I had a bit of a rollercoaster experience. On the positive side, the results were impressive. I lost 4lbs in the 5 day program. However, the side effects were a challenge. I had severe headaches and n... See more
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This was a professional, beautifully packaged protocol. The 5 day fast was really not difficult, and although I was afraid the food would be hard to get down, it was actually good. I am in love with t... See more
Company replied
I just finished Prolon’s 5-Day kit and honestly, I loved it. The meals felt surprisingly tasty for fasting-mimicking food: the soups were hearty, the bars weren’t chalky, and the nut mixes kept me fro... See more
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4.1
Great
10K reviews
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Great product and great deals
Great product and great deals. I live the bars! They actually taste wonderful—No lie!!
1 April 2026
Reply from Prolonlife
Hi Jonna,
Thank you for sharing your feedback! We’re so glad to hear that you’re enjoying the bars and taking advantage of the great deals.
It’s wonderful to know that the taste exceeded your expectations, our team works hard to create products that are both nutritious and enjoyable, so hearing that you truly love them means a lot to us.
Thank you again for being part of the Prolon community!
Prolon 5-day FMD for Life
I've been regularly using Prolon 5-day FMD for a year, with no plans to stop. As a cancer survivor, healthy nutrition and metabolism are even more crucial and Prolon gives me the tools I need to help my body stay as healthy as possible.
1 April 2026
Unprompted review
Reply from Prolonlife
Hi Mary,
Thank you for taking the time to share your experience with us. We truly appreciate your thoughtful feedback.
We’re honored to hear that the Prolon 5-Day Fasting Mimicking Diet has become a meaningful part of your wellness routine. Many members of our community find the program helpful as a tool to support their overall metabolic health and long-term wellness goals.
Your commitment to prioritizing your health is truly inspiring, and we’re grateful to be part of your journey. Thank you again for your continued trust in Prolon. We’re proud to have you as part of our community.
Quite difficult to figure out content…
Quite difficult to figure out content of kits and flavors.
1 April 2026
Reply from Prolonlife
Hi Dana,
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 you experienced while trying to understand the contents of the kits. We are more than happy to support you by answering your questions and providing any clarification you may need.
Our Customer Service 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 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.
Fast response
1 April 2026
Reply from Prolonlife
Hi Harald,
Thank you for your feedback! We’re glad to hear that you experienced a fast response from our team.
Providing timely support is very important to us, and we’re always here to help make your experience as smooth as possible. We truly appreciate you taking the time to share your experience with the Prolon community.
Easy informative purchase
Easy informative purchase, the website provides clear information about the product and offers easy access to make purchases.
31 March 2026
Reply from Prolonlife
Hi Crystal,
Thank you for taking the time to share your feedback! We’re so glad to hear that you found the purchasing process easy and informative.
Our goal is always to provide clear information and a smooth experience when exploring and purchasing our products, so it’s wonderful to know the website helped make that process simple for you.
We truly appreciate your support and are grateful to have you as part of the Prolon community.
I highly recommend Prolon's products.
I did the five days program so many times, minimum twice a year, usually three or four times a year, my body loves it!!!. I feel great physically, mentally, emotionally. It keeps me balanced.
With my husband and my son we also take the protein, the chocolate and the berries, we subscribed and received ones a months. It make us feel satisfied, but not have heavy, full of energy, easy to digest, great with our skin, and Delicious!!!
I also love the fasting shake, It keeps me full, but focus and with energy all they at work!
We highly recommend their products!
31 March 2026
Reply from Prolonlife
Hi Julieta,
Thank you so much for sharing your experience with us. We truly appreciate you taking the time to leave such thoughtful feedback.
It’s wonderful to hear that the 5-Day Program has become part of your routine and that you’ve found it supportive for your physical, mental, and emotional well-being. Many members of our community describe a similar sense of balance after completing their cycles, and we’re grateful that ProLon has been a positive part of your wellness journey.
We also love hearing that your whole family is enjoying the protein products and fasting shake. It’s great to know they help you feel satisfied, energized, and comfortable throughout the day while still being easy to digest.
Thank you again for your kind words and for recommending our products. We’re truly grateful to have you and your family as part of the Prolon community, and we look forward to continuing to support you on your health journey.
Delivery on time
Delivery on time. I am having difficulty figuring out how to sign up for a group. Also, I was supposed to start tomorrow but re- registered for next Monday. Hope that works.
23 March 2026
Reply from Prolonlife
Hi Michelle,
Thank you for taking the time to share your feedback with us. We truly appreciate hearing from our customers, as it helps us continue improving the experience we provide.
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’re grateful for the opportunity to review your feedback and support you further. Please don’t hesitate to reply to that email if there’s anything additional, we can assist you with. We’re always here to help.
