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"Finally, healthy lasting daily fuel" - James "Finally, protein for aging" - Sarah "Backed by science we trust" - Bethany "Finally, healthy lasting daily fuel" - James "Finally, protein for aging" - Sarah "Backed by science we trust" - Bethany "Finally, healthy lasting daily fuel" - James "Finally, protein for aging" - Sarah "Backed by science we trust" - Bethany "Finally, healthy lasting daily fuel" - James "Finally, protein for aging" - Sarah "Backed by science we trust" - Bethany

We raised the bar on healthy protein

Prolon L-Protein Bar

Protein is essential to life and to muscle protection and growth. But eating some kinds of protein can increase levels of pro-aging hormones like IGF-1—and many protein products contain additives that can compromise your health. The L-Protein Bar is different

Formulated by the longevity scientists behind the Prolon 5-Day Fasting Mimicking Diet (FMD), this bar delivers the clean, complete plant-based protein that fuels your strength and vitality, without the elements that age you

Prolon L-Protein Bar
Longevity Product

Protein built for longevity

Designed for longevity

Formulated to support muscle without accelerating aging

Uncompromisingly clean

Vegan, free of soy, gluten, dairy, GMOs, and added sugars

Complete plant protein

Vegan protein that rivals animal protein without the pro-aging downsides

Smart nutrition

High in fiber and iron, and designed to support healthy blood sugar levels.

Made with extra virgin olive oil

A heart-healthy fat shown to be associated with increased longevity

Based on 25 years of research

Formulated by the longevity scientists behind the 5-Day FMD

Don't age while you eat

You eat protein to be healthy. But many popular protein products may actually be accelerating aging. Here's how the L-Protein Bar compares

PROLON

TYPICAL

Soy-free

Yes
No

Gluten-free

Yes
No

Dairy-free

Yes
No

Non GMO

Yes
No

No sugar alcohols

Yes
No

No artificial sweeteners

Yes
No

No artificial colors

Yes
No

Nothing to hide

Yes
No

Complete amino acid profile

Yes
No

Won't spike aging factors

Yes
No

Real chocolate

Yes
No

← Scroll horizontally to see comparison →

A smart way to fuel your day — and your life

Try it as a meal replacement, pre- or post-workout snack, part of a daily longevity diet, or anytime you want strength and energy without compromise

Nutritional highlights (per bar):

13-14g Plant-based protein
150 Calories
Low glycemic formulation
High fiber + iron
No added sugars
Made with real chocolate, not palm oil

Loved by customers and longevity experts

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"A game changer for protein"

JESSICA S.

Verified purchaser

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"Perfect for my daily routine"

MICHAEL R.

Verified purchaser

Protein designed for
strength & longevity

NAVIGATE

HomeLongevity Protein ShakeLongevity Protein BarVisit Prolon Life

NEWSLETTER

Join the protein revolution

Prolon Logo

Protein designed for
strength & longevity

NAVIGATE

HomeLongevity Protein ShakeLongevity Protein BarVisit Prolon Life

NEWSLETTER

Join the protein revolution

Prolon Logo

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Longevity Protein is owned and operated by Prolon Life, a L-Nutra Company. For checkout or concerns, please contact us at customerservice@l-nutra.com

New

L-Protein Bar
(12 ct bars)

starting at $3.46/bar$49.00
Meet our new L-Protein Bar—the only protein bar created by longevity scientists to nourish your muscles without accelerating aging. Support your future, not just your next workout.

Longevity protein—designed for strength and healthy aging
  • Support your strength without spiking aging factors
  • Complete amino acid profile
  • Backed by 25 years of longevity science
  • Truly clean vegan protein: No GMOs, soy, artificial sweeteners, or artificial colors
  • Check markHSA/FSA Eligible through Sika
  • Check markFree shipping over $200

View & download the nutritional information


Ingredients: Pea protein, chicory root fiber, dates, unsweetened chocolate, glycerin, rice starch, extra virgin olive oil, cocoa processed with alkali, black bean flour, natural flavors, chickpea protein, sunflower lecithin, acacia gum, L-methionine, rosemary extract.


Protein Bar Nutritional Facts

Fuel your day—and your future
Prolon proteins for:

  • After fasting – Gently refuel without spiking IGF-1s
  • Breakfast – A clean start that supports metabolic health
  • Pre- or post-workout – Nourish muscle without accelerating aging
  • On the go – Convenient, longevity-aligned protein to take anywhere