How Diets Really Work

The New Era Of Personalised Nutrition: Why One-Size-Fits-All Diets Are Obsolete


In today’s fast-paced world, it’s easy to get caught up in the whirlwind of diet trends and fads. You’ve probably heard about Paleo, intermittent fasting, keto, or countless other diets promising miraculous results. But here’s a revolutionary concept: what if the best diet isn’t a specific diet at all, but rather a personalised approach tailored just for you?

As a nutrition expert, I’m not here to advocate for any single dietary approach. Instead, I’m championing the idea of personalisation. Why? Because nutrition isn’t a one-size-fits-all deal. It’s as unique as your fingerprint, and it’s time we treated it that way.

The Pitfalls of Generic Diets

Every day, groundbreaking research reinforces what many health professionals have suspected for years: personalised nutrition is the key to unlocking your full potential whilst achieving your health and fitness goals. This begs the question: is there a single “right way” to eat for everyone? The answer, quite simply, is no.

Our diverse backgrounds, unique DNA, ever-changing environments, and personal preferences make it virtually impossible to prescribe a universal diet that works for everyone. This explains why so many people struggle with body composition and health issues despite following generic advice.

The Complexity of Individual Nutrition

Personal nutrition isn’t just about jumping on the latest diet bandwagon. It’s about considering a whole host of factors that make you uniquely you. Let’s dive deeper into these crucial elements:

  1. Ethnic Origin: Your heritage can significantly impact how your body processes different foods. For instance, individuals of East Asian descent may have a higher likelihood of lactose intolerance, whilst those of Northern European ancestry might have a genetic adaptation for dairy digestion.
  2. DNA: Your genetic makeup plays a pivotal role in how your body responds to specific nutrients. Some people might have genetic variants that affect their ability to metabolise certain vitamins or minerals, requiring personalised supplementation strategies.
  3. Current Environment: Where you live affects not only the availability of certain foods but also your lifestyle. Someone living in a coastal Mediterranean town will have different dietary options and habits compared to someone in a landlocked, urban environment.
  4. Time of Year: Seasonal variations can influence your nutritional needs. For example, you might require more vitamin D supplementation during winter months in northern latitudes due to reduced sunlight exposure.
  5. Location: Urban or rural living can significantly impact food choices and access. Urban dwellers might have easier access to a variety of international cuisines, whilst rural residents might have better access to fresh, local produce.
  6. Stress Levels: Chronic stress can wreak havoc on your appetite and food choices. It can lead to emotional eating, cravings for high-calorie comfort foods, and even impact nutrient absorption.
  7. Toxicity Status: Environmental toxins can influence your health and how your body processes nutrients. Living in an area with high pollution levels might necessitate a diet rich in antioxidants to combat oxidative stress.
  8. Lifestyle: Your daily routine and activity level matter immensely. An office worker with a sedentary job will have different nutritional needs compared to a construction worker or an athlete.
  9. Likes/Dislikes: Your taste preferences shape your diet more than you might realise. A nutrition plan that includes foods you enjoy is more likely to be sustainable in the long term.
  10. Personal Preferences: Beyond taste, your dietary choices might be influenced by ethical considerations (like veganism) or religious beliefs (such as kosher or halal diets).

The Tribal Nature of Eating

When someone asks about your “eating type,” whether it’s Paleo, vegan, or anything else, it’s important to remember that eating is inherently a tribal activity. We’re social creatures who want to belong to something, to identify with a group. However, don’t let this desire for belonging blind you to the bigger picture: the need for personalisation.

Why Popular Diets Often Fall Short

Popular diets often fail to deliver long-term results because they don’t cater to individual needs. They might work to some extent because they help you achieve a calorie deficit or surplus, which is the fundamental principle of weight management. It’s a simple equation: eat more than you need, gain weight; eat less, lose weight. There’s no magic involved, just the basic principle of calories in versus calories out.

For instance, cutting out certain foods, like processed ones in a Paleo diet, often leads to reduced hunger and fewer calories consumed. But remember, it all boils down to calories at the end of the day.

