One type of protein may shorten life: An unexpected warning from experts on longevity

One type of protein could potentially shorten life, according to a recent warning from longevity experts. While many believe that high-protein diets are beneficial for health and longevity, new research suggests that excessive consumption of animal-based proteins might have adverse effects on lifespan and overall well-being.

The issue centers around the overconsumption of animal-derived proteins such as meat, dairy products, and eggs. Experts emphasize that while protein is essential for maintaining muscle mass and supporting bodily functions, particularly as one ages, the type and quantity of protein consumed play a crucial role in determining its impact on health. According to Dr. Susan Ferris, who holds dual certifications in family medicine and anti-aging and regenerative medicine, adequate protein intake becomes increasingly important with age. However, she notes that the common belief that older individuals should reduce their protein intake is not supported by scientific evidence.

A study published in the journal *Nutrients* confirms that older adults require more protein than younger individuals due to natural muscle loss associated with aging. The U.S. Food and Drug Administration recommends approximately 50 grams of protein per day within a 2000-calorie diet. Despite these guidelines, many people consume far more protein than necessary, often favoring animal-based sources over plant-based alternatives.

Research indicates that animal proteins can be harmful due to two specific compounds: advanced glycation end products (AGEs) and trimethylamine N-oxide (TMAO). AGEs form when proteins or fats combine with sugars in the bloodstream, especially during cooking methods like grilling or frying. These compounds accumulate in tissues over time, leading to oxidative stress and inflammation—key factors in cellular aging. They also contribute to chronic diseases such as diabetes, cardiovascular disease, and Alzheimer's.

TMAO, another compound linked to animal proteins, increases the risk of cardiovascular diseases including atherosclerosis, heart attacks, and strokes. It promotes cholesterol buildup in arteries and impairs the body’s ability to eliminate cholesterol, leading to inflammation and damage to the cardiovascular system. This not only affects heart health but also impacts overall cellular function and longevity.

Experts recommend increasing the intake of plant-based proteins and fish, which offer distinct nutritional benefits compared to other animal proteins. Plant-based proteins such as legumes, lentils, nuts, seeds, and soy are rich in antioxidants, fiber, and nutrients that support heart health, reduce inflammation, and lower the risk of chronic diseases. Unlike animal proteins, they contain fewer AGEs and do not promote the formation of TMAO, making them gentler on cells and overall health.

Studies show that diets rich in plant-based proteins can significantly reduce mortality risks related to cardiovascular diseases and other causes. Replacing animal proteins with plant-based alternatives may extend lifespan and improve overall health outcomes.

In addition to dietary considerations, the balance between different types of protein sources is critical. For instance, Greek yogurt and cheese are both high in protein and can aid in weight management. However, each has unique characteristics that influence their effectiveness for weight loss. Greek yogurt contains live cultures that may help regulate appetite and improve gut health, whereas cheese provides slow-digesting casein protein, which supports prolonged satiety and muscle preservation during weight loss.

Ultimately, the choice between these protein sources depends on individual preferences and health goals. Both options are relatively low in calories and high in protein, contributing to feelings of fullness and appetite regulation. However, cheese contains higher levels of sodium, which may affect weight management strategies.

As research continues to evolve, the emphasis remains on balanced nutrition tailored to individual needs. Whether focusing on longevity, weight management, or general health, understanding the nuances of protein consumption is essential for making informed dietary choices.