Nutrigenomics and SNPs: Defining the Nutrigenetic Profile

Nutrigenomics: what it is

Nutrigenomics studies how nutrients and bioactive compounds modulate gene expression and metabolic pathways. Its objective is to translate this dietgene interaction into personalised and measurable dietary recommendations.

Differences between nutrigenomics and nutrigenetics

Nutrigenomics: how diet influences the expression of genes and biological pathways.
Nutrigenetics: how genetic variants (e.g., SNP nucleotide) determine the individual response to nutrients.

Both disciplines are complementary: nutrigenetics identifies susceptibility (which variants the person has), and nutrigenomics helps modulate the response through dietary and lifestyle changes.

Nutrigenomics testing

A rigorous approach usually includes:

A panel of SNP nucleotide with scientific support (folate/B12 methylation, vitamin D metabolism, lipids, caffeine/lactose, inflammation, antioxidants, detoxification).
Phenotypic matrix: lab tests, habits and objective (weight, performance, cardiometabolic risk).
Evidence-based interpretation: effect size, study quality/replication, possible interaction with microbiota and lifestyle, and level of recommendation. Reviews highlight that, despite the volume of associations, clinical translation requires caution, independent validation and follow-up 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 metabolisation) and behaviours (sleep, activity) that modulate pathways affected by SNPs.
Follow-up and re-evaluation: define indicators (biomarkers and clinical outcomes) and review the plan in response to changes in goals 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, microbiota function and each person’s genetic information. 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 SNP 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 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 dimensions of the individual (lifestyle, genetics, microbiota, metabolic response) to select targets and measure outcomes objectively, which strengthens clinical translation and adherence to the plan.