He explained that protein - especially from animal sources and in particular from dairy - boosts a growth-promoting hormone that makes cells multiply faster, which is vital early in life but not necessarily later on in life.
"Overly rapid cell multiplication is one of the underlying factors for cancer," Prof Willett said. "It seems pretty clear that we don't want to have our cell-growth accelerator to the floor from the day we're born until the day we die."
Preventive cardiologist Stephen Devries, executive director of the non-profit Gaples Institute for Integrative Cardiology in Deerfield, Illinois, recommended avoiding or eating only minimal amounts of animal protein. He is also cautious about what he called "artificially enhanced protein", such as protein powders.
|Protein from plants are preferred than those from animals|
He recommended getting protein instead from beans, lentils, nuts and tofu. He said: "These are terrific sources of protein and they're the ones we should concentrate on, rather than the artificial sources, whether they come from animals or plants."
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