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
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Ordering process not so great, we will see…
I wanted to use my FSA account to purchase this product. There is no link that they say there is in order to do this. When you email customer service, they just keep sending you the same instructions. However, you cannot follow through with the instructions because the link is no longer there. I also feel with the product this expensive, shipping should be included in the price. I did order the product and I’m waiting for it to come in to see if it’s quality.
April 21, 2026
Reply from Prolonlife
Hi Jacquelyn,
Thank you for taking the time to share your experience, we truly value your feedback.
We sincerely apologize for the frustration and inconvenience you encountered, especially regarding the FSA process and the missing link. We understand how this can be confusing and appreciate you bringing it to our attention.
Our Customer Service Team has reached out to you directly via email from customerservice@l-nutra.com to help clarify the process and work with you toward a resolution. We’re committed to making this as smooth as possible and ensuring you have the guidance needed.
We also appreciate your feedback regarding shipping and will be sure to share it with our team as we continue improving the overall experience.
Your satisfaction is very important to us, and we truly appreciate you giving Prolon a try. We look forward to supporting you further and hope you have a great experience with your order.
Prolon is great
Prolon is so great, I had an issue with the delivery of my package and they gave me an immediate solution. I love the program and will be coming back to it yearly!
June 18, 2025
Reply from Prolonlife
Hi Michelle,
Thank you so much for sharing your experience!
We’re really glad we could quickly resolve the delivery issue and that you felt supported throughout the process. It means a lot to hear that you love the program and plan to come back to it.
We truly appreciate your trust and look forward to supporting you again in the future. If you ever need anything along the way, we’re always here for you.
Great follow up after ordering.
April 21, 2026
Reply from Prolonlife
Hi Nana,
Thank you for your feedback!
We’re really glad to hear you had a positive experience with our follow-up after ordering. Providing timely support and staying connected with our customers is something we truly value.
We appreciate you taking the time to share this, and if you ever need anything, we’re always here for you.
My kit came in good time and was well…
My kit came in good time and was well put together. I appreciate the care with which it’s formulated. Thank you!
April 13, 2026
Reply from Prolonlife
Hi Gary,
Thank you so much for your kind words. We’re really glad to hear your kit arrived on time and that you appreciate the care put into its formulation. That means a lot to our team.
Please, don't ever hesitate to reach out to us if you ever have any questions along your journey, we’re always here to support you.
My order was missed and you made it…
My order was missed and you made it right immediately. Even on a weekend. Your customer service people are amazing, professional and kind!
Thank you - Kathy
April 20, 2026
Reply from Prolonlife
Hi Kathy,
We truly appreciate you sharing this. I’m very glad we were able to resolve your order quickly, even over the weekend.
Our team works hard to be responsive and supportive, and it’s wonderful to hear that came through in your experience.
We would be sharing your wonderful feedback with our team!
Your satisfaction is extremely important to us if you ever need support, we’re always here for you.
They respond to questions quickly
They respond to questions quickly. Great products that work.
April 20, 2026
Reply from Prolonlife
Hi Janet,
Thank you for your feedback. We’re so happy to hear you find our responses helpful and that you’re enjoying the products.
We truly appreciate you taking the time to share your experience, and we’re always here if you need anything along the way.
Thank you for your kindness and quick…
Thank you for your kindness and quick response. You have a great product
April 20, 2026
Reply from Prolonlife
Hi Michael,
Thank you so much for your kind message. We’re really glad to hear you felt supported and that our team was able to respond quickly.
It means a lot to know you’re enjoying the product as well. If you ever need anything, we’re always here for you.
Prolon
Simple instructions on how to use and it works well for men on belly fat. I’ve lost 10 pounds with 2 rounds and getting ready to start my 3rd round.
April 20, 2026
Reply from Prolonlife
Hi Roger,
Thank you for sharing your experience. We’re happy to hear you find the instructions simple and that you’re seeing positive results.
It’s especially great to know you’re continuing with your journey.
If you have any questions as you move into your next round, we’re always here to support you.
Prolon is a great product
Prolon is a great product. Really like the bars and the entire program.
April 20, 2026
Reply from Prolonlife
Hi Carl,
We really appreciate your feedback and your continued support.
It’s wonderful to hear you’re enjoying the program and the bars in particular. Thank you for being part of the Prolon community!
Please, don't hesitate to reach out if at any point you have any questions. We are here for you!
Reply from Prolonlife
Hi!
Thank you for sharing your feedback with us. We are truly grateful for your continued trust and support over the years.
We really appreciate you taking the time to share your experience.
If at some point there’s ever anything you need, we’re always here for you.
Convenient and easy to follow.
