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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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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Antwoord van Prolonlife
Hi Maria,
Thank you for taking the time to share your feedback. We understand your concern regarding the sodium content, and we'd like to provide a little more context.
Prolon's sodium content ranges between 1.6 and 2 grams per day, which falls within the American Heart Association's recommended daily sodium intake for a heart-healthy diet. During the fasting-mimicking program, sodium plays an important role in helping your body retain the water you drink, supporting hydration and helping offset the electrolyte losses that can occur during fasting. Together with potassium, sodium is essential for maintaining proper fluid balance throughout the program.
We truly appreciate your feedback and understand that everyone's dietary preferences and needs are different. Thank you again for sharing your experience with us.
Prolon 5 day program is very helpful in…
Prolon 5 day program is very helpful in keeping blood sugar under control. It is undeniably expensive, however.
29 juni 2026
Antwoord van Prolonlife
Hi Andrew,
Thank you for sharing your experience! We're so glad to hear that the Prolon 5-Day Program has been helpful in supporting your blood sugar goals. We also appreciate your honest feedback regarding the cost. Prolon is the result of over 25 years of research and is carefully formulated with specific ingredients and nutrients to help deliver the benefits demonstrated in our clinical studies.
Thank you again for your thoughtful review, and we truly appreciate your support!
Really easy checkout and good food
Really easy checkout with coupons! Food has been yummy so far and I cant believe I'm having fasting benefits with it!
14 juli 2026
Antwoord van Prolonlife
Hi Alexis,
Thank you so much for your kind review! We're excited to hear that checkout was easy, you were able to take advantage of our coupons, and most importantly, that you're enjoying the food.
One of the things that makes Prolon unique is its ability to nourish your body while helping you access the benefits of fasting, so we're delighted to hear you're already experiencing that.
We hope the rest of your journey is just as enjoyable and thank you for choosing Prolon!
Thank you for the great CustomerCare!
17 juli 2026
Antwoord van Prolonlife
Hi Fusako,
Thank you so much for your kind words! We're excited to hear you had a great experience with our Customer Care team. Providing thoughtful support is always our goal, and we're grateful you took the time to share your feedback.
We look forward to supporting you again on your longevity journey!
My issue isn’t with ProLon—it’s with…
My issue isn’t with ProLon—it’s with Shop. I refuse to give an app broad access to my phone just to track a package. Customers deserve a simple tracking link without signing up. I still haven’t a clue on when it will ship, how and when it will be delivered to prep for a 5 day fast… ugh!
15 juli 2026
Antwoord van Prolonlife
Hi Bruce,
Thank you for taking the time to share your feedback. We're sorry to hear about the frustration you've experienced with the shipping and tracking process.
We completely understand your preference for receiving a simple tracking link without needing to use an additional app. Please know that downloading or signing up for Shop is not required to track your Prolon order. Once your order ships, tracking information is also sent via email, and our Customer Care team is always happy to provide your tracking details if you're unable to locate them.
Your feedback is truly valuable, and we'll be sure to share it with our team as we continue looking for ways to improve the customer experience.
If you haven't already, please feel free to send us a private message with your order number or email address, and we'd be more than happy to provide you with an update on your shipment and expected delivery date.
We're here to help and want to make sure you're able to plan your 5-Day Prolon journey with confidence.
Feel Like Superman
I came into this with an open mind, hoping to feel a little less bloated. Not only did the bloating go away, but I also feel way more energized, I'm in a better mood, and I'm much more focused, which is something I really need in my line of work.
I'm actually quite shocked by how good I feel. Days 1 and 2 were hard, Day 3 was better, but by Day 4, I felt like Superman.
15 juli 2026
Antwoord van Prolonlife
Hi Jordan,
Thank you so much for sharing your experience! We're excited to hear that not only did your bloating improve, but you also experienced increased energy, better focus, and an improved mood. We especially loved your "felt like Superman" description. It perfectly captures what many people notice as they progress through the program!
It's completely normal for the first couple of days to be the most challenging as your body transitions into the fasting-mimicking state. Hearing that Day 4 was such a turning point for you is incredibly exciting.
Congratulations on completing your first round, and thank you for trusting Prolon to be part of your longevity journey. We can't wait to hear how your future rounds go!
I was not notified prior to charging me…
I was not notified prior to charging me for a reoccurring subscription. I needed to delay due to traveling. Now will need someone to come by my house to pick it up when I will be gone
13 juli 2026
Antwoord van Prolonlife
Hi Karen,
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 sincerely sorry for the inconvenience and frustration this situation has caused, especially with your upcoming travel plans.
Our Customer Care Team has already reached out to you directly via email from customerservice@l-nutra.com to help address your concerns and work with you toward a resolution.
Your satisfaction is very important to us, and we're dedicated to making your experience as smooth and positive as possible. We look forward to hearing from you and having the opportunity to assist you further.
Customer service assisted me in getting…
Customer service assisted me in getting my order! They were very helpful.
13 juli 2026
Antwoord van Prolonlife
Hi Kris,
Thank you for taking the time to leave us a review!
