A review of recent research concludes eating red meat may not be as bad as once thought. But not all experts agree.

The studies published in the Annals of Internal Medicine conclude there’s little to no effects from eating meat on illnesses like heart disease, cancer or diabetes. The controversial study also recommends consumers who eat as much as four servings a week can continue to do so.

Those results run counter to long established health guidelines to reduce the consumption of red and processed meats because of their links to cancer and poor cardiovascular health.