Why your best friend thrives on keto and you don’t. A friend starts a new “miracle” protocol – maybe it’s strict keto, carnivore or raw veganism. And within two weeks, they look radiant, their brain fog has lifted, and they’re shouting from the digital rooftops.
Naturally, you try it. But instead of the promised limitless energy, you feel sluggish, irritable and hit a plateau before you even start.
What gives? Is your willpower broken? Is the diet a scam?
Usually, the answer is neither. The answer is bio-individuality.
What is bio-individuality?
Bio-individuality is the nutritional equivalent of a fingerprint. It’s the idea that your specific genetic makeup, gut microbiome, stress levels and activity history create a unique set of operating instructions for your body.
In a world obsessed with the best way to eat, we often forget that your body is a laboratory, not a calculator.
The three factors that break the rules
1. The microbiome factor Your gut is home to trillions of bacteria that help break down your food. If your best friend has a robust population of bacteria that thrives on complex fats, they’ll feel like a superhero on keto. If your microbiome is currently geared towards fibre and carbohydrates, a sudden switch to high fat might leave you feeling bloated and exhausted.
2. The stress load (cortisol) If you are in a high-stress season of life, your body is likely pumping the brakes on certain metabolic processes. While your friend might thrive on intermittent fasting (as I’ve discussed in my blog Why I Skip Breakfast Now), that same fasting window might be perceived as an additional stressor to your nervous system, causing your body to hold onto weight for safety.
3. Genetic heritage Our ancestors ate what was available to them. Some of us come from lineages that evolved on high-protein sea life; others come from cultures centred around grains and tubers. Your DNA carries a memory of what fuel works best.
How to find your own middle ground
If the one-size-fits-all approach is a myth, how do you actually feed yourself? It starts with moving from external rules to internal cues.
The post-meal check-in: Forget the calories for a second. Two hours after you eat, how do you feel? Are you energised or ready for a nap? Is your brain sharp or fuzzy? Your body is giving you real-time data so start listening.
Stop the diet identity trap: You don’t have to be a keto person or a vegan. You can be a person who eats mostly plants but enjoys a steak when they feel run down. You are allowed to be a nutritional hybrid.
The 80/20 test: Find the core 80% of foods that make you feel objectively good. Use the remaining 20% to experiment with those trending ideas without letting them wreck your foundation.
From the best diet to your best life
Nutrition should be a tool that supports your life, not a second full-time job. When you embrace bio-individuality, the shame of failing a diet disappears. You didn’t fail the diet; the diet simply wasn’t designed for your specific biology.
Think back to a time you felt your absolute best – vibrant, clear-headed and strong. What were you eating then? Ignore the current trends and write down three patterns from that high-energy season.
Stop guessing, start testing
We can spend years through trial and error trying to listen to our gut, or we can look at the actual blueprint our bodies came with.
If you’re tired of the diet musical chairs and want to know exactly how your body processes carbs, fats and specific nutrients based on your unique genetic makeup, I highly recommend getting a DNA test. It’s the ultimate shortcut to understanding your bio-individuality.
Ready to unlock your genetic blueprint? Check out CircleDNA here to get your comprehensive health report.