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.... Ver mais
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Leia as opiniões dos outros
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... Ver mais
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... Ver mais
A empresa respondeu
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... Ver mais
Informações sobre a empresa
Escrito pela empresa
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.
Informações de contacto
Estados Unidos da América
- prolonlife.com
4,1
Bom
10 mil opiniões
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Outstanding experience with Prolon 5…
Outstanding experience with Prolon 5 day FMD and the support from Nicole my support Dietitian. Great quality product. This was my 4th month in a row using FMD and seeing strong results that have me planning to continue to complete FMD monthly.
20 de agosto de 2026
Resposta da Prolonlife
Peter, thank you so much for sharing your experience! We’re happy to hear that your 4th consecutive month with Prolon has been such a positive one and that you’re seeing results that inspire you to continue your FMD journey.
We’ll be sure to pass your kind words along to Nicole as well!
We’re honored to be part of your journey and look forward to supporting you along the way.
Outstanding!
Outstanding!
I considered trying Prolon for months and decided to start with the one day reset. I felt so statiated the whole day, the food was delicious. And best of all, it worked as advertised. My whole system felt rejuvenated the next day. I decided to buy the 5 day program and if that goes as well, I'll move on to the once a month program. I have a very challenging gut and Prolon knew how to deal with it to my utter amazement!
18 de agosto de 2026
Resposta da Prolonlife
Hi Terry, we’re so happy to hear that you decided to give Prolon a try and that your first experience with the 1-Day Reset exceeded your expectations!
It’s wonderful to hear that you enjoyed the food and felt so satisfied throughout the day. We’re especially glad to know that Prolon was a good fit for you despite having a challenging gut.
Thank you for trusting us with your wellness journey, and we’ll be here to support you if you decide to take the next step with the 5-Day FMD
Resposta da Prolonlife
Hi Masako,
We’re so glad to hear that you enjoyed the quality of the ingredients and felt supported throughout your Prolon experience!
It’s also wonderful to know that the coaching and support added value to your journey.
We truly appreciate you choosing Prolon and look forward to being part of your continued wellness journey!
I sent the below email after ordering…
I sent the below email after ordering and got a generic, AI generated response. super-disappointing. Wow. Your checkout process just tricked me into ordering a second unit and it took a last min scramble to edit the order. That was bad business and super sleezy. Please change your checkout process. That kind of thing will wreck your reputation in a heartbeat.
Super-disappointed in Prolon. You guys have been good historically. Hope, for your sake, this was just a blip.
Adam Robinson
Cell: 805-637-3570
18 de agosto de 2026
Resposta da Prolonlife
Hi Adam,
We really appreciate you sharing this feedback with us, especially knowing that you’ve had positive experiences with Prolon in the past. We’re truly sorry that your recent ordering experience left you feeling frustrated and disappointed.
We understand how confusing it would be to feel that an additional item was added during checkout and then have to make a last-minute effort to correct the order. We’re also sorry that the initial response you received did not feel personalized or adequately address your concerns.
We’ve reached out to you directly at customerservice@l-nutra.com to help address and clarify your concerns and work with you toward a resolution. We genuinely want to better understand what happened during checkout and learn how we can make the ordering experience clearer and easier for our customers. Your feedback is important to us, and we’re taking it seriously.
We truly value your past support of Prolon and hope we have the opportunity to rebuild your confidence in us. We look forward to continuing to support you.
Poor service
Poor service, I suspended and cancelled membership, only to receive the box in mail 48hrs later. I was made to search for the acknowledgment emails of the suspension and cancellation in order to try and get a full refund. Very dissatisfied and disappointed, will never use this company again.
12 de agosto de 2026
Resposta da Prolonlife
Hi Imelda,
Thank you for taking the time to share your experience. We’re sincerely sorry for the frustration and disappointment you experienced regarding your subscription and order.
We understand how important it is to feel that your cancellation requests are acknowledged and that you have clear options when an order has already entered processing. Our team has reached out to you directly from customerservice@l-nutra.com to review your concerns and provide clarification regarding your order and the options available.
We truly regret that this experience did not meet your expectations. Our goal is always to provide clear communication and support throughout the subscription and ordering process, and we appreciate the opportunity to address your concerns directly.
Please feel free to respond to our email so we can continue working with you toward the best possible resolution. We’re here to support you.
A Great Experience!
