually Looks Like

The word "balanced" gets used so often it has lost its meaning. Let me give it back. A balanced meal contains four things: a quality protein source, a complex carbohydrate, a healthy fat, and vegetables or fruit. Not in equal portions — but all four present.

Protein is the anchor. It is the most satiating macronutrient, meaning it keeps you full longer and reduces the likelihood of overeating later. Aim for a palm-sized portion of protein at each meal — chicken, fish, eggs, legumes, Greek yogurt, cottage cheese, or lean beef. If you are on a GLP-1 medication, adequate protein intake is especially important to preserve muscle mass as you lose weight.

Complex carbohydrates are not the enemy. They are the body's preferred fuel source. The difference between a complex carbohydrate and a refined one is fiber — and fiber is what slows digestion, stabilizes blood sugar, and keeps you satisfied. Choose whole grains, legumes, sweet potatoes, oats, and fruit over white bread, white rice, and processed snack foods. The goal is not to eliminate carbohydrates. It is to choose the ones that work with your body rather than against it.

Healthy fats — olive oil, avocado, nuts, seeds, fatty fish — are essential for hormone production, brain function, and the absorption of fat-soluble vitamins. They also slow gastric emptying, which means they help you feel full. Do not fear fat. Fear the absence of it.

Vegetables and fruit provide fiber, micronutrients, and antioxidants that no supplement can fully replicate. Aim to fill half your plate with non-starchy vegetables at lunch and dinner. Color variety matters — different pigments indicate different phytonutrients. A plate that is all beige is a plate that is missing something.

A plate that is all beige is a plate that is missing something. Color is not decoration — it is nutrition.

Intermittent Fasting — What the Evidence Actually Says

Intermittent fasting has become one of the most discussed dietary approaches of the last decade — and one of the most misunderstood. Let me offer a grounded perspective.

Intermittent fasting is an eating pattern, not a diet. It does not specify what you eat — only when. The most common approach is the 16:8 method: a 16-hour fasting window and an 8-hour eating window. For many people, this simply means skipping breakfast and eating between noon and 8 p.m.

The evidence suggests that intermittent fasting can be an effective tool for weight management, blood sugar regulation, and metabolic health — for some people. The key phrase is "for some people." It is not universally appropriate. For individuals with a history of disordered eating, intermittent fasting can reinforce restriction patterns and worsen the relationship with food. For people with diabetes who are on insulin or certain medications, extended fasting periods can cause dangerous blood sugar fluctuations. For anyone who is pregnant, breastfeeding, or underweight, it is not appropriate.

If you are considering intermittent fasting, discuss it with your physician first. If you are cleared to try it, the most important thing to remember is this: the eating window still needs to contain adequate nutrition. Intermittent fasting is not a license to under-eat. It is simply a different schedule for eating enough.

Nutrition and Chronic Conditions — What You Should Know

I want to address several conditions I see frequently in my patients, because the connection between food and these conditions is real, significant, and often underestimated. I am speaking here in general wellness terms — not providing medical nutrition therapy. Please work with your care team for individualized guidance.

Type 2 Diabetes

Type 2 diabetes is fundamentally a condition of blood sugar dysregulation — and food is one of the most powerful tools available for managing it. The goal is not to eliminate carbohydrates entirely, but to choose carbohydrates that produce a slower, more gradual rise in blood sugar. This means prioritizing fiber-rich whole grains, legumes, and non-starchy vegetables over refined grains and added sugars.

Portion size matters significantly. Even healthy carbohydrates can spike blood sugar when consumed in large quantities. Pairing carbohydrates with protein and fat at every meal slows digestion and blunts the glucose response. Eating at consistent times — rather than skipping meals and then overeating — helps stabilize blood sugar throughout the day.

Added sugar is the most direct dietary driver of blood sugar instability. Sweetened beverages — sodas, juices, sweet teas, flavored coffees — are particularly problematic because they deliver large amounts of sugar rapidly, with no fiber to slow absorption. If you have Type 2 diabetes or prediabetes, liquid sugar is the first thing to address.

Hypertension

High blood pressure is one of the most common conditions I see — and one of the most diet-responsive. Sodium is the most well-known dietary factor, but it is not the only one. Potassium, magnesium, and fiber all play meaningful roles in blood pressure regulation.

