Prolonged shakes are terrific! I enjoy the berry flavor and add fresh berries often. My energy is sustained through the AM including days I go to 45 minute reformer Pilates class and/or the gym. I... Toon meer
Bedrijf heeft geantwoord
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Lees wat reviewers zeggen
I have done this fast 4 times. The good side is I have lost 4-5 lbs each time, the bad side is it’s truly hell and not because you’re suffering from hunger, but because the taste is so intolerable.... Toon meer
Bedrijf heeft geantwoord
I've used this program several times and have had great success. It's also gotten easier with each fast. Thank you to the Prolon Team for helping me reach my goals in achieving better optimal health.... Toon meer
Bedrijf heeft geantwoord
I never thought I could do a 5 day, even modified fast, but the kit makes it extremely easy, and amazingly I did not feel deprived. The snacks are actually tasty, small, but savorable. I did the soups... Toon meer
Bedrijf heeft geantwoord
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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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.
Site is difficult to navigate
Site is difficult to navigate. It is frustrating when ordering one kit, the algorithm puts the request in as an auto renewal.
26 juni 2026
Antwoord van Prolonlife
Hi Deborah,
Thank you for taking the time to share your feedback with us, and I’m sorry for the frustration you experienced while navigating the site and placing your order. I understand how confusing it can be when an order defaults to an autorenewal setting when that’s not what you intended.
I also want to gently clarify that the website does clearly outline the difference between a one-time purchase and a subscription before checkout, and the selection is made at the time of ordering. However, we absolutely understand that this can still be missed or feel unclear in the moment, and we’re always working on making that distinction even more visible and user-friendly.
If your subscription was selected by accident, please don’t worry. We’re happy to help review your order and make any adjustments needed. You can contact us anytime at customerservice@l-nutra.com, and our team will take care of you directly.
Thank you again for your feedback and for sharing your experience with us, it genuinely helps us improve.
Love all the support
Love all the support. Coaching sessions are great. Appreciate the FB group. Emails responses are prompt.
I've done 6 rounds in the last 13 months. I received a confirmation of the coaching session for the first round but not any of the others. I had to send an email request for the link
26 juni 2026
Antwoord van Prolonlife
Hi Judy,
Thank you so much for taking the time to share your experience, and for your continued trust in completing multiple rounds with Prolon. I’m really glad to hear you’ve found the coaching sessions, email support, and Facebook group helpful.
I also appreciate you bringing the coaching session confirmations to our attention. I’m sorry for the inconsistency you experienced after your first round and for the inconvenience of having to follow up to request the link. I understand how important it is to have those details shared clearly and in a timely way, especially when you’re actively participating in the program.
We’ll make sure this feedback is shared with our team so we can improve the consistency of our coaching communications moving forward.
We truly appreciate your engagement and your commitment over multiple cycles. If there’s ever anything you need or if a session link is missing again, please don’t hesitate to reach out. We’re always here to support you.
Too many emails
I’m looking forward to receiving my order, but I’ve been bombarded with emails and texts AND I’m still getting bombarded with ads!!! I haven’t even received my order yet. You need to refine your online marketing!!!!
24 juni 2026
Antwoord van Prolonlife
Hi Carol,
We’re sorry to hear that you’re feeling overwhelmed by the emails, and we truly appreciate your feedback.
The reason we send these emails is to provide helpful information, tips, and guidance so you can get the most out of your ProLon experience, especially before and during your fast. Our goal is always to ensure you feel supported and well-informed throughout your journey.
That said, we completely understand the importance of choice. Every email we send includes an easy option to unsubscribe if you would prefer not to receive these messages. We fully respect your preferences and want to ensure you feel in control of the information you receive.
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.
good principle bad management
So
why exactly am I receiving the fasting bars that I took out from re-order (basically last shipment went unused) and I do not get the fasting shake that was not delivered last time?
This is not acceptable.