This was the first 5-day Fast-Mimicking Diet from Prolon that I've done. The food (Expanded Variety pack option) was very tasty. Everything about the program was straight-forward and easy to follow. The daily coaching sessions with Tammi really added value to the overall program. I plan to do a 2nd and 3rd one as recommended within a 3-month window based upon the excellent results I experienced in increased energy level, clarity, and overall wellness. Thank you Prolon for making this important process an option to do at home!
27 de julho de 2026
Resposta da Prolonlife
Hi Michelle,
Thank you so much for sharing your experience,
We’re excited to hear that your first Prolon round was easy to follow and that you enjoyed the Expanded Variety option. It’s wonderful to hear that you noticed improvements in your energy, clarity, and overall wellness. We’re also so glad the daily coaching sessions with Tammi added value to your experience!
We look forward to supporting you through your next rounds.
Customer support was great
Customer support was great. She solved my request quickly. Very responsive and helpful.
17 de agosto de 2026
Resposta da Prolonlife
Hi Evalynnh,
Thank you for your kind words!
We’re so happy to hear that our Customer Support Team was able to assist you quickly and make your experience a positive one.
We truly appreciate you taking the time to share your feedback with us!
The great and the not so great
There is high positive, and high negative. On the positive side, Not weight loss, but something much more important. I have more vitality!! My skin looks amazing! My brain is functioning better! Customer service was not great. I have called a few times without a call back, and 1 get a monthly subscription of the fasting shakes. One bag arrived the same month as expiration, next month, I got another bag that had expired ( both dated) April 2026. With what I pay, that is ridiculous. I don't like how there isn't a representative to talk to when needed. They don't make it as easy as it should be to reach customer service! If it were not for that, I would give the product a 6 stars if possible!
17 de agosto de 2026
Resposta da Prolonlife
Hi Anne,
Thank you for taking the time to share such thoughtful and honest feedback. We’re happy to hear about the positive changes you’ve experienced, especially the increased vitality, glowing skin, and improved mental clarity. It’s wonderful to know that you’ve found benefits beyond the number on the scale!
At the same time, we’re truly sorry to hear about your experiences with our customer service and the issues you encountered with the expiration dates on your monthly fasting shakes. We completely understand how frustrating and disappointing that must have been, especially as a recurring customer and given the investment you’ve made in the products.
Your feedback regarding accessibility to our Customer Service Team and the expiration dates has been shared with our team. We’re always working to improve the customer experience and make it easier for our customers to get the support they need when they need it.
We’re grateful for your continued trust in Prolon and for allowing us to hear where we can do better. We hope we can continue providing you with the experience you deserve. Please don’t hesitate to reach out. We’re here for you.
I wasn't as excited about round 2 as I…
I wasn't as excited about round 2 as I was for round 1. It seemed a bit more challenging.
17 de agosto de 2026
Resposta da Prolonlife
Hi Amy,
Thank you for taking the time to share your experience. We truly value your feedback and appreciate you letting us know that your second round felt more challenging than your first.
We understand that each round can feel different, and we’re sorry this experience wasn’t as positive as your first. Our Customer Service Team has reached out to you directly via email from customerservice@l-nutra.com to learn more about your experience and see how we can best support you moving forward.
Your satisfaction is very important to us, and we’re dedicated to making your Prolon experience as smooth and positive as possible. We look forward to hearing from you and having the opportunity to support you further. Please don’t hesitate to reach out. We’re here for you.
Prolon Has Made All The Difference
I had become highly toxic and quite a bit overweight. Nothing worked to help me get on track to eat the way I want to. There are definitely addictions. Prolon 5 day fast is easy to do. I've done it 3 times now (3 months apart), and am steadily improving. I think I'm finally there to actually do the 24 hour fast 3x a week like I've wanted to! I will definately continue the 5 day resets every 3 months! It's wonderful to have finally found something that works and is healthy, too!
24 de julho de 2026
Resposta da Prolonlife
Hi Connie,
Thank you for sharing your Prolon journey with us!
We’re so happy to hear that completing three rounds has helped you build healthier habits and feel more confident in your routine.
It’s wonderful to hear that you’re continuing to find ways to incorporate fasting into your lifestyle.
We’re grateful to be part of your journey and look forward to supporting you through your future resets!
I was really happy with the results
I was really happy with the results. I lost weight, especially around my waist, and reset my eating. I'm eating healthier now. I know that the main reason for the FMD is autophagy, which we can't see, but the results that I can see were fantastic, and I plan to complete another 5 day fast soon.
