If you have started looking into nutrition tests, you have probably already noticed that there is more than one type. Food intolerance tests. Gut microbiome tests. Blood biomarker tests. DNA tests. Each one comes with its own set of claims and its own way of describing what it can tell you about your body.
It is not immediately obvious what each of these actually measures, which questions each one is designed to answer, or - crucially - what you are supposed to do with the results once you have them.
This guide explains all of it clearly. What each type of nutrition test is, how they differ from each other, and how to work out which one - if any - is the right starting point for you.
A nutrition test is any tool that helps you understand how your body handles food - what it is getting enough of, what it might be missing, and why. The category covers a wide range of approaches, from a simple finger-prick blood test that measures your current vitamin D levels, to a DNA analysis that looks at the genetic variants influencing how your body processes nutrients across its entire lifetime.
What all nutrition tests have in common is a starting premise: that understanding your nutritional picture gives you better information to make food decisions with. But they differ significantly in what they measure, how they measure it, and - most importantly - what you can actually do with what they find.
That last point is the one most worth thinking about before you choose a test. The purpose of any nutrition test is not the result itself. It is the action that follows. A result that sits in an inbox unread, or that leaves you unsure what to change about your diet, has not really helped you. The best nutrition tests are the ones built with that gap in mind.
These four approaches are not competing with each other - they are designed to answer different questions. Understanding what each one measures makes it much easier to work out which is relevant for you.
Food intolerance tests measure your immune system's response to specific foods. The most common form tests for IgG antibodies - proteins produced when your immune system has been exposed to particular food antigens. Elevated IgG levels for a specific food are interpreted as a sign that your body may be reacting to it.
These tests are widely available and relatively affordable. They are best suited to people who suspect that specific foods are causing symptoms - digestive discomfort, bloating, skin issues, or fatigue - and want a starting point for identifying which foods to investigate.
Gut microbiome tests analyse the bacterial composition of your digestive system using a stool sample. They identify the types and relative proportions of microbial species present - and in some cases make recommendations about diet and supplementation based on what they find.
The science linking gut bacterial diversity to digestion, immunity, and even mood is growing and credible. Microbiome testing is best suited to people who want to understand their gut health specifically - particularly those with ongoing digestive symptoms or an interest in the role of fibre and fermented foods in their diet.
Blood biomarker tests measure specific markers in your blood - including vitamins and minerals, cholesterol, blood glucose, and inflammatory markers. They give you a picture of what is actually circulating in your body right now, making them the most direct measure of your current nutritional status.
If your vitamin D is low, a blood test will show it. If your iron is depleted, a blood test will find it. The evidence base is strong and well-established, particularly in professional and elite sports nutrition settings.
DNA nutrition tests analyse specific variants in your genetic code that influence how your body handles food. Unlike the other three approaches, your DNA does not change. You test once and the information does not expire, does not vary with the seasons, and is not affected by what you ate last week.
A DNA nutrition test looks at the genetic variants with the strongest established links to how your body absorbs vitamins and minerals, processes different types of fat, regulates energy from carbohydrates, metabolises caffeine, and responds to dairy. It tells you how your body is built to handle food - not what it is doing right now, but what it is genetically predisposed to do.
Before you decide which type of nutrition test is right for you, there is one question that matters more than any other: what are you going to do with the result?
This sounds obvious. But most people who buy a nutrition test do not ask it. They focus on what the test measures - which vitamins it covers, which genes it analyses, how detailed the report is - without thinking clearly about what they will actually change based on what they find out.
A blood test that tells you your vitamin D is low gives you a number. That number is useful - but only if you know how to act on it. Do you supplement? Change your diet? And if you supplement, how much, and for how long? A food intolerance test that flags a reaction to certain foods gives you a list. But without guidance on what to do next, many people either eliminate foods unnecessarily or ignore the result entirely.
The gap between receiving information and knowing what to do with it is where most nutrition tests fall short. The best nutrition test is not necessarily the one that generates the most data. It is the one that connects what it finds to the food decisions you make every day.