We're so happy to hear that our customer support team was able to assist you with your order and provide the help you needed. Delivering a smooth and supportive experience is always our goal.
We truly appreciate your feedback and hope you continue enjoying your Prolon journey!
Very good products and experience
Very good products, clear instructions and explanation of the science behind the FMD, superb coaching and text support on Whatsapp. I did not receive the expected welcome package, but as soon as I emailed support to ask about it, it was on its way. Timely answers to questions on the live coaching Zooms and Whatsapp group. Very good experience.
15 juni 2026
Antwoord van Prolonlife
Hi Diane,
Thank you so much for your thoughtful review!
We enjoyed hearing that you enjoyed the products, found the science and instructions easy to follow, and had such a positive experience with our coaching sessions, WhatsApp support, and live Zooms. Our goal is to make every customer feel supported throughout their journey, so it's wonderful to know those resources made a difference.
We're also glad we were able to quickly get your welcome package on its way after you reached out.
Thank you for being part of our community, and we look forward to supporting you again in the future!
Good program but dislike the soups.
I like the program but really dislike the soups. All flavors are not tolerable for me. Wish there was an alternative to soup
13 juli 2026
Antwoord van Prolonlife
Hi Melissa,
Thank you so much for sharing your honest feedback. We completely understand that the soups aren't everyone's favorite, and we truly appreciate you taking the time to let us know. Taste is very personal, and we recognize that everyone's preferences are different.
The soups and every item included in the Prolon program were carefully formulated over more than 20 years of research with a specific purpose: to nourish the body while helping it enter the fasting-mimicking state and access the science-backed benefits of the program, including cellular renewal (autophagy), metabolic support, and healthy aging. For that reason, every ingredient and macronutrient profile is intentionally designed to support the fasting response demonstrated in the clinical trials.
That said, we completely understand that enjoying the food is an important part of the experience. Feedback like yours is incredibly valuable, and we'll be sure to share it with our Product Development team as they continue working to improve the program while maintaining the same clinically studied benefits.
Thank you again for giving Prolon a try and for helping us continue to improve. We truly appreciate your feedback and hope you continue to experience the many health benefits the program was designed to deliver.
Coaching Sessions are a Must.
It was great not having to think about what to eat, best of all, avoiding the temptation to go back to old habits for 5 days. Joining the coaching sessions make all the difference, that daily nudge, especially during the last few days kept me going.
Pea protein-based soups were not my favorite, so I chopped up my olives (another non-favorite) and put them into the soup along with any cracker crumbs from the packet. Tomato soup is my hands down favorite!
10 juli 2026
Antwoord van Prolonlife
Hi Annette,
Thank you so much for sharing your experience!
We're so happy to hear that the structured meal plan and daily coaching sessions helped you stay on track and avoid slipping back into old habits. Having that extra encouragement, especially during the final days, can truly make a difference, and we're glad it was such a valuable part of your experience.
We also love hearing how you've found ways to enjoy the meals even more! Chopping the olives into the soup and adding the cracker crumbs is such a creative idea, and we're happy to hear the Tomato Soup earned the title of your favorite.
Congratulations on completing your program and thank you for allowing us to be part of your health journey!
Customer representative was (David)…
Customer representative was (David) knowledgeable about the products and the subscription program worked. My questions were answered, we love the products.
10 juli 2026
Antwoord van Prolonlife
Hi Norma,
Thank you so much for your kind words!
We're so happy to hear that David was able to answer all of your questions and help you navigate both our products and subscription program. We'll be sure to pass your compliments along to him!
Most importantly, we're so happy to hear that you love the products. Thank you for choosing Prolon, and we look forward to supporting you on your continued longevity journey!
This company has the worst customer…
This company has the worst customer service that I have experienced in years. Be careful if you decide to order from them.
10 juli 2026
Antwoord van Prolonlife
Hi Terry, thank you for taking the time to share your feedback. We truly value hearing from our customers and are sorry to hear that your experience did not meet your expectations.
Providing a supportive and positive customer experience is extremely important to us, and we sincerely apologize for any frustration or inconvenience you experienced.
Our Customer Care Team has reached out to you directly via email from customerservice@l-nutra.com so we can better understand what happened, review your concerns, and work with you toward the best possible resolution.
We appreciate the opportunity to address your experience and hope to support you further.
Antwoord van Prolonlife
Hi James,
Thank you so much for taking the time to share your kind feedback about Pablo. We’ll be sure to share your message with him. We’re certain it will make him very happy to know that his support made a positive impact.
Our Customer Service team is truly committed to providing the best possible support and guidance, and we appreciate you recognizing the care and dedication they bring to every interaction.
Please don't ever hesitate to reach out if you have any further questions. We are here for you.
Taking a chance and investing in your health
I've done a few water fast before and let me tell you it was extremely hard to get through rewarding yes but hard to get through but the way they lay it out on their Advanced system and the fact that you get to do it for 5 days I even start eating food and liking things that I never liked it like it just woke up my palate so I'm grateful thankful to them and I'm looking to hopefully get some more money to invest in my health and I'd like to get on a regimen where I would do multiple rounds of these every year if not multiples month after month after month thank you guys you really made an impact on my life
15 mei 2026
Antwoord van Prolonlife
Hi Ronnie,
Thank you so much for taking the time to share your experience.