25 juni 2026
Antwoord van Prolonlife
Hi Paolo,
Thank you for taking the time to share your feedback, and I’m sorry for the frustration this situation has caused. I understand how disappointing it must feel to receive items that don’t align with what you were expecting, especially given your previous delivery concerns.
We take situations like this very seriously and would really like the opportunity to look into your order in detail so we can understand exactly what happened and help resolve it for you as quickly as possible.
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.
I am happy with my experience
The food was very pleasant, the result is wonderful. I am definitely planning to do in 2 more times, and then ones every half a year.
22 juni 2026
Antwoord van Prolonlife
Hi Kora,
Thank you so much for taking the time to share your experience. I’m really glad to hear that you found the food pleasant and that you’re happy with the results. That’s wonderful to hear!
It’s especially great to know you’re already planning to repeat the program and incorporate it into your routine moving forward. Staying consistent like that can be a meaningful way to support your long-term goals, and it’s a good reminder of how individual and sustainable this kind of approach can be when it fits well into your lifestyle.
We truly appreciate you sharing your journey with us, and we’re here to support you whenever you decide to continue.
Wishing you continued success as you move forward, and we look forward to being part of your next steps.
The Prolon customer service and support team are amazing!
The customer service and support are second to none! I just submitted a new order yesterday and in less than 24 hours, it has shipped. That's incredible! I absolutely love the Intermittent Fasting Bars variety pack. They really help me stay on track and they taste like I'm having a treat every morning with my coffee. Thank you, Prolon, for helping me reach my health and healthy weight goals!
24 juni 2026
Antwoord van Prolonlife
Hi Cindy,
Thank you so much for your thoughtful review and for sharing your experience with us!
We're happy to hear that your order shipped so quickly and that you've been enjoying our Intermittent Fasting Bars Variety Pack. It's wonderful to know that they've become a satisfying part of your morning routine and are helping you stay on track with your health goals.
Our team works hard to provide exceptional service and support, so your kind words truly mean a lot to us. We're especially grateful to hear that ProLon has been a helpful part of your journey toward improved health and a healthy weight.
Thank you for being a valued member of the ProLon community. We look forward to continuing to support you on your longevity and wellness journey!
Prolon is very easy to deal with
Prolon is very easy to deal with. The website is very easy to navigate and questions are answered very quickly.
23 juni 2026
Antwoord van Prolonlife
Hi Marie,
Thank you so much for your kind words and for taking the time to share your experience!
We're delighted to hear that you found our website easy to navigate and that our team was able to answer your questions quickly. Providing a seamless and supportive experience for our customers is always our goal.
We truly appreciate your feedback and thank you for being part of the Prolon community. Please don't hesitate to reach out if there's ever anything we can do to support you on your health and longevity journey.
My order that got lost was replaced…
My order that got lost was replaced right away. Love the bars!
23 juni 2026
Review zonder uitnodiging
Antwoord van Prolonlife
Hi There,
Thank you so much for taking the time to share your experience!
We're glad our team was able to quickly assist with the replacement and help get everything resolved.
We're also excited to hear you're enjoying the bars! Thank you for being part of the Prolon community, and please don't hesitate to reach out if there's ever anything we can do to support you on your health and longevity journey.
This was my first order
This was my first order, and I look forward to receiving your product. However, you are inundating me with emails. Please scale back on the emails except for the arrival date of my order. I am recovering from heart surgery. Thank you.
22 juni 2026
Antwoord van Prolonlife
Hi Jim,
Thank you for your feedback, and we appreciate you bringing this to our attention.
First and foremost, we wish you a smooth recovery following your heart surgery. We understand that receiving a high volume of emails can feel overwhelming, especially while focusing on your health.
Our intention is always to provide education, guidance, and support throughout the customer journey, but we understand that communication preferences vary. Customers can manage their email preferences at any time by using the unsubscribe link included in our emails.
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.
We appreciate your feedback and will share it with our team as we continually work to improve the customer experience. In the meantime, we hope your order arrives soon and that your recovery continues to go well.
