Nutrigenomics: What It Is and How SNP Nucleotides Define the Nutrigenetic Profile
Pablo Estelles / 9 March 2026
Nutrigenomics: What It Is and How SNP Nucleotides Define the Nutrigenetic Profile
How can genetic data be integrated into dietetic practice? In this article, we explain what nutrigenomics is and show how nucleotides make it possible to define a solid nutrigenetic profile. Based on that foundation, we outline an approach to translating genetic information into personalised recommendations aligned with the principles of precision nutrition.
Nutrigenomics: what it is
Nutrigenomics studies how nutrients and bioactive compounds modulate gene expression and metabolic pathways. Its aim is to translate this diet-gene interaction into personalised and measurable dietary recommendations.
Differences between nutrigenomics and nutrigenetics
Nutrigenomics: how diet influences gene expression and biological pathways.
Nutrigenetics: how genetic variants (e.g., SNP nucleotide) condition the individual response to nutrients.
Both disciplines are complementary: nutrigenetics identifies susceptibility (which variants a person has), and nutrigenomics helps modulate the response through dietary and lifestyle changes.
Both are complementary: nutrigenetics profiles susceptibility, and nutrigenomics proposes dietary (and lifestyle) modulations to optimise the response. Recent studies insist on considering polygenicity, effect size and gene-diet-environment interactions.
Nutrigenomics test
A rigorous approach usually includes:
SNP nucleotide panel supported by scientific evidence (folate/B12 methylation, vitamin D metabolism, lipids, caffeine/lactose, inflammation, antioxidants, detoxification).
Evidence-based interpretation: effect size, quality/replication of studies, possible interaction with microbiota and lifestyle, and degree of recommendation. Reviews highlight that, despite the volume of associations, clinical translation requires caution, independent validation and monitoring of clinical endpoints.
Component
What it includes
SNP nucleotide panel
folate/B12 methylation, vitamin D metabolism, lipids, caffeine/lactose, inflammation, antioxidants, detoxification
Phenotypic matrix
analytical parameters, habits and objective (weight, performance, cardiometabolic risk)
Evidence-based interpretation
effect size, quality/replication of studies, possible interaction with microbiota and lifestyle, and degree of recommendation; caution, independent validation and monitoring of clinical endpoints
SNP nucleotide: How to establish a nutrigenetic profile
Panel selection: prioritise SNPs with clinical utility and replicated evidence in the target of interest (e.g., lipids, blood pressure, vitamin metabolism).
Sampling and genotyping: saliva/blood, quality control and coverage; document technical limitations.
Multi-source integration: combine genotype with biomarkers (e.g., 25(OH)D, lipid profile), dietary records and lifestyle factors; where appropriate, consider microbiota/metabolomics.
Practical translation: adjust macros (quality of fats and carbohydrates), micronutrients (active forms and doses), bioactives (e.g., polyphenols, caffeine according to metabolism) and behaviours (sleep, activity) that modulate pathways affected by SNPs.
Follow-up and reassessment: define indicators (biomarkers and clinical outcomes) and review the plan in the event of changes in objective or new evidence.
Importance in precision nutrition
Precision nutrition seeks to define personalised dietary strategies to correct metabolic imbalances and improve quality of life, integrating knowledge of the intestinal microbiome, the functioning of the microbiota and the genetic information of each person. This approach makes it possible to understand with greater granularity how diet impacts the body and to design guidelines tailored to the individual, rather than average recommendations.
The integration of nutrigenomics and SNPs makes it possible to move from general recommendations to targeted and measurable interventions. These are some of the benefits:
Greater clinical response: prioritisation of targets (methylation, inflammation, lipids) with fine-tuned adjustments.
Personalised prevention: early detection of susceptibilities and protective dietary modifications.
Clear risk communication: reports with understandable language, limits and realistic expectations
In practice, precision nutrition integrates multiple dimensionsof the individual (lifestyle, genetics, microbiota, metabolic response) to select targets and measure outcomes objectively, which strengthens clinical translation and adherence to the guideline.
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