The diet was easy enough. It was convenient. Did not like the food; was very gassy and did not agree with my sensitive gut. We lost weight but gained it back. Was hungry most of the time.
September 19, 2025
Reply from Prolonlife
Hi Janet,
Thank you for taking the time to share your experience. we really appreciate your honesty.
I’m sorry to hear that the program didn’t feel like a great fit for you, especially with the digestive discomfort and hunger you experienced. We understand how frustrating that can be, particularly if you have a sensitive gut. Reactions like gas or bloating can sometimes occur due to the increase in fiber and plant-based ingredients, but that doesn’t make it any easier when you’re going through it.
Prolon was created in part to help mitigate some of the challenges associated with water-only fasting, such as dehydration, muscle loss, hypoglycemia, and nutrient deficiencies, while still supporting the body’s fasting processes, including autophagy. The program provides a carefully designed balance of nutrients intended to nourish the body while keeping it in a fasting-like state.
Some of the key ingredients include:
Nuts: rich in heart-healthy monounsaturated fats
Olives: a source of healthy fats and antioxidants
Flax seeds: provide omega-3s, fiber, and essential nutrients
Vegetables: offer vitamins, minerals, and fiber
Lentils: contribute plant-based protein and nutrients
Spices: add flavor and may have anti-inflammatory properties
Prebiotic fiber: supports gut health and beneficial bacteria
There is also research on the Fasting Mimicking Diet showing improvements in markers related to metabolic health, aging, and risk factors such as body weight, blood pressure, and IGF-1 across a wide range of adults.
That said, we completely understand that individual experiences can vary, and your feedback is incredibly valuable to us. If you’re open to it, we’d be happy to explore ways to better support you or discuss whether any adjustments could make the experience more comfortable for you.
We are happy to hear that aside from individual preferences. You found the protocol easy and convenient.
Thank you again for sharing your thoughts. We truly appreciate it.
Reply from Prolonlife
Hi Robert,
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.
I’m very sorry to hear that your order never arrived and that you didn’t receive any follow-up communication, that’s certainly not the experience we want for you, and I understand how frustrating that must feel.
Our Customer Service Team has reached out to you via email from customerservice@l-nutra.com to help investigate what may have happened and work toward a resolution. If you haven’t seen it, we recommend checking your spam or junk folder just in case it was filtered there.
Your satisfaction is very important to us, and we are fully committed to making this right for you as quickly as possible. Please feel free to reply directly to that email or here, and we’ll ensure you receive the support you need.
We truly appreciate your patience and look forward to resolving this for you.
I hate this aspect of it…
I hate when you want to try out a new product and during checkout, you are continually thrown "add-ons" and have to go through many rounds of it until you can finally place your order. It has made me cancel before checkout on other products many times in the past, but I decided to continue with this one, this one time.
April 17, 2026
Reply from Prolonlife
Hi Peggy,
Thank you so much for taking the time to share your experience. We really appreciate the honesty and feedback.
We’re sorry to hear that the checkout process felt overwhelming with the add-on prompts. We completely understand how that can be frustrating, especially when you’re just trying to complete your order smoothly.
Your feedback is very valuable, and we’ve shared it with our team so we can continue improving the checkout experience and make it more streamlined and user-friendly.
We’re really glad you decided to give the product a try this time, and we hope your experience with Prolon itself feels worth it and supportive of your goals.
If there’s anything we can do to help or improve your experience further, please don’t hesitate to reach out. We’re here for you.
Great product love the new organic…
Great product love the new organic option get rid of the toxic tea bags. Would love an option to purchase à la carte soups and lprotein bars
April 6, 2026
Reply from Prolonlife
Hi Diane,
Thank you so much for your kind feedback. We’re really glad to hear you’re enjoying the product and the new organic option!
We also appreciate your thoughtful comment about the tea bags. We’re happy to share more information for transparency: our filter tea bags are made from a blend of natural wood pulp and abaca plant fiber, are oxygen-bleached (no chemicals are used in the sanitizing process), and are completely free from plastics and plasticizers.
They are also FDA-, USDA-, and NOP-approved, as well as biodegradable and compostable. In some cases, slight discoloration can occur in flavored blends due to natural citrus-based flavor absorption in the filter material.
Regarding your interest in purchasing items à la carte, such as soups and L-Protein bars, we truly appreciate the suggestion and will be sharing this feedback with our team for future consideration.
We also want to gently share that the reason we recommend following the program as designed is because the Fasting Mimicking Diet was developed based on extensive research. The specific combination of macronutrients, micronutrients, and ingredients across each of the 5 days is carefully calibrated to avoid strongly activating nutrient-sensing pathways, which is what allows the body to enter the fasting-mimicking state while still receiving nourishment.