The DASH diet — Dietary Approaches to Stop Hypertension — is one of the most evidence-supported dietary patterns for blood pressure management. It emphasizes fruits, vegetables, whole grains, lean protein, and low-fat dairy, while limiting sodium, red meat, and added sugars. You do not need to follow it rigidly, but its principles are sound.

Sodium awareness is important. The recommendation for most adults is no more than 2,300 milligrams per day — and for those with hypertension, often less. The challenge is that most dietary sodium does not come from the salt shaker. It comes from processed foods, restaurant meals, canned goods, and packaged snacks. Reading labels and cooking at home more frequently are the most effective strategies.

Increasing potassium-rich foods — bananas, sweet potatoes, leafy greens, beans, avocado — helps counteract the blood-pressure-raising effects of sodium. This is a simple, practical shift that most people can make without dramatic dietary overhaul.

Thyroid Health

Thyroid conditions — particularly hypothyroidism — are common, and the relationship between thyroid function and nutrition is real but often overstated in wellness spaces. Let me offer a grounded perspective.

Iodine is essential for thyroid hormone production. In the United States, iodine deficiency is uncommon because iodized salt is widely used — but it is worth knowing that sea salt and many specialty salts are not iodized. Seafood, dairy, and eggs are good dietary sources of iodine.

Selenium supports the conversion of thyroid hormones into their active form. Brazil nuts are an exceptionally rich source — two to three per day provides adequate selenium. Tuna, sardines, eggs, and sunflower seeds are also good sources.

Goitrogens — compounds found in cruciferous vegetables like broccoli, kale, and cabbage — have been associated with thyroid disruption in very large quantities. However, the evidence does not support avoiding these vegetables in normal dietary amounts. Cooking reduces goitrogenic activity significantly. Unless your physician has specifically advised you to limit these foods, there is no reason to avoid them.

If you are taking levothyroxine or another thyroid medication, timing matters. Most thyroid medications should be taken on an empty stomach, and certain foods and supplements — particularly calcium, iron, and high-fiber foods — can interfere with absorption if consumed too close to the medication. Your prescribing physician should guide you on timing.

Cholesterol

Elevated cholesterol is one of the conditions where dietary change can make a meaningful difference — though the relationship between diet and cholesterol is more nuanced than the old "avoid eggs and butter" messaging suggested.

Saturated fat — found in red meat, full-fat dairy, butter, and coconut oil — raises LDL cholesterol in most people. Limiting saturated fat and replacing it with unsaturated fats — olive oil, avocado, nuts, fatty fish — is one of the most evidence-supported dietary strategies for improving cholesterol profiles.

Trans fats, found in partially hydrogenated oils and many processed foods, raise LDL and lower HDL simultaneously — the worst possible combination. They should be avoided entirely. Check ingredient labels for "partially hydrogenated oil."

Soluble fiber is a powerful cholesterol-lowering tool that is underutilized. Oats, barley, beans, lentils, apples, and flaxseed are all rich in soluble fiber, which binds to cholesterol in the digestive tract and removes it from the body. Adding a bowl of oatmeal to your morning routine is one of the simplest, most evidence-backed dietary changes you can make for cardiovascular health.

Dietary cholesterol — the cholesterol found in eggs and shellfish — has a smaller effect on blood cholesterol than was once believed for most people. Current evidence does not support strict limits on egg consumption for the general population. However, individual responses vary, and if you have familial hypercholesterolemia or another condition affecting cholesterol metabolism, your physician's guidance takes precedence.

The Real Risk of an Unbalanced Diet

I want to be direct about something that does not get said enough: the consequences of a chronically poor diet are not abstract. They are real, cumulative, and often silent until they are not.

Chronic inflammation is one of the most significant downstream effects of a diet high in ultra-processed foods, refined sugars, and unhealthy fats. Inflammation is the body's response to threat — and when the diet is consistently inflammatory, the body exists in a state of low-grade, chronic threat response. Over time, this contributes to insulin resistance, cardiovascular disease, cognitive decline, and accelerated aging — including accelerated skin aging.

Nutrient deficiencies are another underappreciated consequence. A diet that is calorically adequate but nutritionally poor — high in processed foods, low in whole foods — can leave the body deficient in vitamins, minerals, and antioxidants that are essential for cellular repair, immune function, hormone production, and skin health. You can be overfed and undernourished at the same time. Many people are.