Wishing you all the best on your healing journey.
I just couldn’t find the status of the…
I just couldn’t find the status of the order and date when expect arrival.
22 juni 2026
Antwoord van Prolonlife
Hi Nadia,
Thank you for taking the time to clarify your experience, Nadia.
We sincerely apologize for the frustration caused by not being able to locate your order status or estimated delivery date. We understand how important it is to have visibility into your shipment and know when to expect its arrival.
Our Customer Service Team has reached out to you directly via email from [customerservice@l-nutra.com](mailto:customerservice@l-nutra.com) with additional information regarding your order and tracking details. We are committed to addressing your concerns and ensuring you have the support and information you need.
Your satisfaction is very important to us, and we appreciate the opportunity to assist. We look forward to connecting with you and helping make your experience as smooth and positive as possible.
Antwoord van Prolonlife
Hi Lauren,
I’m really sorry to hear that your experience didn’t meet your expectations. That’s definitely not what we want for any of our customers, and I understand how disappointing that must feel.
We take feedback like this very seriously and would appreciate the opportunity to better understand what happened so we can support you and look into this further.
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.
Thank you for taking the time to share your feedback. It truly helps us improve.
Time to Regroup
Each FMD cycle varies in difficulty, but it’s always a great chance to bring to focus a positive relationship between food and health.
18 juni 2026
Antwoord van Prolonlife
Hi Marybeth,
Thank you so much for sharing your experience with us.
We're delighted to hear that the 5-Day Fasting Mimicking Diet has helped support a more mindful and positive relationship with food and health. We love how you described each cycle as an opportunity to regroup and refocus, as many of our customers find that the program provides not only physical benefits but also valuable insights into their eating habits and overall wellness.
We truly appreciate you being part of the Prolon community and wish you continued success on your health and longevity journey.
Following the 5 day program wasn’t…
Following the 5 day program wasn’t difficult at all. All the meals are prepared for you so there is no guesswork involved. The food was good, and my results were noticeable. Yes, I lost weight and inches, but the best part is I felt great by day 7! I already have cycles 2 and 3 ready and waiting for the succeeding rounds.
15 juni 2026
Antwoord van Prolonlife
Hi Troyanda,
Thank you so much for sharing your experience. We truly appreciate you taking the time to write this.
We’re so glad to hear that the program felt easy to follow and that having everything pre-prepared helped remove any guesswork for you. It’s also wonderful to hear that you enjoyed the food and noticed meaningful results, not just in weight and inches, but also in how great you felt by Day 7.
It’s especially exciting to hear that you’re already planning your next cycles and feel ready to continue your journey. That consistency is where many people see the most lasting benefits over time.
We’re grateful to be part of your wellness routine and wish you continued success with your upcoming rounds.
Prolon is hard to work with and even…
Prolon is hard to work with and even though I changed my subscription date they still charged and sent an order i did not want for 3 more months. I am cancelling my subscription with them.
15 juni 2026
Antwoord van Prolonlife
Hi Beverly,
Thank you for taking the time to share your feedback, and we’re truly sorry to hear about your experience with your subscription.
We understand how frustrating it can be when an order is processed unexpectedly, especially after making changes to your subscription settings. This is not the experience we want for our customers, and we sincerely apologize for the inconvenience this has caused.
We want to reassure you that our Customer Service Team has already reached out directly via email to review what happened with your account and is actively looking into this to work toward a resolution for you.
Your feedback is important to us, and we are continuously working to improve our systems and overall customer experience.
We truly appreciate you bringing this to our attention, and we hope to have the opportunity to restore your trust in the future.
I have done water fasts before and felt…
I have done water fasts before and felt really miserable. I have done 3-5 day fasts before and could not make go number 2 each time, I felt even more sick. I would get sick from it, headache and throw up. I also cannot eat chocolate for many many years because it gave me an immediate headache that I could not remedy. I have been on the 5 day Prolon fast and I was able to eat the chocolate and got NO symptoms at all. I was not hungry. The food was good and I realize my over eating is not because of hunger but stress and boredom. The team were very attentive when I had questions they responded within the hour. I am very grateful for this experience.
