The zoom calls with Cynthia Sass were very helpful, offered great tips, and made following the plan easy. It helped me keep focus daily on why I was doing this and gave me the motivation to continue.... Toon meer
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Lees wat reviewers zeggen
This company is top notch. Everything from their products, to the research that backs them. Their support through the fasting experience, as well as additional product solutions outside of your main... Toon meer
They sneakily signed me into subscription -I tried to cancel and they said order. Sent already even tho I sent email minutes after. Then when I emailed again response was from different co referring m... Toon meer
Bedrijf heeft geantwoord
I love the Prolon FMD programs, products, and customer service! All three are stellar and I have no doubt Prolon is helping me achieve the best health possible. Getting the benefits of fasting while e... Toon meer
Bedrijfsgegevens
Geschreven door het bedrijf
Prolon is a science-driven nutrition brand focused on supporting healthy aging and longevity through evidence-based nutritional programs. Its flagship product, the Prolon 5-Day Diet, is a patented Fasting Mimicking Diet (FMD) developed from more than 25 years of research and 40+ published clinical studies conducted in collaboration with USC, Mayo Clinic, and Stanford, to help the body enter a fasting-like state while still providing carefully formulated nourishment that supports natural cellular renewal. The 5-Day Diet is a complete, pre-packaged nutrition program that includes portioned meals, snacks, and beverages for each day, making the experience simple to follow without calorie counting or meal planning. Clinical research published in peer-reviewed journals, including Nature Communications, found that participants completing three consecutive monthly cycles experienced an average 2.5-year reduction in biological age markers, while also supporting healthy metabolism, preserving lean muscle, and promoting fat loss. But the 5-Day Diet is only the beginning. The same decades of longevity research that gave rise to the FMD also informed Prolon's broader ecosystem of science-backed products designed for everyday life. This includes L-Biome, a precision probiotic formulated to support gut health and metabolic function; fast bars, developed to extend the fasting state between meals; nutrition shakes built around longevity-supporting protein ratios; and guided reset programs that combine multiple Prolon products into structured, longer-term health protocols. Every product in the Prolon line shares the same origin, rigorous peer-reviewed science, and the same goal: to give your body what it needs to function better for longer. Founded on the belief that nutrition should be grounded in rigorous scientific research rather than trends, Prolon develops all of its products using a research-first approach. Prolon is part of L-Nutra, a nutrition technology company dedicated to advancing evidence-based nutrition for healthy aging and longevity. Our mission is to make cutting-edge longevity science accessible to everyone because how you age is not simply something that happens to you. It is something you can actively shape.
Contactgegevens
Verenigde Staten
- prolonlife.com
4,1
Goed
10K reviews
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Prolon is one of the best in terms of…top of the line customer service.
Prolon is one of the best in terms of customer service. I have yet to share a possible issue, and they are right on top of it. I've never gone longer than 20 minutes, and a customer service representative contacted me and addressed whatever it was within minutes. Their service is both personal and professional. At a time when the opposite is true with many businesses, Prolon is the exception with very high standards. Regarding their products, I have complete confidence in everything I have ordered and in all upcoming purchases. Superior products backed by science with years of research.
30 juli 2026
Review zonder uitnodiging
Antwoord van Prolonlife
Hi Katherine,
Thank you so much for your incredibly thoughtful review,
Your kind words truly mean a great deal to our entire team. We're honored to know that you've consistently had positive experiences with our customer support and that you've found our team to be both responsive and personable.
It's especially meaningful to hear your confidence in our science-backed products and research.
Thank you for placing your trust in us. We're grateful to have you as part of the Prolon community and look forward to continuing to support you on your longevity journey.
Antwoord van Prolonlife
Hi James,
Thank you for your review, James!
We're so glad to hear that getting started with Prolon was a smooth and easy experience. We hope your upcoming 5-Day Fasting Mimicking Diet is a positive one, and we're excited to be part of your health journey.
If any questions come up before or during your fast, please don't hesitate to reach out. Our team is always here to support you.
Hopeless Customer Care
Your customer care is absolutely disgraceful. A lost delivery with no explanation and not even the courtesy of an apology is unacceptable. Step up your game immediately if you want to be taken seriously.
A simple apology for an order processed on 9th July against order #EUR13419 and still not received on 31/7 would have been appreciated from your CC support team. However it was business as usual for Prolon!
29 juli 2026
Review zonder uitnodiging
Antwoord van Prolonlife
Hi Tarran,
Thank you for taking the time to share your feedback. We sincerely apologize for the inconvenience caused by the delays with your order.
Because your order was placed in Europe, we partnered with our L-Nutra Europe team to ensure you received the support you needed.
