Every parent knows that feeding a family isn’t simple. One child loves yoghurt but refuses eggs. The other is always hungry after school. A parent may plan balanced meals, only to find that energy, mood, concentration, and growth still vary from child to child.
That is one reason personalised nutrition has become such a popular topic. Rather than assuming one diet works equally well for every person, personalised nutrition looks at how individual biology, lifestyle, age, routine, and food preferences may shape nutritional needs.
For parents, the idea can be helpful, but it also needs careful framing. Personalised nutrition is not about replacing balanced eating, medical care, or common sense. It is about understanding why some people may need slightly different support to reach the same broad goal: a healthy, varied, sustainable way of eating.
What Is Personalised Nutrition?
Personalised nutrition is an approach that uses individual information to guide food and lifestyle choices. This information may include age, activity level, food habits, family history, health goals, nutrient intake, and, in some cases, genetic insights.
Children and adults need a varied diet that includes vegetables, fruit, whole grains, protein foods, healthy fats, and key micronutrients. Public health guidance exists because these foundations are useful for most people.
Personalised nutrition goes a step further. It asks why two people can follow similar eating patterns but respond differently. One person may feel better with regular protein-rich snacks. Another may need more attention to iron-rich foods, vitamin D, omega-3 intake, or folate status. For families, this can make nutrition feel less like a rigid set of rules and more like an informed process.
Why Genetics Has Entered the Conversation
Genes influence how the body makes enzymes, transports nutrients, and manages certain metabolic pathways. This does not mean genes determine everything. Diet, sleep, movement, stress, environment, and routine all play a major role.
However, genetic variation can help explain why nutrient needs and responses aren’t identical. Nutrigenetics, a branch of personalised nutrition, studies how genetic differences may affect the way people respond to nutrients. Nutrigenomics looks at how nutrients may influence gene activity.
For parents interested in this area, at-home wellness tools, such as an MTHFR gene test from Fenix Health, are often explored as part of a broader interest in nutrient metabolism. These tests should be viewed as educational wellness tools, not as diagnostic tests or guarantees of specific outcomes. Any results should be considered alongside diet, symptoms, family history, and professional guidance where appropriate.
Understanding Folate and MTHFR
One of the better-known examples in personalised nutrition is folate metabolism. Folate is a B vitamin needed for normal cell division, red blood cell formation, and maternal tissue growth during pregnancy. Folic acid, the synthetic form of folate, is widely recommended before and during early pregnancy because it has been shown to help reduce the risk of neural tube defects.
The MTHFR gene helps the body produce an enzyme involved in processing folate. Some people carry common MTHFR variants, which may influence how efficiently this pathway works. This is why MTHFR is often discussed in relation to folate, methylfolate, and nutrient metabolism.
Authoritative guidance, including from the CDC, notes that people with MTHFR variants can still process folic acid, and folic acid remains the form shown to reduce neural tube defect risk. For parents, the practical takeaway is not to panic about a gene variant, but to understand that nutrition is nuanced and that supplement decisions should be made carefully.
How Personalised Nutrition Helps Families
Family nutrition can be difficult because every household includes different needs. A pregnant parent, a breastfeeding parent, a toddler, a teenager, and an active adult may all have different nutritional needs.
Children also grow through phases. Appetite can change rapidly. Food preferences can narrow. School routines can affect breakfast and lunch habits. Sport, sleep, screen time, and emotional stress can all influence how well a child eats and feels.
Food First Still Comes First
Despite growing interest in testing and tailored nutrition, food remains the foundation. That means building meals around familiar basics: vegetables, fruit, beans, lentils, eggs, fish, lean meats, dairy or fortified alternatives, whole grains, nuts, seeds, and healthy oils. It also means keeping ultra-processed snacks, sugary drinks, and irregular meals from becoming the default pattern.
The Role of Supplements
Supplements can be useful in specific situations, but they shouldn’t be treated as a shortcut around diet. In the UK, vitamin D supplementation is commonly advised during autumn and winter, and folic acid is recommended before pregnancy and during early pregnancy.
Some families may also consider supplements when dietary intake is limited, food preferences are restrictive, or a qualified professional has identified a possible need. However, more isn’t always better. Fat-soluble vitamins, minerals such as iron, and combined supplement formulas should be used thoughtfully, especially for children.
Gut Health, Lifestyle, and the Bigger Picture
Personalised nutrition isn’t only about genes. The gut microbiome, sleep, physical activity, stress, and daily routine all influence well-being.
The gut microbiome is shaped by diet, especially fibre-rich plant foods such as vegetables, fruit, beans, lentils, whole grains, nuts, and seeds. Family meals that include a variety of plant foods can support digestive health and provide nutrients children need for growth.
A tired child may crave quick energy foods. A parent under stress may rely on caffeine and convenience meals. These patterns are normal, but they show why nutrition advice must fit real life.
The most helpful personalised plan is one that considers the whole household. It should support better choices without creating guilt or unnecessary pressure.
How Parents Can Use Personalised Nutrition Sensibly
The best starting point is observation. Parents can look at appetite, energy, food variety, digestive comfort, concentration, and routine. A simple food and mood diary over a week can sometimes reveal useful patterns.
Next, parents can focus on one change at a time. This might mean adding protein to breakfast, introducing one new vegetable each week, switching to wholegrain options, or planning after-school snacks that reduce reliance on sugary foods.
Testing may have a place for families who want deeper insight, but results shouldn’t be interpreted in isolation. A gene variant is only one piece of information. It doesn’t define a child’s future, and it should not create fear. Used responsibly, personalised nutrition can help families ask better questions and make more informed choices.
Personalised nutrition is changing the way families think about food, but its value lies in balance. The science suggests that individual differences matter, including genetics, lifestyle, age, and routine. At the same time, the fundamentals remain clear: varied meals, enough key nutrients, regular movement, good sleep, and realistic habits are still the foundation of family wellbeing.
For parents, personalised nutrition does not need to be complicated. It can simply mean paying closer attention to what each family member needs, using credible information, and making small, steady changes that fit everyday life.
References
British Medical Journal. (2018). Personalised nutrition and health.
Centers for Disease Control and Prevention. (2025). MTHFR gene variant and folic acid facts.
National Health Service. (2023). Pregnancy vitamins and supplements.
National Institutes of Health, Office of Dietary Supplements. (2024). Folate fact sheet for health professionals.
Journal of the Academy of Nutrition and Dietetics. (2021). Guiding global best practice in personalised nutrition based on genetics.
Monica Costa founded London Mums in September 2006 after her son Diego’s birth together with a group of mothers who felt the need of meeting up regularly to share the challenges and joys of motherhood in metropolitan and multicultural London. London Mums is the FREE and independent peer support group for mums and mumpreneurs based in London https://www.londonmumsmagazine.com and you can connect on Twitter @londonmums