For this reason, any modifications to the program are generally not recommended, as the clinical benefits observed were based on adherence to the full protocol as studied.
Thank you again for your support and thoughtful suggestions. We truly appreciate it. If you have any other questions, we’re always here to help.
I love the protein powder most
I love the protein powder most. My favorite of the bars is the chocolate chip.
April 7, 2026
Reply from Prolonlife
Hi Virginia,
Thank you so much for sharing this! We’re excited to hear you’re loving the protein powder, and the chocolate chip bar is definitely a fan favorite
We truly appreciate you taking the time to share your experience, so glad you’re enjoying these parts of the program!
Please, don't hesitate to reach out if you ever have any questions, we are here to support you.
Highly Recommend!
We were pleasantly surprised! We’ve been completing prolonged fasts for years, but we felt miserable and lacked energy during the process and for days afterward. We loved the boost of energy we had during and after the 5-day FMD and how easy the meals were to prepare! We really liked how we were actually able to consume food for all 3 meals a day plus snacks! The best part of our experience has been their customer service who exceeded our expectations. Thank you!
April 14, 2026
Reply from 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 sincerely apologize for the inconvenience and frustration this situation might have caused you.
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.
This is my fourth order from Prolon
This is my fourth order from Prolon. The program is easy to follow and has wonderful results. I had more energy and felt reset.
April 14, 2026
Reply from Prolonlife
Hi Marie,
Thank you so much for your continued trust in Prolon, it truly means a lot to us that this is your fourth order.
We’re so glad to hear that you find the program easy to follow and that you’re experiencing such positive results. Feeling more energized and “reset” is something many people notice, and it’s wonderful to hear that reflected in your experience.
We’re grateful to be a part of your wellness routine and are here to support you every step of the way.
I have tried to cancel this 3 times
I have tried to cancel this 3 times. I am in middle of brain cancer treatment and don't have time to deal with this staff ( 1 want to say crap because it's just one more thing) it will be returned immediately. The company responded wonderfully and have canceled my subscription and we’re able to stop the shipment before I had to return it. I was very grateful.
April 14, 2026
Reply from Prolonlife
Hi Joy,
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.
I’m very sorry to hear about what you’re going through, and I completely understand how frustrating and overwhelming this situation must feel. We sincerely apologize for the inconvenience this has caused you.
We understand that it can be confusing or easy to
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 as quickly as possible.
Your satisfaction is very important to us, and we are dedicated to making this process as smooth and stress-free as we can for you.
We look forward to your response and the opportunity to support you further.
Reply from Prolonlife
Hi Heather,
Thank you for taking the time to share your experience. We truly value your feedback.
I’m very sorry to hear that canceling your subscription felt difficult, that’s certainly not the experience we want for you, and I understand how frustrating that can be.
Our Customer Service Team is here to help and has reached out from customerservice@l-nutra.com to assist with your request and make sure everything is resolved as quickly and smoothly as possible.
For reference, subscriptions can also be managed directly through your customer portal, where you have the option to cancel at any time. That said, we understand this process may not always feel straightforward, and we truly appreciate you bringing this to our attention so we can continue improving.
Your experience is very important to us, and we’re here to support you every step of the way.
5 stars
I do like the next generation 5 day plan. They used to give a sports bottle, but I guess they stopped doing that it was convenient for this plan, but definitely make sure you have a bottle you can mix with before your program. The prolonlife.com website needs some repairs. The website kept crashing on me and the Prolon recommendations quiz does not work. If I was a first time customer I would have never ordered from the website because the site crashing multiple times, but because I’m not a first time customer and I have had a great experience multiple times I must give a 5 star review because I have had a great experience multiple times. Aside from the current state of the website it’s a 5 star experience for me.
April 14, 2026
Reply from Prolonlife
Hi Dino,
Thank you so much for taking the time to share your experience, and for your continued trust in Prolon. It truly means a lot to us that you’ve had such positive experiences over time.
We’re really glad to hear you’re enjoying the Next Generation 5-day program. We also appreciate your note about the bottle, that’s great feedback, and we understand how helpful it was for mixing during the program.
I’m very sorry to hear about the issues you experienced with the website. That’s definitely not the experience we want for anyone, especially for new customers, and we truly appreciate you bringing this to our attention. Your feedback regarding the site crashing and the quiz not working is incredibly valuable, and we’ve shared this with our team so it can be reviewed and improved.
We’re grateful that your overall experience with the program has been a positive one, and we appreciate your patience as we continue to improve all aspects of the experience.
If there’s anything we can support you with, please don’t hesitate to reach out. We’re here for you.
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