For businessesSearchWrite a reviewCategoriesAbout
简体中文English
Beauty & Well-being

Prolonlife

ClaimedCollecting reviews

201 reviews

4.2201 reviews
Write a review

About Prolonlife

Data updated
Website
prolonlife.com
Category
Beauty & Well-being
Location
United States
Status
Unclaimed
Last 12 months
201 reviews
Replies to negative
97% (31/32)
Do you own Prolonlife? Claim this profile for free and start replying to reviews.

About this business

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.

Written by the business, not verified by us.

Is Prolonlife legit?

Prolonlife (prolonlife.com) has a 4.2 out of 5 rating on OK.one, based on 201 user reviews collected here. It is listed under Beauty & Well-being and its reputation is good. 77% of reviews are 4 stars or higher and 8% are 1 star; The business has replied to 97% of negative reviews; Reviews mostly discuss Product, Quality, User experience. Last updated 2026-08-12.

What reviewers say

AI generated

Reviewers had a great experience with this company. Customers frequently highlight the exceptional quality and delicious taste of the products, noting that the structured daily routines make fasting surprisingly satisfying and easy to follow. Consumers consistently praise the professional guidance and responsive customer service representatives who quickly resolve questions and assist with purchases. However, some reviewers were not happy with ordering complications, mentioning unexpected subscription renewals and difficulties managing automated shipments. A few other people also felt that certain food flavors were unappealing or grainy, while others reported frustrating shipping delays. Some individuals additionally experienced missing components in their delivered kits or found specific snack items difficult to enjoy.

Auto-generated from all reviews of this business. For reference only.

What people say

Honest and trustworthy company …

They were very helpful and staff helped me get my order completed. This an honest and trustworthy company with amazing products ! Anyone wanting to improve their health should use Prolon’s products. I Would recommend Prolon to everyone. You can’t go wrong by putting your health needs in their hands. I will be a lifetime member!

Reply from Prolonlife2026-07-31

Hi Kathleen, Thank you so much for your thoughtful review, We're truly grateful for your kind words and are delighted to hear that our team was able to help you complete your order. It means so much to us to know that you feel supported and have confidence in both our products and our team. Your trust and recommendation are the greatest compliments we could receive. We're honored to be part of your longevity journey and look forward to supporting you for many years to come. Thank you for being a valued member of the Prolon family!

I reached out several times stating I…

I reached out several times stating I cannot access my subscription, it kept saying no subscription found... and now the order has shipped and I wanted to change the type I was getting, because there are things I don't like in the current kit. No one ever responded.

Reply from Prolonlife2026-08-04

Hi Laura, Thank you for taking the time to share your feedback. We're truly sorry to hear about the frustration you experienced while trying to manage your subscription. We're glad we had the opportunity to connect with you by phone, better understand what happened, and work through your concerns together. We appreciate you taking the time to speak with us, and we're happy we were able to assist you with updating your subscription to better match your preferences. We always strive to respond to our customers as quickly as possible, and we sincerely apologize that your experience did not reflect the level of service we aim to provide. Your feedback is incredibly valuable and helps us continue improving both our website and customer experience. Thank you again for giving us the opportunity to assist you. If you ever need anything in the future, please don't hesitate to reach out to us at [email protected]. We're always happy to help.

I feel great

I feel great. Day 3 is the hardest, but the 5 day FMD is very doable. I recommend it to anyone who wants to fast.

Reply from Prolonlife2026-07-31

Hi William, Thank you so much for sharing your experience! We're so glad to hear you're feeling great and that you found the 5-Day FMD to be very doable. Day 3 can certainly be one of the more challenging days for many participants, so it's wonderful to hear you pushed through and had such a positive experience. Thank you for your recommendation and for allowing Prolon to be part of your longevity journey. We truly appreciate your support and look forward to being here for you whenever you're ready for your next round!

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!

Reply from Prolonlife2026-07-30

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.

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.

Reply from Prolonlife2026-07-31

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.

Not only did they take care of my…

Not only did they take care of my request they saw I had 2 different subscriptions so they merged them proactively! Great products and great service too!

Reply from Prolonlife2026-07-31

Hi Rene, Thank you so much for your wonderful review, Rene! We're delighted to hear that we were able to resolve your request and proactively simplify your account by merging your subscriptions. Providing a seamless experience and personalized support is always our goal, and it's wonderful to know that it made a difference. We truly appreciate your kind words about both our products and our customer service. Thank you for being part of the Prolon community!

All easy to sign up

All easy to sign up! Will be starting in a few weeks.

Reply from Prolonlife2026-07-31

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.

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!

Reply from Prolonlife2026-07-30

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!

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

Reply from Prolonlife2026-07-30

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 [email protected] 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.

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!!!

Reply from Prolonlife2026-07-28

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 [email protected] 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.

The taste of the product are delicious.

Reply from Prolonlife2026-07-28

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!

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.

Reply from Prolonlife2026-07-30

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.

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!

Reply from Prolonlife2026-07-30

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 [email protected] if there's ever anything we can assist you with. We wish you all the very best on your health and wellness journey.

I did not receive free Prolon bars as…

I did not receive free Prolon bars as was advertised

Reply from Prolonlife2026-07-28

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 [email protected] 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.

Reply from Prolonlife2026-07-27

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!

Excellent ingredients........just wish…

Excellent ingredients........just wish the pricing was slightly less.

Reply from Prolonlife2026-07-27

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.

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.

Reply from Prolonlife2026-07-27

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!

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.

Reply from Prolonlife2026-07-27

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: [email protected] Thank you for being part of the Prolon community, and we look forward to being part of your wellness journey!

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.

Reply from Prolonlife2026-07-27

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.

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.

Reply from Prolonlife2026-07-23

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! 💚

People also looked at