Our European Customer Care team investigated the missing shipment with the carrier and arranged a replacement order while the investigation was still underway. They also provided updated tracking information throughout the process.
There appears to be a secondary delay due to customs clearance. Our understanding is that the European team has been communicating with you throughout this process. If that is not the case, please let us know so that we may intervene on your behalf to make sure you are receiving regular updates.
We appreciate your patience as we wait for customs to clear the shipment for delivery.
Please let us know if you would like to discuss the situation with our team. We are here to support you.
Figuring out times and options for…
Figuring out times and options for shipping was not easy at all the way the website is set up
28 juli 2026
Antwoord van Prolonlife
Hi Evans,
Thank you for taking the time to share your experience. We truly value your feedback and are committed to ensuring you have the best possible experience with Prolon.
We're sorry to hear that navigating the shipping options on our website was frustrating. We understand how important it is for the ordering process to be clear and easy to follow, and we appreciate you bringing this to our attention.
To provide some info, it typically takes 5-10 business days for an order to arrive once it is placed under the standard shipping option. However, we also have an expedited shipping option at an additional cost, which would take about 4 business days total.
Our Customer Care team has already reached out to you directly via email from customerservice@l-nutra.com to better understand your experience, address your concerns, and work with you toward a resolution.
Your satisfaction is very important to us, and we are dedicated to making your experience as smooth and positive as possible.
We look forward to hearing from you and appreciate the opportunity to support you further.
Good to know that I’m working with a…
Good to know that I’m working with a good company and good people. Having a positive experience all the way around is rare!
28 juli 2026
Antwoord van Prolonlife
Hi Suhagini,
Thank you so much for your kind words! It truly means a great deal to hear that you've had such a positive experience with both our team and the Prolon program. Providing thoughtful support throughout your wellness journey is something we care deeply about, so knowing we've made a difference is incredibly rewarding.
We sincerely appreciate you being part of the Prolon community and wish you continued success on your longevity journey!
Did not go too well since I ordered a 5…
Did not go too well since I ordered a 5 day box only to find that somehow I ordered the subscription vs an individual 5 day box. Now I have to figure out how to cancel the subscription which will impact the price of the box. Probably best thing to do is keep the subscription for an another box and then cancel it. All I wanted was 1 box!
28 juli 2026
Antwoord van Prolonlife
Hi Debra,
Thank you for taking the time to share your feedback. We're sorry to hear that your ordering experience wasn't what you expected.
We're glad our Customer Care team was able to connect with you and help cancel your subscription according to your preferences.
We'd also like to provide a little additional context. Our website offers both a one-time purchase option and a Subscribe & Save option, and customers are able to choose their preferred purchase method during checkout. Subscribers also receive an email reminder several days before their next renewal, and subscriptions can be managed or canceled at any time through the customer portal before the next order is processed.
We understand that subscription purchases can sometimes be confusing, and we truly appreciate you sharing your experience. Feedback like yours helps us continue improving the customer experience and making the ordering process as clear as possible.
Thank you again for giving Prolon a try. If you ever decide to continue your wellness journey with us in the future, we'd be more than happy to support you.
Please don't hesitate to contact our Customer Care team at customerservice@l-nutra.com if there's ever anything we can assist you with.
We wish you all the very best on your health and wellness journey.
Since starting the 5 day FMD program
Since starting the 5 day FMD program. I feel so much better. Im trying to get my gal onboard.
28 juli 2026
Antwoord van Prolonlife
Hi Shaunna,
Thank you so much for sharing your experience! We're delighted to hear that you're already feeling so much better since starting the 5-Day Prolon program. It's wonderful to know you're experiencing the benefits firsthand.
We also love hearing that you're trying to get your friend on board! Thank you for sharing your enthusiasm and for being part of our growing Prolon community.
Please, don't hesitate to reach out if you ever have any questions.
Antwoord van Prolonlife
Hi Glenda,
Thank you so much for sharing your feedback! We’re delighted to hear that you enjoyed the taste of the products. Making the fasting experience both effective and enjoyable is very important to us, and we’re so happy to know the flavors were a positive part of your Prolon journey.
Thank you for being part of the Prolon community, and we appreciate you taking the time to share your experience with us!
BEWARE the SUBSCRIPTIONS !!!
My goal was to order one five day reset yet when the time to check out came Prolon had secretively-WITHOUT MY PERMISSION-sigened me up for what would amount to a LIFETIME SUBSCRIPTION which took me ten minutes to cancel. BEWARE!!!! Great product. UNSCUPULOUS, DECEPTIVE online ordering!!!
28 juli 2026
Antwoord van Prolonlife
Hi Robert,
Thank you for taking the time to share your experience. We truly value your feedback and appreciate the opportunity to address your concerns.