Products based on science
Prolon is a great company that provides products based on scientific research on health & longevity. I discovered prolon after being diagnosed with cancer and truly believe that regular use of their FMD programs have helped to prevent recurrence. Many people are skeptical because they are thinking of this as a weight loss program. That is not what this is for, though it can help with that. The prolon fmd (and their other products as well) provides benefits on a cellular level that increase health and longevity. I recommend that anyone interested read The Longevity Diet by Dr Valter Longo to understand the science behind it!
31 March 2026
Reply from Prolonlife
Hi Mindy,
Thank you for taking the time to share your experience and perspective with us. We truly appreciate your thoughtful feedback and are grateful that you took the time to highlight the science and intention behind the program.
We’re also honored to hear that Prolon has been a meaningful part of your health journey. As you mentioned, the Fasting Mimicking Diet was designed based on decades of research by Dr. Valter Longo and his team, with the goal of supporting metabolic health and cellular renewal processes associated with longevity.
While many people do experience weight-related benefits, the program was indeed developed with a broader focus on supporting overall health at a cellular level.
Your recommendation of The Longevity Diet is a wonderful resource for those who want to better understand the research and philosophy behind the program. Thank you again for your kind words and for being part of the Prolon community. We truly appreciate your support.
Reply from Prolonlife
Hi Richard,
Thank you for sharing your experience with us! We’re so glad to hear about your results.
Many people complete the program hoping to support processes like cellular clean-up (autophagy) while also working toward their wellness and weight goals. It’s wonderful to hear that you experienced weight loss while maintaining your muscle mass, which is one of the key aspects the program was designed to support.
We truly appreciate you taking the time to share your feedback and are grateful to have you as part of the Prolon community.
Not for everyone, and not worth full price.
I tried the five day fast a while back and most of the food was fine, I actually enjoyed a couple of the soups, and absolutely hated a couple. I do wish you could have more control over the flavors and had an option for an equivalent substitution (I hate olives). I ended up feeling really sick by day four and had to stop.
My boyfriend also did it and really enjoyed the fast. He doesn't write reviews, so this is also for his experience. He ended up losing about five pounds. He has done it again recently, and again, enjoyed it. He bought this recent box at a discount and then forgot to cancel the subscription immediately. So while the price with the discount was worth it, the next box coming in at $218 was very much NOT worth it for a five day fast. There is no email or notice that it is about to send the second box, only an email to advise it's on its way and you've been charged the $218. So he is definitely canceling today. We just wish there was some notice it is about to charge you, and that it was $218 for a five day fast. That's very extreme for what you get, and very much not worth it.
I do think he would do it again in the future, but not for anything more than the discount price and I'll be following up with him that he canceled the subscription immediately.
His renewed subscription was from today, his most recent fasting was probably about two months ago. My experience was probably about one year ago.
31 March 2026
Unprompted review
Reply from Prolonlife
Hi Nicole,
Thank you for taking the time to share such thoughtful and detailed feedback about both your experience and your boyfriend’s experience with the program. We truly appreciate your honesty and the opportunity to learn from your perspective.
I’m glad to hear that some of the foods worked well for you and that there were a couple of soups you enjoyed. At the same time, we completely understand that taste preferences can vary, and feedback like yours about having more control over flavors or substitution options, especially for items like olives—is very helpful. We will be sure to share this with our team.
I’m also sorry to hear that you began feeling unwell around Day 4 and had to stop the fast. Each individual can respond differently to fasting, and listening to your body is always the right decision.
It’s great to hear that your boyfriend had a positive experience with the program and enjoyed completing the fast again. We also understand your concerns regarding the subscription renewal and pricing. We know the program can feel like a significant investment, and we truly appreciate your feedback. Our team works hard to keep ProLon accessible while maintaining the quality and benefits supported by over 20 years of scientific research, and we regularly offer promotions to help make the program more affordable.
Thank you again for sharing your experience. If you or your boyfriend ever has questions about subscriptions, promotions, or future orders, please don’t hesitate to reach out. You can contact us anytime at customerservice@l-nutra.com or +1 (888) 926-5370 (Call or Message). We’re always happy to help.
I had the best experience and outcome
I had the best experience and outcome. Lost weight I couldn't lose despite exercising a lot . I haven't gained it back and it's been over a month since I completed it . It reset my metabolism and eating habits
31 March 2026
Reply from Prolonlife
Hi Eliane,
Thank you so much for sharing your experience! We’re really glad to hear that you had such a positive outcome and that the program helped you achieve results that had previously been difficult despite your efforts with exercise.
It’s wonderful to know that the changes have lasted beyond the program and that it helped reset your eating habits as well. Experiences like yours are exactly why many people turn to the program as a way to refocus on their health goals.
We truly appreciate you taking the time to share your journey and are grateful to have you as part of the Prolon community.
