Before something like this would be possible, we would need a general concept of "a nutritious diet for the average human" that wasn't blatantly flawed to then modify based on individual traits.
As is, the field of nutrition is a pseudo-scientific mess that keeps "building" on theories that were never supported by data, but will never be rejected with the current methodology. To start, we should perform a bayesian re-analysis of every major hypothesis in the field of nutrition using the data we already have and then take the actual results seriously. Even if it suggests "outrageous" things that everybody "knows" is wrong like saturated fat is perfectly safe, or whole grains and vegetable oil are unhealthy (and it will).
We also have to realize that good nutrition choices with our current data are simply "prudent risk adverse decisions" based on inference from very weak data. We don't have to know if X is good or bad for you and why to make a decision to eat it or not with the data we do have.
The most pressing need in human health right now is a Bayesian revolution in the field of nutrition.
I stumbled on this project during my research: food4me.org
The complete mapping of the human genome sequence in 2000 introduced the possibility of individualised medicine, including personalised nutrition. During this time the field of “nutrigenomics” emerged, which examines the relationship between food and gene expression. Many were hopeful about the ability to plan diet recommendations based on an individual’s genetic profile.
However, the promise of personalised nutrition has failed to develop as a commercial service, and matching dietary advice to genetic profiles has proven difficult. Some companies offer genetic mapping and health reports, but these services are often based on inaccurate information.
There is a need to comprehensively analyse the opportunities and challenges in the field of personalised nutrition. In addition, the fundamental question remains, “how can we best use our current understanding of food, genes, and physical traits to design healthier diets tailored for each individual?”
To address these concerns, Food4Me has gathered an international group of experts to survey the current knowledge of personalised nutrition, and to explore the application of individualised nutrition advice. The Food4Me project will also investigate consumer attitudes and produce new scientific tools for implementation.