Are We Really That Different? Surprising Universal Genetic Similarities Across Populations

Most of us have, at some point or another, marveled at our family trees or spit into tiny plastic tubes, eager for an ancestry surprise and maybe evidence of that rumored great-great-Swedish-grandmother. But for all the excitement about where our families come from, when it comes to our functional genetics — the DNA that influences how we actually live, eat, and move — the real surprises are just how much we all have in common. Let’s dig into the fascinating world of universal genetic variations and see why, when it comes to function, humans are shockingly similar.

Universal Genetic Variations Across Populations

You might think that our genes, much like our passports, would reflect dramatic differences based on our place of origin. After years of reviewing hundreds of DNA results from people across Australia, Italy, Sweden, Russia, the United Kingdom, India, and beyond, the evidence points the other way entirely.

“I did 400 genetic reviews in which I compared the genetics of people who are from different parts of the world… What’s been amazing to me is to find that there are significant similarities, I’m just going to call them, amongst all of humankind. And this was a shock to me. I really expected something different.”

Why is this so? Modern DNA testing done for health and wellness purposes focuses on functional genes, not just ancestry. These are the genes that determine everyday functions like your capacity to absorb B vitamins, metabolize fats, handle protein, and react to exercise. And across the board, these traits don’t divide along ancestral lines nearly as much as most of us might expect.

Functional Genetics vs. Ancestry DNA

First, it helps to clarify the difference between the types of genetics at play:

• Ancestry Genetics: Tells you about your family tree and deep roots — who contributed to your DNA over generations and where they lived.
• Functional Genetics: Addresses how your current set of genes affects day-to-day life — how you process food, absorb nutrients, respond to exercise, and more.

The universal genetic variations found by researchers and health professionals relate to that second category, and what’s eye-opening is that our similarities far outweigh our differences.

Surprising Similarities Worldwide

Let’s unpack some of the specific findings that defy the myth of dramatic difference.

1. The Vitamin B Paradox

“The first one is how we handle B vitamins. It’s almost universal when I look at people’s genetics, they’re going to have some degree in their B vitamins in which they’re inefficient… It could be all of them, quite likely it’s more than one. And that was a surprise to me that it was so ubiquitous that our ability to use B vitamins.”

No matter where you’re from, metabolic inefficiencies with B vitamins—B12, B9 (folate), B6, B2—are almost the rule, not the exception. These vitamins run the body’s energy production line. In practical terms, this means most of the human population is operating on a similar playing field when it comes to creating and using cellular energy, and most of us need to pay particular attention to our intake and supplementation.

2. Macronutrient Metabolism: Fats, Carbs, and Protein

• Fat Handling: “Our fat genes, however, are almost all universally… weakened compared to what we would consider 100% normal. That was a surprise to me. So we don’t have a great ability to handle fat in food as a general rule.”
• Carbohydrate Variation: Peoples’ response to carbohydrates varies — but still, not according to ancestry lines. Variance happens, but it isn’t consistently linked to geography or ethnicity.
• Protein Utilization: “The one that’s really the most surprising though, is the ability to handle protein… it’s very, very common that people’s ability to utilize protein is something that’s compromised.”

These are not regional quirks, but near-universal traits. The implication? Our bodies are more alike than different when it comes to the big nutrition levers.

3. The Collagen Connection

When it comes to protein, collagen is a superstar — forming skin, ligaments, tendons, and even supporting structures within the brain. The ability to properly utilize and synthesize protein, especially as we age, is an almost universal challenge. This isn’t about being northern European or South Asian — it’s a shared human dilemma.

4. Omega-3 Metabolism

“The second thing that I found universally is people have an inability to actually metabolize and utilize omega-3 fatty acids. Fish oils is what they’re usually known as, although there are vegan omega-3 fatty acids… But this is another universal problem. The lack of this is one of the contributors to cardiovascular disease and diabetes.”

Whether you’re from Japan or California, our struggle to maintain adequate omega-3 fatty acid status is nearly a human constant. And yet again, the solution is universal: more attention to dietary sources or targeted supplementation.

Misconceptions About Genetic Differences

Why Do We Think We’re So Different?

Our fascination with ancestry is understandable. After all, who doesn’t love a good family mystery? However, cultural habits, food traditions, and lifestyle play a much bigger role in shaping health outcomes than these subtle, often misunderstood, genetic variations.

“Their lifestyles were different, but when it came down to the genetics… there are some variations in genetics that are very common amongst all of us.”

Much of the myth of radical difference stems from visible traits (like skin, hair color, or body type) that are simple to notice but not indicative of deeper metabolic processes. These functional genes — how we turn lunch into energy, absorb nutrients, or build muscle — belong to the human collective, not just your ancestral village.

Universal Solutions for Universal Genes

The take-home message from all this genetic detective work is both comforting and empowering:

• Most of us need to watch our protein intake, especially as we age, regardless of background.
• We all benefit from focusing on B vitamin intake (diet or supplementation).
• The average human would do well to pay attention to omega-3s, whether you’re eating salmon or flaxseed oil.
• How we handle carbs and fats isn’t dictated by ancestry, but by individual and universal variations.

Conclusion: Embracing Our Shared DNA

So, are we really that different? When the lens zooms in on functional genetics — not where our ancestors lived, but how we live now — the answer is a resounding no. Our differences are routinely overestimated; what truly unites us as humans is that our daily challenges and nutritional requirements are shockingly consistent. We’re built on the same molecular blueprints, whether we hail from Sweden, India, Italy, or Australia.

The next time you make breakfast or reach for a supplement, remember: you’re not just eating for your own unique DNA quirks — you’re addressing the universal needs that connect all of us. Our genes may carry stories from every corner of the world, but it’s the common chapters that matter most for your health.

Curious about your own universal genetic variations? Start with a functional DNA test focused on nutrition and metabolism — and embrace the insights that unite us all, whoever you are and wherever you come from. If you’d like help interpreting your results or figuring out the next steps for your wellness journey, reach out to us at LiveYourDNA.com. Let’s celebrate what we share and use that knowledge to thrive, together.