How cutting meat and fat could reverse aging in older adults

A new study suggests that older adults can improve their health by adjusting a typical 'Western' diet. The research found that reducing meat and saturated fat intake may slow down aging processes at a cellular level. Participants showed measurable gains in functional tests and a metric called 'biological age'. The study divided participants into four groups, each following a different meal plan. Diet 1 closely resembled a standard 'Western' diet, with 14% protein, 40% fat, and 40% carbohydrates, and half its protein came from animal sources.

Diet 2 reduced fat intake to 30% and increased carbohydrates to 50%, using whole grains and vegetables. Diet 3 and Diet 4 contained less meat and varied in fat and carbohydrate content. These two diets showed the most significant improvements in 'biological age' compared to Diet 1.

All four groups lost similar amounts of weight, averaging about 1.8 kilograms, with around 1.4 kilograms of that being fat. The study also noted slight health benefits from increasing vegetable intake and cutting saturated fats. The findings indicate that older adults do not need to eat large amounts of meat to maintain muscle and strength. Replacing some meat with plant-based proteins led to better functional measures, clinical test results, and a reduced 'biological age'. This suggests that dietary adjustments can support healthier aging without requiring drastic changes.