The Benefits of Modern Diet Approaches

Whilst no single diet works for everyone, many modern dietary approaches do offer valuable insights and benefits:

  1. Improved Food Quality: Some diets focus on enhancing overall food quality. The Ketogenic diet, for example, eliminates most carbs to promote weight loss and potentially improve certain health markers. Others, like the Paleo diet, emphasise nutrient-dense whole foods. This approach helps with weight control, leaves you feeling fuller for longer, reduces overeating, and ensures you’re getting essential nutrients.
  2. Micronutrient Focus: Don’t forget about micronutrients – the vitamins and minerals that are crucial for optimal health. Many modern diets emphasise whole, single-ingredient foods, ensuring you get enough fruits and vegetables, which are the primary sources of these vital micronutrients.
  3. Nutrient Timing and Meal Frequency: Modern nutrition also considers when you eat, not just what you eat. Intermittent fasting, for instance, guides you on when to eat to potentially optimise your diet’s efficacy. The concept of the post-workout “anabolic window” is another example. It’s a period when your body is primed to absorb nutrients like carbohydrates and protein, potentially enhancing muscle recovery and growth.
  4. Supplementation: Supplements can also be part of a modern nutrition plan, but it’s crucial to approach them with caution. Always check for quality and safety. Ensure they meet recommended standards and comply with organisations like WADA (for athletes) or the MHRA (for everyday adults in the UK).

The Nutrition Pyramid

A Holistic Approach To better understand how different diets work, let’s break it down into a simple pyramid:

Level 1: Manipulating Body Composition This is the foundation of most modern diets. They help you control your weight by managing calorie intake and expenditure.

Levels 2-5: The Extra Mile Some diets go beyond just body composition and aim to enhance overall health, performance, and micronutrient intake. The more levels a diet addresses, the better your potential results.

When you see success stories from different diets, understand that they’re manipulating one or more of these categories in their own unique way.

Choosing the Right Nutrition Plan

Beyond aesthetics when selecting the right nutrition plan for you, it’s crucial to think beyond just physical appearance. Consider how it affects your energy levels, overall wellbeing, sleep quality, and relationship with food. A holistic approach is more likely to bring better, long-term results.

Whilst improved body composition is a common goal, don’t forget about health and performance. Your health directly impacts your appearance, and your nutrition should help you perform at your best in every aspect of life – whether that’s in the gym, at work, or in your personal relationships.

The Three Pillars of Nutritional Success

To ensure your nutrition plan is working for you, continually monitor these three factors:

  1. Body Composition: Are you moving towards your ideal weight and body fat percentage?
  2. Health: Are your energy levels, sleep quality, and overall wellbeing improving?
  3. Performance: Are you able to perform better in your daily activities, work, and exercise routines?

If any of these factors start to decline, it might be a sign that your current nutrition plan isn’t the right fit for you.

The Importance of Flexibility and Adaptation

Remember, your nutritional needs aren’t static. They can change based on various factors such as age, activity level, health status, and even life events. What works for you today might not be ideal a year from now. That’s why it’s crucial to regularly reassess your nutrition plan and make adjustments as needed.

Practical Steps to Personalise Your Nutrition

  1. Keep a Food Diary: Start by tracking what you eat for a few weeks. This can help you identify patterns, potential nutrient deficiencies, and areas for improvement.
  2. Get a Health Check-up: Regular health check-ups, including blood tests, can provide valuable insights into your nutritional status and overall health.
  3. Consider Genetic Testing: Whilst not necessary for everyone, genetic testing can offer insights into how your body might respond to different nutrients.
  4. Work with a Nutritionist: A qualified nutritionist can help you interpret your health data and create a personalised nutrition plan.
  5. Experiment and Listen to Your Body: Try different approaches and pay close attention to how your body responds. Your energy levels, digestion, and overall wellbeing can provide valuable feedback.
  6. Stay Informed: Keep up with the latest nutritional research, but always approach new information critically.

The Role of Technology in Personalised Nutrition

Advancements in technology are making personalised nutrition more accessible than ever. From smartphone apps that track your nutrient intake to wearable devices that monitor your metabolism, these tools can provide valuable data to help you fine-tune your nutrition plan.


Your unique nutritional journey to the perfect diet isn’t about following a trend or jumping on the latest bandwagon. It’s about matching the correct nutritional protocols to your unique needs, preferences, and goals. By taking a personalised approach to nutrition, you can unlock the full potential of your body and health.

Remember, nutrition is a journey, not a destination. Be patient with yourself, stay curious, and don’t be afraid to adjust your approach as you learn more about your body’s unique needs. With time and attention, you’ll discover the nutritional strategy that works best for you, leading to improved health, better performance, and a more balanced relationship with food.

In the end, the most effective diet is one that you can stick to long-term, that makes you feel good, and that supports your overall health and life goals. Embrace the power of personalised nutrition, and embark on your journey to optimal health and wellbeing.

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