We sincerely apologize for the frustration this situation caused. We understand how concerning it can be if it appears that a subscription was created unintentionally.
To better understand your experience, Our Customer Service Team has already reached out to you directly via email from customerservice@l-nutra.com to help address and clarify your concerns, learn more about what happened, and ensure we have a complete understanding of your concerns.
After reviewing your account, I confirmed that there are no active subscriptions associated with it, so we are curious to understand and support you further.
Our Subscribe & Save option is always optional during checkout, and customers can choose between a one-time purchase or a subscription. If there was anything during the ordering process that created a different impression, we would genuinely appreciate the opportunity to understand your experience so we can investigate it further.
Your satisfaction is very important to us, and we are committed to providing the best possible experience. I look forward to hearing from you by email and hope to have the opportunity to provide additional clarity and support.
Excellent ingredients........just wish…
Excellent ingredients........just wish the pricing was slightly less.
27 juli 2026
Antwoord van Prolonlife
Hi John,
Thank you for taking the time to share your feedback. We're so glad to hear you appreciate the quality of our ingredients, and we truly value your honest thoughts regarding pricing.
Our Customer Service Team has reached out to you directly to offer a solution as a small token of our appreciation for your feedback. We remain committed to making Prolon as accessible as possible while maintaining the quality and benefits backed by more than 20 years of scientific research.
Thank you again for being a part of the Prolon community. We sincerely appreciate your support and look forward to continuing to support you on your wellness journey.
I did not receive free Prolon bars as…
I did not receive free Prolon bars as was advertised
27 juli 2026
Antwoord van Prolonlife
Hi Steven,
Thank you for taking the time to share your experience. We truly value your feedback and are committed to ensuring you have the best possible experience with Prolon.
We sincerely apologize for the inconvenience and frustration this situation must have caused you and know that we are here to support you improving this experience.
Our Customer Service Team has already reached out to you directly via email from customerservice@l-nutra.com to help address and clarify your concerns and work with you toward a resolution.
Your satisfaction is very important to us, and we are dedicated to making your experience as smooth and positive as possible.
We look forward to your response and the opportunity to support you further.
Definitely worth trying
After three rounds of Prolon I have seen some significant changes in my cravings, metabolism, aches and pains, and mental clarity. They have lasted now another 2 months. It’s not a super easy diet, but there is a whole community of followers that help you get through it, which is really quite helpful and amazing. I
Am 68 years old, have a few bad joints from old injuries but otherwise active and healthy to start, but feel even stronger and better. I would recommend learning more about the benefits and see if it’s right for you.
27 juli 2026
Antwoord van Prolonlife
Hi Cindy,
Thank you so much for sharing your experience! We're delighted to hear about the positive changes you've noticed in your cravings, metabolism, mental clarity, and overall well-being after completing three rounds of Prolon.
It's especially wonderful to know that our community and daily support helped make the journey more manageable.
We truly appreciate your recommendation and are grateful to be part of your wellness journey. Thank you for being a valued member of the Prolon community!
The Real Deal
I had been seeing PROLON Fast while online and finally decided to try it.
I began my first 5 Day Fast on June 3rd... I ate only what was in each days box and followed the program 100% - didn't even have any coffee for the whole 5 days.
I found myself disciplined and not all that hungry (save for maybe Day 3) and never waivered.
After 5 days - I weighed myself on Day 6 and had lost 10 pounds.
I continued eating everything in moderation and using portion control.
I found myself stuck on a plateau and ordered another 5 Day Fast, which I started on July 22nd, so I am currently on Day 5 and down about 5.5 pounds.
Tomorrow I go back to 'normal' eating, but hopefully having reset my body. I hope to continue to lose weight and achieve my goals.
3 juni 2026
Antwoord van Prolonlife
Hi Shannon,
Thank you for taking the time to share your experience!
Congratulations on your incredible dedication to following the program and on the progress, you've made so far. We're excited to hear that you found the program manageable and that it helped support your wellness and weight management goals.
We wish you continued success as you work toward your goals and truly appreciate you allowing Prolon to be part of your journey. Thank you for being a valued member of our community!
I did not read the ingredients list…
I did not read the ingredients list carefully enough. I wanted bars with no almonds and no sugar (which includes no honey), but these are not they.
21 juli 2026
Antwoord van Prolonlife
Hi Jeremy,
Thank you for taking the time to share your feedback. We're sorry to hear that our bars weren't the right fit for your dietary preferences.
Our Customer Service Team has already reached out to you directly to better understand your concerns and help work toward a resolution. We truly appreciate you bringing this to our attention, as feedback like yours helps us continue improving the customer experience.
Thank you again for your honest review, and we hope to have the opportunity to support you in the future.
