The Longevity Diet: what is it & what are the benefits?

By Prolon | Feb 27, 2026

Longevity Diet: What Is It & What Are the Benefits?

What is the Longevity Diet?

Rooted in more than 25 years of research, the Longevity Diet was developed by renowned longevity scientist Dr. Valter Longo. Through decades of studying aging and long-lived populations around the world (longevity zones), his research identified common dietary patterns shared by communities with the highest amount of people living well into their hundreds.

How does the Longevity Diet work?

The Longevity Diet works by focusing on certain foods while avoiding others. For example, contrary to what is popularly hailed as the “holy grail” of the macronutrient world, protein is actually a smaller part of the Longevity Diet — a shock to most people in our high-protein society. In fact, in his research, Dr. Longo discovered that a high protein diet (specifically from animal sources) was actually associated with the stimulation of growth hormone pathways TOR and IGF-1, which can accelerate the aging process.

What to eat

The Longevity Diet emphasizes mostly plant-based eating, centered on vegetables, leafy greens, whole grains, legumes, and beans. Protein comes primarily from plant sources—such as chickpeas, lentils, nuts, and beans—with fish consumed in moderation (about 2–3 times per week), prioritizing varieties lower in mercury. However, for those over 65 starting to lose muscle mass, strength, or weight, it is suggested to increase protein intake from animal-based foods like fish, eggs, cheese, and yogurt made from sheep’s or goat’s milk. Extra virgin olive oil, rich in heart-healthy monounsaturated fats, is the recommended primary cooking fat.

The quality and nutrient value of the carbohydrate foods consumed (legumes, lentils, whole grain, and fruit) are superior to the low-quality carb choices you may be most familiar with (like processed foods, snacks, and fried food).

What to avoid

The Longevity Diet encourages limiting red meat and poultry, and saturated fat. It is also important to avoid added sugar, a major culprit in the onset of chronic Western diseases like obesity, diabetes, heart disease, cancer, and more. To keep growth factors low between the ages of 18-65, the Longevity Diet recommends keeping your protein consumption to between 0.31 and 0.36 grams of protein per pound of body weight per day. For example, if you are a 150-pound person, your protein intake would range from 47g to 55g a day.

Fasting is key

Reduced calorie intake and periodic fasting are common patterns observed in many long-lived populations. Research on centenarian lifestyles suggests that prolonged fasting periods may contribute to longevity, in part by supporting autophagy — the body’s natural system for cellular repair and recycling.

Prolonged fasting, typically lasting around 72 hours or more, is associated with triggering the deep cellular rejuvenation. However, extended water-only fasting comes wiht many challenges and risks. To address this, Dr. Longo developed the Fasting Mimicking Diet (FMD) — a scientifically designed, plant-based program formulated to mimic the biological effects of prolonged fasting while still providing carefully calibrated nourishment. Prolon’s FMD is the only nutrition program clinically shown to activate autophagy in humans.

Because prolonged fasting is recommended only periodically (a few times per year), the Longevity Diet also incorporates Time-Restricted Eating (TRE), the most common form of intermittent fasting. TRE involves limiting food intake to a consistent daily window, such as a 12:12 pattern aligned with circadian rhythms, giving the body a daily break from constant intake. This approach has been associated with support for metabolic health and healthy weight management, among others.

What are the potential benefits of the Longevity Diet?

Supports healthspan

It’s one thing to live to an older age, and it’s a different thing to live healthier, and feel better, for longer - a concept known as healthspan. The goal is not just advancing the clock or the calendar by another year but rather supporting health and wellness as the years goThe Longevity Diet supports both lifespan and healthspan, as evidenced by the long-lived populations whose dietary patterns informed its design.

Supports overall metabolic health

Metabolic health is your body’s ability to properly use and regulate energy from food. As we age, the risk of metabolic syndrome — a cluster of conditions like high blood sugar, excess abdominal fat, abnormal cholesterol, and elevated blood pressure — increases.

Protein, and specifically certain amino acids found in higher amounts in animal protein, can strongly activate growth pathways such as mTOR and IGF-1. When chronically overstimulated, these pathways may contribute to insulin resistance and metabolic dysfunction. The Longevity Diet moderates these amino acids by emphasizing plant-based proteins and moderate overall intake — helping support metabolic balance and long-term health.

Supports healthy cardiovascular function

It’s no secret that diet directly influences our cardiovascular health and plays a role in reducing or increasing our risk of developing cardiovascular complications. Processed meats, added sugar, and some saturated fats are all known to influence a person’s heart health negatively. The Longevity Diet limits and/or completely eliminates these foods and focuses instead on heart-healthy foods like whole grains, healthy fats, plenty of vegetables, and omega-3-rich fish.

How can nutrition affect your longevity?

The nutrient components that make up foods recommended in the Longevity Diet are directly linked to our body’s functions, helping to support longevity. Fruits and vegetables are rich in certain vitamins and minerals that directly support immune function. Olive oil contains monounsaturated fats and antioxidants, which can be linked to a healthy heart. Legumes, nuts, and seeds contain protein, which is essential to maintain muscle mass.

The bottom line

Longevity and nutrition are deeply connected, and the foods you choose play a powerful role in supporting overall wellness and key health markers. The Longevity Diet offers a sustainable, flexible approach to eating — and fasting — built on simple, practical steps. Prolon’s products are rooted in these evidence-based principles, bringing the science of longevity into everyday practice.

Want to learn more? Download our Longevity Lifestyle e-book for a practical guide to living the principles, along with Longevity Diet recipes.

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