I did not place an order for prolon
I did not place an order for prolon. You charged my credit card. I called first thing this morning and told you to cancel it. I do not want your product at this time. If I wanted it, I would’ve ordered it. I resent that you automatically charged my card and placed an order.
31 March 2026
Reply from Prolonlife
Hi Lynn,
Thank you for taking the time to share your experience. We truly value your feedback and sincerely apologize for the inconvenience and frustration this situation may have caused.
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 committed to making your experience as smooth and positive as possible. We appreciate the opportunity to review this with you and ensure everything is handled appropriately.
We look forward to your response and the opportunity to support you further.
Horrible interface on phone
Horrible interface on phone. I had to switch to my laptop and because of that lost connection to my shop account. It ended up getting charged to a card I did not want to use.
31 March 2026
Reply from Prolonlife
Hi William,
Thank you for taking the time to share your feedback, and I’m truly sorry to hear about the frustration you experienced while using the interface on your phone. We understand how inconvenient it can be when switching devices causes interruptions or leads to an unintended payment method being used.
In situations like this, we always recommend reaching out to our team directly so we can help resolve things quickly. You can contact us at +1 (888) 926-5370 (call or text) or by email at customerservice@l-nutra.com
, and we would be more than happy to review the order with you and see what options are available to help correct the situation.
Additionally, your feedback has been shared with our team so it can be taken into consideration as we continue working to improve the mobile experience on our website.
We truly appreciate you bringing this to our attention and look forward to assisting you further.
I have found that using the lose…
I have found that using the lose weight, but don't get that hungry and keep my energy up. It is all laid out for me.
31 March 2026
Reply from Prolonlife
Hi William,
Thank you for sharing your experience! We’re so glad to hear that the program has been helpful for you and that you’ve been able to lose weight while still maintaining your energy and not feeling overly hungry.
It’s wonderful to know that having everything structured and laid out for you made the process easier to follow. We truly appreciate you taking the time to share your feedback and are grateful to have you as part of the Prolon community!
I had a packaging error with…
I had a packaging error with supplements- also I use to get some freebies with orderd -what happened to this???
30 March 2026
Reply from Prolonlife
Hi Gayle,
Thank you for sharing your feedback with us. We truly appreciate you taking the time to let us know about your experience.
We’re sorry to hear that you encountered a packaging issue with the supplements, and we would be happy to look into that further to ensure everything is resolved for you.
Our Customer Service Team has already reached out to you directly via email from customerservice@l-nutra.com
so we can review the details and work toward the best possible resolution.
Regarding the freebies, we occasionally include promotional items or special gifts during certain campaigns or limited-time promotions. These may vary depending on the promotion running at the time of purchase, which is why they may not appear with every order.
We truly value your feedback and the opportunity to support you. Please feel free to reply to our team’s email so we can assist you further.
Revitalize my body
I definitely feel I have more energy. In addition to sleeping more sound.
It was comforting to know I was supported on this journey from their customer service staff.
30 March 2026
Reply from Prolonlife
Hi James,
Thank you so much for sharing your experience! We’re really glad to hear that you’ve been feeling more energetic and sleeping more soundly, that’s wonderful to hear.
It also means a lot to know that you felt supported by our customer service team along the way. Providing guidance and support throughout the journey is very important to us.
We truly appreciate you taking the time to share your feedback and are grateful to have you as part of the Prolon community!
I tried to register but have no…
I tried to register but have no instructions and no bottle?
I thought I would get email instrucyions as I want to start today
23 March 2026
Reply from Prolonlife
Hi Richard,
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 may have caused, especially if you were planning to begin the program today.
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.
Customer service was responsive
Customer service was responsive, both substantively and procedurally.
27 March 2026
Reply from Prolonlife
Hi Ronald,
Thank you for taking the time to share your experience! We’re so glad to hear that our customer service team was able to support you both promptly and thoroughly.
Providing clear, helpful, and responsive assistance is very important to us, and it’s wonderful to know that this was reflected in your experience.
We truly appreciate your feedback and look forward to continuing to support you on your journey with Prolon.
I had canceled this order and my…
I had canceled this order and my subscription. You sent the order anyway. I want to return it and get refunded .
27 March 2026
Reply from Prolonlife
Hi Adrienne,
We are very grateful for your feedback and for the opportunity it provided us to improve your experience.
We’re glad we were able to connect with you directly and work together to review the situation and explore the solutions available in order to achieve the best possible outcome for you.
Please know that we are always here to support you, and we truly appreciate your patience throughout this process.
If you have any additional questions or need anything further, please do not hesitate to reach out—we’re always happy to help.
Reply from Prolonlife
Hi Kathy,
Thank you so much for your kind words! We’re excited to hear that you found our site user-friendly and the ordering process easy. We appreciate your support and look forward to serving you again soon!
Please don't hesitate to reach out if you ever have any questions. We are here for you.
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