13 de agosto de 2026
Resposta da Prolonlife
Hi Kirsten,
Thank you for your amazing feedback!
We’re happy to hear that you were happy with your results and that your Prolon round helped you reset you're eating habits and make healthier choices.
We love hearing that you’re already looking forward to your next 5-day fast!
Wishing you continued success on your wellness journey.
As a board certified health and…
As a board certified health and wellness coach I wanted to try this as I periodically do fasts. I would not recommend. The bars and shake taste highly processed, the soups have 8x the amount of healthy sodium levels ( an easy rule of thumb is sodium should be no more than the total calories per serving). I realize this is a fast and they may want to be keeping sodium levels in check but that is still excessive. Many foods are loaded with almonds often as the first ingredient, which is extremely high in oxalates and can form kidney stones over time in those who are at risk. Overall the food tastes either too sweet or too salty and overly processed. One can get close to mimicking this diet on their own by finding foods with a similar ingredients and nutritional information profile. There is nothing unique about these foods.
15 de agosto de 2026
Opinião espontânea
Resposta da Prolonlife
Hi Lisa,
Thank you for taking the time to share your experience with us.
We’re sorry to hear that the taste and overall experience with Prolon did not meet your expectations. We completely understand that taste preferences are highly personal.
We also appreciate the opportunity to provide some additional context around the formulation and the scientific purpose behind its design.
Prolon was created in part to mitigate some of the negative side effects associated with prolonged water fasting, including adherence, dehydration, muscle loss, gallstones, hypotension, hypoglycemia, and nutrient deficiency, while still supporting the benefits associated with fasting, including autophagy. The goal was never simply to create a collection of foods with similar calories or ingredients. Prolon provides a scientifically developed combination of micro-, and macronutrients designed to keep the body nourished while supporting the fasting-like state and avoiding activation of key nutrient-sensing pathways.
We are also very intentional about the ingredients we use. Our formulations include nuts, which are rich in monounsaturated fats; olives, which provide healthy monounsaturated fats and antioxidants; flax seeds, which provide omega-3 fatty acids, fiber, and essential nutrients; vegetables, which provide vitamins, minerals, and dietary fiber; lentils, which provide protein, fiber, and other nutrients; spices to enhance flavor and provide potential health benefits; and prebiotic fiber to support gut health and beneficial gut bacteria.
Regarding the sodium content, sodium is intentionally incorporated into the Prolon formulation as part of the overall nutritional composition of the five-day program. Prolon’s sodium content ranges from approximately 1.6–2 grams per day, and sodium plays an important role in maintaining hydration and electrolyte balance during fasting.
We certainly respect that Prolon may not have been the right fit for your personal preferences. At the same time, we want to make sure our customers have accurate information when making decisions about their health. Prolon’s formulation is the result of extensive research and intentional nutritional design, and we care deeply about both the science behind the program and the quality of the products we provide.
Thank you again for giving Prolon a try and for sharing your perspective. We’re always open to feedback, and we appreciate the opportunity to provide additional context about the program. We have reached out to you in case there is anything else we can support you with. We are here for you.
Will have to wait on product good or bad
It's is like you are trying to trap people in purchasing extra stuff or keep buy every 3 month add ons...
14 de agosto de 2026
Resposta da Prolonlife
Hi Pete,
Thank you for taking the time to share your experience. We truly value your feedback and sincerely apologize if you felt that you were being encouraged or pressured to purchase additional products or continue purchasing on a recurring basis.
We have made note of your feedback and shared it with the correct team to ensure that this is taken into account to improve the experience we provide.
Our Customer Service Team has reached out to you directly via customerservice@l-nutra.com to better understand your concerns and provide any clarification you may need regarding our products and purchasing options.
Your feedback is very important to us, and we appreciate the opportunity to better understand your experience. We hope to hear back from you and have the chance to address your concerns. Please don’t hesitate to reach out. We’re here to support you.
I am really satisfied with Prolon diet…
I am really satisfied with Prolon diet because it helped me to stop cravings for coffee and sugar, and I had lost 11 pounds so far since my first time. At the moment I’m starting my second time of fasting with Prolon 5 days package. I really recommend this product.
12 de agosto de 2026
Resposta da Prolonlife
Hi Gabriela,
Thank you so much for sharing your experience with us. We’re happy to hear that Prolon has helped you with your coffee and sugar cravings and that you’ve been seeing results along your journey.
We’re also excited to hear you’re starting your second round!
Wishing you another wonderful 5-day experience, and thank you for recommending Prolon.