Gut health is increasingly understood to be central to overall health — immune function, mood, metabolism, and skin condition are all influenced by the composition of the gut microbiome. A diet low in fiber and high in processed foods depletes the diversity of gut bacteria. A diet rich in whole plant foods, fermented foods, and fiber supports a thriving microbiome. The skin-gut connection is real — and it is one of the reasons I discuss nutrition with every patient who comes to me with inflammatory skin conditions.

You can be overfed and undernourished at the same time. Many people are — and their skin, energy, and health reflect it.

A Conversation About Sweets

I am not going to tell you to never eat sugar. That is not realistic, and it is not what the evidence supports. What I will tell you is that the relationship most people have with sweets is worth examining — not with judgment, but with curiosity.

Added sugar — the sugar added to processed foods and beverages, as opposed to the naturally occurring sugar in fruit — is the form that causes the most metabolic harm when consumed in excess. The American Heart Association recommends no more than 25 grams of added sugar per day for women and 36 grams for men. A single 12-ounce can of regular soda contains approximately 39 grams. One flavored yogurt can contain 20 to 25 grams. The accumulation happens quickly and invisibly.

Sugar is also uniquely capable of driving cravings. It activates the brain's reward pathways in ways that can create a cycle of craving, consumption, and craving again. This is not a moral failing — it is neurochemistry. Understanding it removes the shame and makes it easier to address.

The most effective strategy I have seen for reducing sugar consumption is not elimination — it is substitution and satisfaction. When you eat enough protein, fat, and fiber at your main meals, the intensity of sugar cravings decreases significantly. When you allow yourself to enjoy a small, intentional sweet — a piece of dark chocolate, a serving of fruit with yogurt — without guilt, the compulsive quality of the craving often diminishes.

For skin specifically: high sugar intake drives a process called glycation, in which sugar molecules bind to collagen and elastin fibers, making them stiff and brittle. This accelerates the formation of fine lines and wrinkles and contributes to a dull, uneven complexion. The connection between diet and skin aging is not theoretical — it is biochemical. What you eat shows up on your face over time.

Practical Starting Points

If you have read this far and feel overwhelmed, I want to offer something simple. You do not need to change everything at once. Behavioral change research is clear: small, consistent changes compound over time far more effectively than dramatic overhauls that are abandoned within weeks.

Start with one thing. Add a vegetable to one meal per day. Swap a sweetened beverage for water or sparkling water. Eat breakfast within an hour of waking. Add a protein source to your afternoon snack. These are not glamorous interventions. They are the kind of quiet, consistent choices that, over months and years, change the trajectory of your health.

Hydration deserves a mention here. Water is involved in virtually every metabolic process in the body — digestion, circulation, temperature regulation, cellular repair, and skin hydration. Most adults are mildly dehydrated most of the time. Aim for half your body weight in ounces of water per day as a general starting point. More if you exercise, live in a hot climate, or are on a GLP-1 medication.

Sleep and stress are not nutrition topics, strictly speaking — but they are inseparable from nutrition outcomes. Poor sleep elevates cortisol and ghrelin, the hunger hormone, while suppressing leptin, the satiety hormone. Chronic stress drives emotional eating and sugar cravings. You cannot out-eat a sleep deficit or a stress response. Nourishment is holistic.

You cannot out-eat a sleep deficit. Nourishment is not only what is on your plate — it is how you live around the plate.

A Final Word

I wrote this guide because I see, every day, how much confusion and shame surrounds food. Patients who have been told conflicting things by different providers. Patients who have tried every diet and feel like failures. Patients who are doing their best with incomplete information.

You are not a failure. The information landscape around nutrition is genuinely confusing, and the diet industry has a financial interest in keeping it that way. The fundamentals, however, are not complicated: eat whole foods, mostly plants, adequate protein, and healthy fats. Eat consistently. Drink water. Move your body. Sleep. Manage stress. Allow yourself pleasure without guilt.

If you want to go deeper — if you have a specific condition, a specific goal, or simply want accountability and structure — I am here for that conversation. Nutrition coaching is part of the care I offer at The Skin Parlor™ because I believe that what happens inside the body is inseparable from what we see on the outside.

With warmth and intention,

Dr. Ashley L. Harris, PhD, MBA, M.Ed.Founder, The Skin Parlor™NASM Certified Nutrition CoachBehavioral Modification Specialist
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