14 juni 2026
Antwoord van Prolonlife
Hi Carrie,
Thank you so much for taking the time to share your experience with us. We truly appreciate your openness and are so glad you gave ProLon a try after your previous fasting experiences.
We’re especially happy to hear that this cycle felt very different for you in a positive way—that you were able to complete the 5-day program comfortably, enjoy the food, and even tolerate items that have previously caused you discomfort. It’s also meaningful to hear that you didn’t experience hunger and were able to gain more awareness around your eating patterns and the role stress and boredom may play.
We also really appreciate your kind feedback about our team and the support you received. Being able to respond promptly and be there when you had questions is something we truly value, and it’s wonderful to know that it made a difference in your experience.
We’re very grateful you chose to share this with us, and we’re honored to have been part of such a positive experience for you. Wishing you continued success as you carry these insights forward.
Love Prolon
Love Prolon. I have used this program for years now and always provides the best results. I feel amazing after and to have all the "thinking" taken out of it is great. I just follow the days and with out fail the results are there!
27 april 2026
Antwoord van Prolonlife
Hi Julie,
Thank you so much for taking the time to share your experience, we truly appreciate your continued support over the years.
We’re so glad to hear that Prolon has consistently delivered great results for you and that the simplicity of the program, removing the need to think about planning and meals, has made it even easier to stay on track. It’s wonderful to know you feel amazing after each cycle and that you’ve been able to rely on the program to support your routine so consistently.
We’re grateful to be part of your wellness journey and look forward to continuing to support you in your future cycles.
I need to get the item quickly - I still haven't received it yet
Still haven't received it? It's been way too long. Looking forward to it
10 juni 2026
Antwoord van Prolonlife
Hi Futao,
Thank you for taking the time to reach out and share your experience. We truly understand how frustrating this situation must feel, especially when you are still waiting for your order, and we sincerely apologize for the inconvenience this has caused.
We want to reassure you that our Customer Service Team has already reached out to you directly via email from customerservice@l-nutra.com to help review your order, clarify what happened, and support you in resolving this as quickly as possible.
We completely understand your concern around the delay, and your experience is important to us. We are actively here to assist you and ensure this is addressed properly.
Your satisfaction remains a priority for us, and we are committed to making this right and supporting you through the process.
We look forward to your response and the opportunity to further assist you.
Our team is here to support you every step of the way.
Way too many emails for me.
12 juni 2026
Antwoord van Prolonlife
Hi Annette,
Thank you for your feedback, and we’re sorry to hear that you’re finding our emails overwhelming.
We really appreciate you bringing this to our attention. You can always unsubscribe from our email list by clicking “Unsubscribe” at the bottom of any email. If you are also receiving text messages, you can reply “STOP” to opt out.
Please keep in mind that if you unsubscribe, you may miss helpful updates, including daily tips and guidance during your fast, as well as important information related to group coaching or recorded sessions if you are participating in those programs.
Our goal is to keep you informed, educated, and supported throughout your journey, but we absolutely respect your preferences if you choose to opt out. If you would prefer, you can also contact our Customer Service team at customerservice@l-nutra.com.
Thank you again for your feedback. We truly appreciate it.
Great experience
Great experience! I expected to be hungry but it was very doable and eye opening!
Food was tasty enough.
25 november 2025
Antwoord van Prolonlife
Hi Kam,
Thank you so much for sharing your experience!
We're delighted to hear that the program was more manageable than you expected and that it provided some eye-opening insights along the way. One of our goals is to make fasting more approachable while still supporting the body's natural rejuvenation processes, so it's wonderful to hear that the experience felt doable for you.
We're also glad you enjoyed the food! Thank you for being a part of the Prolon community and for taking the time to leave your feedback.
Wishing you continued health and wellness on your journey!
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