Please, don't ever hesitate to reach out if you have any questions. We are here to support you.
The website had issues on the day I…
The website had issues on the day I tried to order. Despite reaching out to chat, the issue didn't get resolved until I reached out again. The few emails I sent either bounced back (having used the copied support email from your site) or weren't answered.
When I finally did get an answer, the only order solution was via invoice that was $40 more than the stated web price.
12 de agosto de 2026
Resposta da Prolonlife
Hi Katharine,
Thank you for taking the time to share your experience. We truly value your feedback and sincerely apologize for the frustration caused by the website issues, bounced emails, delayed response, and the discrepancy between the website pricing and the invoice you received.
We understand how frustrating it must have been to have to reach out multiple times before getting the support you needed.
Our Customer Service Team has reached out to you directly via customerservice@l-nutra.com to help address your concerns, clarify the pricing discrepancy, and work with you toward a resolution.
Your satisfaction is very important to us, and we appreciate the opportunity to make this right. We hope to hear back from you soon and have the chance to provide the support you deserve. Please don’t hesitate to reach out. We’re here for you.
Well researched product!
Stellar customer service. Products are tasty and easy to prepare. They also often run specials. I always get results!
12 de agosto de 2026
Resposta da Prolonlife
Hi Wilma,
Thank you so much for your wonderful review.
We’re so excited to hear that you’ve had such a positive experience with both Prolon and our customer service.
It’s wonderful to know you enjoy the products and find them easy to prepare.
We truly appreciate your continued trust and support!
The website was not easy to navigate
The website was not easy to navigate. I couldn’t find a complete list of what was in the fasting kit and what the difference packages/flavors were. The only way I found a detailed explanation of the flavors was by taking the quiz. Only then were all the details spelled out.
11 de agosto de 2026
Resposta da Prolonlife
Hi Vincent,
Thank you for taking the time to share this feedback. We’re sorry to hear that you had difficulty navigating the website and finding a complete breakdown of the kit contents, package options, and available flavors.
We completely understand how frustrating it can be to have to take a quiz just to find information that should be easy to access. Your feedback is incredibly valuable, and we’ll be sharing it with our team as we continue working to make the website clearer and easier to navigate.
We truly appreciate you bringing this to our attention and giving us the opportunity to improve the experience for our customers.
I love this program
I love this program. The hardest thing about doing a fast is getting started. It helps to have a structured protocol and support.
The online coaching sessions are invaluable. They make the cost worth it for the product.
I have done 24 rounds. They have kept my weight normal and my general health to be excellent despite being over 70 years old.
10 de agosto de 2026
Resposta da Prolonlife
Hi Ruth,
Thank you so much for sharing your experience with us! We’re especially grateful to hear how much the structure and coaching support have helped you stay consistent throughout your journey.
24 rounds are incredible! It means so much to know that Prolon and our coaching sessions have become a valuable part of your wellness routine and have helped you stay on track with your goals. We’re honored to be part of your journey and truly appreciate your continued trust in Prolon. Here’s to many more healthy rounds ahead!
Please don't hesitate to reach out if you ever have any questions. We are here for you.
I tried to cancel my subscription many…
I tried to cancel my subscription many times but just kept having issues with the website.
10 de agosto de 2026
Resposta da Prolonlife
Hi Heather,
Thank you for taking the time to share your experience. We truly value your feedback and are committed to providing the best possible experience with Prolon.
We’re sorry to hear about the difficulty you experienced while trying to cancel your subscription. We’re glad we were able to cancel your subscription and help manage your account according to your preferences.
Our Customer Service Team has also reached out to you directly from customerservice@l-nutra.com to clarify what happened and work with you toward a resolution.
Your feedback is important to us, and we’re committed to making the process as smooth as possible. We appreciate the opportunity to better support you and look forward to assisting you further.
Responsive Customer Service
Prolon has excellent customer service! They addressed my concern quickly and provided a satifactory solution.
6 de agosto de 2026
Resposta da Prolonlife
Hi Lea,
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 understand that subscription details can sometimes be easy to overlook, and we’re grateful that our system allows us to review the account history and better understand what may have happened. Our goal is to use that information to help find the best way forward for you.
Our Customer Service Team has already reached out to you directly from customerservice@l-nutra.com to help address your concerns, clarify what happened, and work with you toward a resolution.
Thank you for giving us the opportunity to assist you. Your satisfaction is very important to us, and we look forward to hearing from you and having the opportunity to support you further.
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