The L-Nutra Story: From longevity research to real-world results.

L-Nutra began with a bold vision: To transform what can be achieved through nutrition and longevity science. The company’s first innovation was Prolon—a 5-day nutrition program based on decades of research into fasting and cellular rejuvenation.

As the science advanced, so did the mission. Today, L-Nutra has evolved into a multi-division company that spans both consumer wellness and clinical care, rooted in the same scientific foundation.

L-Nutra Health is the medical division of L-Nutra. We focus on helping people manage and potentially reverse chronic health conditions—like type 2 diabetes, prediabetes, insulin resistance, and obesity—using personalized, lifestyle-based programs grounded in evidence, not prescriptions.

A Timeline of Innovation

2008

The Beginning

Early research begins at the University of Southern California Longevity Institute

2015

Clinical Trials

Prolon clinical trials published; NIH begins funding fasting research

2016

Launch

Prolon is launched for consumer use

2019

L-Nutra Health Founded

 L-Nutra Health is founded as the clinical care division

2021–2024

Partnership

L-Nutra partners with leading institutions (e.g., Heidelberg, UCLA, Charité) to run metabolic health and diabetes reversal studies

2025

The Beginning

L-Nutra Health expands into digital clinical care, supporting patients nationwide through licensed dietitians and physicians

Our Leadership

Dr. Valter Longo

Dr. Valter Longo PhD

Founder of L-Nutra

Director of the USC Longevity Institute and inventor of the Fasting Mimicking Diet. A pioneer in nutrition and aging research.

Dr. Joseph Antoun

Dr. Joseph Antoun MD, PhD, MPP

CEO, L-Nutra

A physician and public health expert focused on transforming healthcare from prescription-based to food-based care.

Dr. William Hsu

Dr. William Hsu MD

Chief Medical Officer, L-Nutra

Harvard-trained endocrinologist and former VP at Joslin Diabetes Center. Leads clinical program development and care protocols.

Ashley Bizzell

Ashley Bizzell MS, RD

Director of Clinical Nutrition

Leads our national team of dietitians and is responsible for translating the science into patient-first care strategies.

What makes us differet

Rooted in Research:

$48M in NIH funding, 25+ years of scientific study

Mission-Driven:

We believe food should be a first-line therapy—not a last resort

Whole-Person Care:

We combine clinical oversight, advanced nutrition therapy, and real-world behavior change strategies that are proven to work

Evidence-Based Outcomes:

67% of patients reduce diabetes medications, 1.4% A1C drop, 22 lbs fat-focused weight loss (while preserving muscle)

What Doctors Are Saying

Dr. William Hsu

"We’ve spent decades treating diabetes with medication. Now, with food as medicine, we’re changing the conversation to prevention and remission—and it’s working."

Dr. William Hsu

Chief Medical Officer, L-Nutra Health

Dr. Felice Gersh

"I’ve seen firsthand how nutrition can transform women’s metabolic health, from hormone balance to insulin resistance. The results are real—and long overdue."

Dr. Felice Gersh

Board-Certified OB-GYN, Integrative Women's Health Specialist

Dr. Jason Fung

"When you address the root cause—like insulin resistance—you’re not just managing disease. You’re restoring health. And for many, that means freedom from medications."

Dr. Jason Fung

Nephrologist & Author of The Diabetes Code

Wondering how we can help you?

Type 2 diabetes, prediabetes, or weight struggles? See how L-Nutra transforms outcomes when standard care falls short.

Healthcare Providers

Clinically proven improvements to metabolic health and weight loss similar to a heart-healthy diet

Employers

Healthier workforce, reduced absenteeism, increased mental clarity.

Brokers & Consultants

Cutting edge corporate wellness benefits for your clients.

Health Plans & Systems

Significantly less expensive per patient per year than leading weight loss and diabetes drugs