Finding the Right Diet: A Functional Nutritionist's Approach

There is no universally “right” diet — only the right diet for you.

Functional nutrition is about uncovering what your body needs to thrive. Whether you’re struggling with uncomfortable symptoms or looking to reduce weight and achieve metabolic balance, the goal is the same: optimal health through personalised, evidence-based nutrition.

Figuring out what the perfect diet is for you can feel overwhelming. From Keto and Vegan to Paleo and Intermittent Fasting, every approach has its benefits — but there is no one-size-fits-all solution. Each person’s nutritional needs are shaped by their unique biology, immune system, ethical values, and nutrient requirements. The perfect diet is one that supports your body’s individual biochemistry — and this is where I can help guide you.

Photo: Kathryn Simonelli

Understanding the Individual Body

Our bodies are remarkably complex, with metabolic and digestive systems that respond differently to various foods. Functional medicine recognises that bio-individuality — your genetics, gut microbiome, environment, and lifestyle — determines how well you process and utilise nutrients. What nourishes one person may trigger fatigue, inflammation, or discomfort in another. By assessing your unique physiology through functional medicine testing — including blood work, stool analysis, and urinary organic acids testing — we can identify the diet and nutrient needs to best support your energy, mood, and overall health.

Food Intolerances and Immune Response

While it may seem that we should be able to eat anything, food intolerances are common. The main triggers include dairy, gluten, soy, and eggs. Unresolved intolerances can place chronic stress on the digestive and immune systems, leading to symptoms such as bloating, fatigue, headaches, and inflammation. Over time, these issues may contribute to leaky gut syndrome, where proteins meant to remain in the gut enter the bloodstream, prompting immune activation that can lead to autoimmune conditions. In such cases, an elimination diet can be invaluable. This involves removing trigger foods for several weeks, then reintroducing them systematically to pinpoint sensitivities and reduce immune over-activation. The outcome is not restriction, but clarity — empowering you to make informed, nourishing food choices.

Supporting the Immune System Through Nutrition

A balanced immune system relies on nutrient density and reduced inflammation. Diets high in refined sugars and processed foods can weaken immune defences, while a diverse, plant-rich diet supports optimal function. Key nutrients such as zinc, vitamin C, omega-3 fatty acids, and phytonutrients from colourful fruits and vegetables help modulate immune responses and promote resilience. Functional nutrition emphasises these therapeutic foods to bring the immune system back into balance.

Ethical and Lifestyle Considerations

Food is not only fuel — it’s also a reflection of personal values and environmental awareness. Many individuals choose plant-based or sustainably sourced diets for ethical or ecological reasons. Functional nutrition integrates these preferences with health priorities, while ensuring adequate protein and nutrient intake. With thoughtful supplementation if needed, this approach supports both nutritional adequacy and integrity in your dietary philosophy.

Personalised Nutrient Needs

Your nutrient requirements depend on factors such as age, hormonal status, physical activity, and health conditions. Children, for example, have higher protein and antioxidant needs, while women navigating hormonal transitions may benefit from tailored support in minerals and healthy fats.

Reducing Weight and Achieving Metabolic Balance

Chronic stress, poor sleep, and inflammatory foods can all impact the body’s ability to maintain a healthy weight. Based on comprehensive blood testing and personal health data, the Metabolic Balance® program from Germany provides a personalised nutrition plan to regulate hormones, restore metabolic harmony, and promote sustainable weight loss without deprivation. Many people also experience improved digestion, better sleep, and lasting energy as their metabolism recalibrates naturally.

Your Path to Optimal Health

Functional nutrition focuses on uncovering what your body needs to thrive by addressing root causes rather than symptoms. If you're overweight, chronically stressed, bloated, or fatigued, consider working with me. Together, we can discover the right diet for your unique chemistry — one that aligns with your body’s needs, nutrient requirements, and food sensitivities. I’ll help you to create a personalised nutrition plan that restores balance, enhances well-being, honours your values, and supports you in living your healthiest, most vibrant life!

www.karius.ch

KATHLEEN KARIUS

FUNCTIONAL NUTRITION

AND WELLBEING