We're truly honored to hear that Prolon has had such a meaningful impact on your health journey.
It's wonderful to hear that, compared with your previous water fasts, you found the Prolon program to be a more manageable experience while still feeling rewarding. We also love hearing that it helped you discover new foods and appreciate flavors you hadn't enjoyed before, that's a fantastic outcome!
We're grateful to be part of your wellness journey and are excited to hear you're considering incorporating Prolon into your long-term routine. Many people choose to complete the program monthly, quarterly, or biannually depending on their individual health goals, and we always encourage discussing the best approach with your healthcare provider.
Thank you again for your kind words and for trusting Prolon. We wish you continued success on your longevity journey and look forward to supporting you along the way!
Great customer service
Great customer service. Quick shipping and arrival. Everything tastes great. It totally resets my health journey. Love this company. Thank you for doing what you do. And for doing it with such quality. ☮️♥️😎
29 juni 2026
Antwoord van Prolonlife
Hi Lori,
Thank you so much for your wonderful review! We’re truly grateful for your kind words and are delighted to hear that you had a great experience with our customer service, fast shipping, and the quality of the program.
It’s especially rewarding to know that Prolon has helped reset your health journey. Hearing that our products and the care we put into them have made a positive difference means so much to our entire team.
Thank you again for your support and for being part of the Prolon community. We wish you continued success on your longevity and wellness journey!
I excellent customer service. Thank you for the product! wanted to let the company know that I…
I wanted to let the company know that I enjoyed the product. Unfortunately, soon after I got the second batch of products I ended up needing open-heart surgery. Unfortunately, I could not receive the next shipment because the doctor has me on a special diet. So when I saw that my subscription was ready I wrote in and had great emails conversation with Manella. She was so professional and kind and understanding and I really need that right now. When I feel better and I get the doctors OK I'll reach out again. My functional nutritionist recommended this for me. Thank you for the product and thank you for having Manella on your team.
28 juni 2026
Review zonder uitnodiging
Antwoord van Prolonlife
Hi Kathy,
Hi there,
Thank you so much for taking the time to share this with us, and I’m truly sorry to hear about everything you’ve been going through. I hope your recovery from open-heart surgery is going as smoothly as possible.
I’m really glad to hear that you enjoyed the product and that Manuela was able to support you with kindness and care during such a difficult time. I will make sure your kind words are shared with her and the rest of our team, it will mean a lot to her.
Of course, we completely understand your need to pause your subscription while you focus on your health and follow your doctor’s guidance. Your account will remain on hold, and there’s nothing further you need to do right now.
When you’re feeling better and your doctor gives you the green light, we’ll be more than happy to support you again whenever you’re ready.
Wishing you strength and a smooth recovery ahead, and thank you again for your thoughtful message.
I have tried twice now to sign in to…
I have tried twice now to sign in to my subscription but your site says it will send a link and then I never receive it.
26 juni 2026
Antwoord van Prolonlife
Hi Lisa,
Thank you for taking the time to share your experience. We sincerely apologize for the frustration you encountered while trying to access your subscription account.
Providing a smooth and reliable experience is very important to us, and we're sorry that this wasn't the case for you.
Our Customer Service team has reached out to you directly via email from customerservice@l-nutra.com to gather a few additional details and help troubleshoot the issue. We look forward to working with you to resolve this as quickly as possible.
Thank you again for bringing this to our attention. We truly appreciate your feedback and hope to have the opportunity to restore your confidence in your experience with Prolon.
Subscription flexibility
I appreciated the flexibility in changing my delivery date for a subscription due to conflicting travel plans.
24 juni 2026
Antwoord van Prolonlife
Hi Alex,
Thank you so much for your kind words! We're so glad we could help accommodate your travel plans and make adjusting your subscription as smooth as possible.
Providing flexible, supportive service is always our goal. We truly appreciate you being part of the Prolon community and wish you a wonderful experience with your next order!
This is my second time doing the…
This is my second time doing the Fasting Mimicking Diet and both times have been a great experience. Each day's food is in a separate box with suggestions on how to divide up each meal, but also lets you choose what and when to eat out of each days box. Signing up for the health coaching is a great help to educate and motivate you each day. When you have an issue, there response time and help is 2nd to none. The help transitioning back to a regular diet with some recipes is very helpful.
24 juni 2026
Antwoord van Prolonlife
Hi Grace,
Thank you so much for sharing your experience and for choosing to add Prolon to your health routine. We truly appreciate your continued trust in the program.
We’re so glad to hear that you’ve found the structure of the daily boxes helpful and that having the flexibility to choose how to use each day’s meals has worked well for you. It’s also wonderful to hear that the health coaching support has helped keep you educated and motivated throughout your experience.
Your kind words about our support team mean a lot. We’re especially happy to know that the guidance during the program and the transition back to a regular diet has been helpful for you. That’s exactly the kind of support we aim to provide.
Thank you again for taking the time to share this thoughtful feedback, it truly means a lot to our team.
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