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Should you let your genes decide what you eat? The field of nutrigenomics certainly leans in that direction. Frustratingly, there are two sides to nutrigenomics. On the one hand, it is a research endeavour trying to shed light on the interactions between the food we eat and the molecules in our body. On the other hand, it is a commercial endeavour piggybacking on the public’s fascination with DNA and the personalization of care. Is it worth the hype? Everything everywhere all at once Genes can influence how we process food. You may have seen food labels stating that the product “contains phenylalanine.” Phenylalanine is one of the many building blocks of proteins, but people with a disease called PKU (phenylketonuria) have a mutation in a gene that results in an ineffective enzyme. They can’t process the phenylalanine they get from food. It accumulates and can lead to irreversible intellectual disability. To avoid this, they must adhere to a special diet that restricts their in

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