L-Nutra, a global leader in nutrition technology and longevity science, is once again redefining what precision nutrition can do with the launch of the Prolon® L-Protein Bar — a clean, plant-based bar scientifically formulated to provide the perfect balance of amino acids from plant-based sources to support both muscle health and healthy aging, not just workouts.
Most protein products today are focused on quantity — more grams, more calories, more bulk. But emerging longevity science shows that too much of the wrong kind of protein can accelerate aging by overstimulating key growth pathways like IGF-1 and mTOR. On the other hand, too little protein — especially in strict vegan diets — may fail to adequately support muscle maintenance and overall strength.
Achieving this balance is critical: while excessive protein, particularly from animal sources, may overstimulate pro-aging pathways, too little protein can undermine strength, energy, and overall resilience. The L-Protein Bar is carefully designed to navigate this middle path — delivering the right nutrients, in the right amounts, from the right sources. Now part of the Prolon suite of clinically informed nutrition tools, the L-Protein Bar continues L-Nutra’s mission to create smarter everyday nutrition solutions rooted in more than two decades of research.
“If you want to live a long and healthy life, you need to slow the rate of aging every day — and that starts with what you eat,” says Dr. Joseph Antoun, a Harvard- and Johns Hopkins-trained physician and CEO of L-Nutra. “Protein can accelerate aging if you're choosing the wrong types or the wrong amounts. Our novel L-Protein Bar, rooted in more than 25 years of longevity science, strikes the optimal balance: enough to support muscle strength, but not so much that it speeds up the aging process. And unlike most protein products, there are no hidden ingredients. We pride ourselves on quality ingredients and transparency in how we make our products."
A Protein Bar Built for the Future of Health
Formulated by scientists at the USC Longevity Institute, the Prolon L-Protein Bar includes a diverse blend of plant-based proteins (from black beans, chickpeas, and peas) and is fortified with L-methionine, an essential amino acid typically low or missing in vegan diets and other vegan protein supplements. This targeted formulation is designed to maintain a balanced growth factor response while delivering complete protein support for muscle and tissue health.
Each bar contains 14 grams of protein, only 170 calories, and is made without added sugars, sugar alcohols, or artificial sweeteners. Instead, it’s naturally sweetened with whole dates for a rich flavor and more balanced glycemic response.
How Our Protein Bar Redefines the Standard
- Clinically Inspired Nutrition: Formulated to avoid overstimulation of nutrient-sensing pathways associated with accelerated aging, such as IGF-1 and mTOR.
- Complete Plant-Based Protein: A targeted blend of black beans, chickpeas, and pea protein — fortified with L-methionine to deliver a full essential amino acid profile.
- Blood Sugar Conscious: Naturally sweetened with whole dates, a low-glycemic fruit. No added sugars, sugar alcohols, or artificial sweeteners.
- High Protein Density: 14 grams of plant proteins per 170 calories — more protein per calorie than most leading bars.
- Clean, Thoughtful Ingredients: Gluten-free, soy-free, dairy-free, non-GMO, and made with heart-healthy fats from extra virgin olive oil and cocoa butter.
The bar launches in its first flavor, Chocolate Coated, featuring a 100% dark chocolate layer and a rich, satisfying taste. Additional flavors are planned as part of Prolon’s expanding Longevity Nutrition platform — a product suite designed to help people integrate clinically-backed, health-supportive nutrition into daily life.
The Prolon L-Protein Bar is now available for purchase at ProlonLife.com.
