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L-Protein Bar
Meet our new L-Protein Bar—the only protein bar created by longevity scientists to nourish your muscles without accelerating ageing. Support your future, not just your next workout. Longevity protein—designed for strength and healthy ageing
Support strength without spiking ageing factors
Support strength without spiking ageing factors
Complete amino acid profile
Complete amino acid profile
Backed by 25 years of longevity science
Backed by 25 years of longevity science
Truly clean vegan protein: No GMOs, soy, artificial sweeteners, or artificial colours
Truly clean vegan protein: No GMOs, soy, artificial sweeteners, or artificial colours
Free shipping over 149€
How to use
Fuel your day—and your future
Prolon proteins for:
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After fasting – Gently refuel without spiking IGF-1s
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Breakfast – A clean start that supports metabolic health
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Pre- or post-workout – Nourish muscle without accelerating aging
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On the go – Convenient, longevity-aligned protein to take anywhere
Nutritional information and allergen warning
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.
ADD THE ESSENTIALS:
We raised the bar on healthy protein
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.
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 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 ageing. Here's how the L-Protein Bar compares.
PROLON
TYPICAL
Soy-free
Gluten-free
Dairy-free
Non GMO
No sugar alcohols
No artificial sweeteners
No artificial colors
Nothing to hide
Complete amino acid profile
Won't spike aging factors
Real chocolate
← 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):
14g Plant-based protein
170 Calories
Low glycemic formulation
High fiber + iron
No added sugars
Made with real chocolate, not palm oil
1,000,000+ Happy Healthy Customers
Backed by science, loved by users
“It works—weight management, energy, and mental clarity.”
- Zaree
Verified Reviewer
"I lost 5 pounds my first round and felt amazing."
- Amy
Verified Reviewer