For a price -- ranging from under $100 to $1000 -- personalized diets offer nutrition advice customized for your body, some promising weight loss, others focusing on specific conditions like blood sugar control. Can they actually help?
as well as sleep patterns, activity levels, and gut bacteria. Using that data, they began to create a model to predict how anyone might respond to a particular food, based on their own microbiome and DNA.
These discoveries go against conventional advice like the federal Dietary Guidelines for Americans and most popular diet plans. Instead of broad rules about food groups, the results suggest that each of us could be eating foods to support the specifics of our own bodies. Still, even if evidence mounts that personalized diets significantly help people identify “ideal” foods, those who eat a well-balanced diet have also been found to have improved health, decreased diabetes, heart disease, etc.
“We believe the microbiome plays a role, because out of all the things we measured in identical twins, what differed most were the microbial species and what they did,” says Spector. “The other differences that aren’t due to genes or microbes, we’re still trying to tease apart.” Topol agrees. “There isn't anything proven yet with DNA. So let's be clear about that,” he says. “The only real breakthrough in recent years has been capturing all of a person's data, including their gut microbiome data.”Differing approaches to the kind of testing and the data being collected led to advice that can be hard to follow.
“What we don’t know is whether we should live our lives like this. Should we radically change our diets to avoid glucose spikes? It’s intuitive that we wouldn’t want to have them, but we need more proof that this will make a difference,” says Topol., aims to expand the database by collecting data from at-home volunteers in the United States.
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