The study conducted in 11 countries found that those who consumed more than 40g of protein per day had a mortality rate of only 18%, compared to 31% for those who consumed less. 

This suggests that older adults who eat more protein, especially from animal sources, have a decreased risk of developing cancer and a higher likelihood of living longer compared to vegetarians.

To ensure optimal health, the study recommends following the "2 more, 1 less" rule for meat consumption after the age of 60. 

1.This means eating more fish, which is easily absorbed and suitable for older adults with poor digestion. Fish also has low fat content and is rich in vitamins A and D, beneficial for calcium supplementation.

It is recommended to consume 40-75g of fish daily or at least three times a week. 

2.Additionally, consuming more chicken is advised, as it is an abundant source of high-quality protein with lower fat content compared to other meats. Chicken can help prevent cardiovascular diseases and high blood pressure.

3.On the other hand, it is important to reduce the consumption of red meat, such as pork, beef, and lamb. Excessive intake of red meat has been associated with an increased risk of colorectal cancer.