What is Personalised Nutrition and Is It Worth It in India
Personalised nutrition is the idea that dietary recommendations should be tailored to individual biology rather than population averages. It is one of the fastest-growing areas in nutrition science and one of the most commercially hyped. Understanding what the science actually supports versus what is marketing helps in deciding whether the investment is worthwhile in the Indian context.
What personalised nutrition is based on
The strongest scientific case for personalised nutrition comes from research on glycaemic response variability. The landmark Weizmann Institute study published in Cell in 2015 found that identical foods produce dramatically different blood sugar responses in different people, driven by differences in gut microbiome composition, genetics, and other factors. This means that generic glycaemic index tables are useful population guides but imperfect predictors for any individual.
Genetics-based nutrition, which analyses variants in genes related to nutrient metabolism, is a growing field. Some genetic variants genuinely affect nutrient needs: certain MTHFR variants affect folate metabolism, APOE variants affect cardiovascular response to dietary fat, and lactase gene variants determine dairy tolerance. These are real differences with real dietary implications.
What the evidence does not yet support
Comprehensive genetic panels that claim to tell you exactly what to eat based on your DNA are significantly ahead of the science. The relationship between most nutritional genetic variants and actual dietary outcomes is complex, contested, and poorly characterised. Most commercial nutrigenomics products oversell the actionability of the data they provide.
Microbiome-based dietary recommendations face similar challenges. While the science of individual microbiome variation is fascinating and clearly relevant, the ability to translate a microbiome analysis into specific, reliable dietary advice remains limited. The field is advancing rapidly but is not yet at the precision that commercial products often imply.
What is worth doing in India now
The most reliable personalised nutrition intervention available to Indians right now is not a commercial test. It is a comprehensive blood panel: ferritin, Vitamin D, B12, HbA1c or fasting insulin, thyroid function, and a lipid panel. These tests reveal actual nutritional status and metabolic function with validated, actionable results. Acting on this data, whether through dietary change or supplementation, is evidence-based personalised nutrition at low cost.
A continuous glucose monitor worn for two weeks provides genuinely personalised data on how your specific body responds to your specific foods. This is the most consumer-accessible form of personalised nutrition insight currently available and is worth the cost for anyone with metabolic concerns or strong interest in optimising their diet.