Of the four approaches, DNA nutrition testing is the only one that gives you a stable, permanent biological foundation. Your DNA does not change - which means the insights from a single test remain relevant for life, without needing to be repeated as your blood levels or gut bacteria fluctuate.
This permanence is genuinely useful. It means you are not chasing a moving target. Your genetic profile tells you how your body is built to handle food - not what it is doing right now, but the underlying biological picture that shapes everything else.
For specific areas - how your body absorbs vitamins and minerals, how it processes different types of fat, how it regulates energy from carbohydrates, how it metabolises caffeine, how it handles dairy - the evidence base linking specific genetic variants to nutritional response is now substantial and peer-reviewed. This is not fringe science. It is an established and growing field.
What it is not is complete. Nutrigenetics is still developing, and Boone is honest about that. We focus on the variants where the evidence is strongest and most consistent - and we do not include associations where the science is speculative or premature.
Most DNA nutrition tests give you a report. Boone starts there - and then goes considerably further.
The genetic report covers five areas - glucose and energy regulation, fats and lipid handling, protein preference and quality, vitamins and minerals, and lifestyle factors including caffeine, alcohol, lactose, snacking behaviour, and taste perception. For each area, the app shows your genetic result in plain language, explains what it means, identifies the genes involved, and gives you clear guidance on which foods to prioritise and which to be more mindful of.
But the report is the starting point, not the end point. What makes Boone different is what happens after.
Once you have your results, the Boone app becomes a daily tool that connects your genetic profile to the food you actually eat - not the food you intend to eat, but what is in your kitchen, your shopping basket, and on your plate day to day.
Most nutrition apps track calories and macros. Boone goes deeper - showing you scores across Sleep, Heart health, Brain and mood, Energy, and Immunity, each explained by the specific nutritional reasons behind it. Not a vague wellness rating, but a direct connection between what you have eaten and how well it supports each area of your health - personalised to your genetic profile.
Research consistently shows that dietary variety is one of the strongest indicators of long-term nutritional health. Boone tracks your diet diversity across food groups and colour groups - with a target of 20 different foods across the week - showing you what is missing from your day and which groups to add.
Based on your genetic profile and your actual micro nutrition scores, Boone generates personalised food recommendations - not generic healthy eating advice, but specific foods that address your particular nutritional gaps. Organised into biggest impact foods, worth adding this week, and already working hard for you. Every recommendation can be added directly to a shopping list from within the app.
This is what the answer to 'what do I do now?' actually looks like. A shopping list built around your biology, updated as your diet changes.
The four approaches each answer different questions. Here is a simple guide to which one - or which combination - is most relevant depending on what you are trying to understand.
For most people who are already broadly engaged with their nutrition and want to go deeper - understanding why their body responds to food the way it does, connecting that understanding to their daily diet, and building a long-term picture rather than a snapshot - DNA testing gives you the stable biological foundation that makes everything else more meaningful.
If you want to know what your body is doing right now, a blood biomarker test is the most direct answer. If you are experiencing specific digestive symptoms, a combination of gut microbiome and food intolerance testing may be the more relevant starting point. These approaches are not mutually exclusive - a DNA test combined with a blood test gives you both the biological context and the current picture.
We started this article with a simple idea - a nutrition test is only valuable if it leads somewhere. Information without action is just data.
The four approaches covered here each have genuine value. Blood testing tells you what is happening in your body right now. Microbiome testing tells you about your gut bacterial diversity. Food intolerance testing gives you a starting point for investigating specific reactions. DNA testing tells you how your body is built to handle food - a stable foundation that does not expire.
What separates Boone from every other nutrition test is not the genetic analysis itself - it is what comes after. The food scanner that makes your genetics visible in your shopping basket. The micro nutrition scores that connect what you eat to how your body functions. The diet diversity tracking that shows you what is missing from your day. The personalised food recommendations that tell you exactly what to add - and a shopping list to make it immediate.