Products are good and tasty, but can't comment on the 5 day fast results
Products are good and tasty. I can't tell you that I have lost weight because I have not did the 5 day fast.
7 juli 2026
Antwoord van Prolonlife
Hi Tony,
Thank you for taking the time to share your feedback! We're so glad to hear you're enjoying the taste and quality of our products.
If you decide to complete a full 5-Day Prolon program in the future, we'd love to hear about your experience. In the meantime, if you have any questions about getting started or how to make the most of the program, our team is always here to help and support you. Feel free to contact us at: customerservice@l-nutra.com
Thank you for being part of the Prolon community, and we look forward to being part of your wellness journey!
I had a great experience with…
I had a great experience with Prolonlife. The product arrived on time, the packaging was clean and professional, and the instructions were easy to follow. I felt supported throughout the process. I’m genuinely happy with the results and would recommend Prolonlife to anyone looking to improve their wellness routine.
21 juli 2026
Antwoord van Prolonlife
Hi Robin,
Thank you so much for sharing your wonderful experience! We’re happy to hear that your Prolon journey was smooth from start to finish, from receiving your kit to following the program and feeling supported throughout the process.
We truly appreciate your kind words about our packaging, instructions, and support team. Our goal is to make the Fasting Mimicking Diet as simple and approachable as possible while providing the guidance needed to feel confident throughout the experience.
Thank you for trusting Prolon as part of your wellness routine and for recommending us to others. We’re grateful to be part of your longevity journey and wish you continued health and wellness! 💚
Been using ProLon for years and always…
Been using ProLon for years and always looking forward to my next delivery
22 juli 2026
Antwoord van Prolonlife
Hi Jeff,
Thank you so much for your wonderful review! We’re excited to hear that you’ve been incorporating Prolon into your wellness routine for years and that you continue looking forward to each delivery.
We truly appreciate your continued trust and support. It means so much to be part of your longevity journey, and we’re excited to continue supporting you along the way!
Wishing you continued health and wellness.
An Easy Option for a 5 day Fast
Not only was the product amazing, but the support was as well. The food (although limited) was delicious and clean. I have been an intermittant faster for years, but could not seem to do any type of meaningful long term fast... Until now with the help of Prolon. I loved the journey so much, I am going to incorporate it into my health coaching program. Kuddos to ProloneLife!
20 juli 2026
Antwoord van Prolonlife
Hi Anita,
Thank you so much for sharing your wonderful experience with ProLon! We are thrilled to hear that the program helped make your fasting journey more approachable and that you enjoyed both the nutrition and the support provided along the way.
It is amazing to hear that, as someone who has practiced intermittent fasting for years, ProLon helped you experience the benefits of a longer fasting approach in a structured and supported way. We are also excited to hear that you plan to incorporate the program into your health coaching journey!
Thank you again for your kind words and for trusting Prolon as part of your wellness routine.
We wish you continued success on your longevity journey!
Exceptional Customer Service
In a time when virtually no company has real people to talk to, I very much appreciate Prolon's team. Any issues I have had they have immediately gotten back to me with a great response. I have zero complaints. On top of that their 5 day organic fasting program is outstanding. I am obsessed.
20 juli 2026
Review zonder uitnodiging
Antwoord van Prolonlife
Hi There,
Thank you so much for your incredible review! We truly appreciate you taking the time to share your experience with both our Customer Care team and the Prolon program.
We are so happy to hear that our team was able to provide the support you needed and that you felt cared for throughout your journey. Providing guidance and support is such an important part of the ProLon experience, and we are grateful to know that it made a difference for you.
It’s wonderful to hear that you are enjoying the 5-Day Fasting Mimicking Diet and are feeling so positive about your experience. Thank you for being part of the Prolon community, and we look forward to supporting you on your continued longevity journey!
Antwoord van Prolonlife
Hi Douglas,
Thank you for your wonderful review! We're happy to hear that you've had a positive experience with Prolon and found it to be an effective way to support your health goals. We truly appreciate you taking the time to share your experience and wish you continued success on your longevity journey!
Since you mentioned that you were pleased with the weight loss benefits of the program, we thought you might be interested in our Prolon Guided Health Program a comprehensive solution designed to help reset your metabolism, support sustainable weight loss, and improve cardiometabolic health.
Built on more than 25 years of research and supported by over 40 clinical trials, this program combines the patented Fasting Mimicking Diet (FMD) with personalized nutrition guidance and ongoing lab monitoring. The result is a science-backed, structured approach that provides measurable outcomes while ensuring you are supported every step of the way.
You can learn more about the program here: https://bit.ly/Prolonguidedprogram
We truly appreciate you taking the time to share your experience and wish you continued success on your longevity journey!
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