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Beauty & Well-being

Prolonlife

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201 reviews

4.2201 reviews
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About Prolonlife

Data updated
Website
prolonlife.com
Category
Beauty & Well-being
Location
United States
Status
Unclaimed
Last 12 months
201 reviews
Replies to negative
97% (31/32)
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About this business

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.

Written by the business, not verified by us.

Is Prolonlife legit?

Prolonlife (prolonlife.com) has a 4.2 out of 5 rating on OK.one, based on 201 user reviews collected here. It is listed under Beauty & Well-being and its reputation is good. 77% of reviews are 4 stars or higher and 8% are 1 star; The business has replied to 97% of negative reviews; Reviews mostly discuss Product, Quality, User experience. Last updated 2026-08-12.

What reviewers say

AI generated

Reviewers had a great experience with this company. Customers frequently highlight the exceptional quality and delicious taste of the products, noting that the structured daily routines make fasting surprisingly satisfying and easy to follow. Consumers consistently praise the professional guidance and responsive customer service representatives who quickly resolve questions and assist with purchases. However, some reviewers were not happy with ordering complications, mentioning unexpected subscription renewals and difficulties managing automated shipments. A few other people also felt that certain food flavors were unappealing or grainy, while others reported frustrating shipping delays. Some individuals additionally experienced missing components in their delivered kits or found specific snack items difficult to enjoy.

Auto-generated from all reviews of this business. For reference only.

What people say

Great Product!

The online ordering experience was easy and all my questions were answered. The package shipped and arrived quickly. When it arrived, it was beautifully packaged with everything I needed to be successful. Daily tips and encouragement were sent explaining what to expect and how I would feel. I'm on Day 3 and this has been easy. I didn't believe I could feel more energized but I definitely do.

Reply from Prolonlife2026-05-26

Hi Michelle, Thank you so much for sharing your experience with us! We are happy to hear that the ordering process felt smooth and supportive from the very beginning, and that your kit arrived quickly and beautifully packaged. It’s especially wonderful to hear that you’re already feeling more energized by Day 3 and that the program has felt easier than expected. That is such encouraging feedback, and we’re so happy the daily guidance and support emails have been helping you feel prepared and confident throughout the process. You are doing an amazing job, and we’re excited for you to continue experiencing the benefits of the program. Thank you again for trusting us to be part of your wellness journey!

Fabulous anti inflammatory & mental clarity!

I have appreciated the ease of including 'fasting' in my full schedule. My joint stiffness always goes away. My eyes look healthier. Using Prolon's 5 day system & 1 day packs have helped me push past fat loss plateaus! I plan to continue to use Prolon products regularly. Thank you for the Research and creation. Very grateful!

Reply from Prolonlife2026-05-22

Hi Janette, Thank you so much for sharing your experience with us! We’re truly grateful to hear how seamlessly Prolon has fit into your busy schedule and how supported you’ve felt throughout your wellness journey. It’s especially wonderful to hear that you’ve noticed improvements in your joint stiffness, overall appearance, and success pushing through fat loss plateaus with both the 5-Day Program and the 1-Day Reset packs. We love hearing how customers are able to incorporate the program into a sustainable long-term lifestyle. Thank you as well for recognizing the years of research and care behind the development of Prolon. Feedback like yours means so much to our team and continues to inspire the work we do every day. We’re incredibly grateful to have you as part of the Prolon community and look forward to continuing to support you on your longevity and wellness journey!

Blood tests show the effectiveness of…

Blood tests show the effectiveness of the 5 day FMD.

Reply from Prolonlife2026-05-26

Hi Lisa, Thank you so much for sharing this! We’re truly happy to hear that you’ve seen measurable results reflected in your bloodwork. Seeing those kinds of changes can be incredibly encouraging and is exactly why so much research and care has gone into the development of the Fasting Mimicking Diet. We’re grateful to have you as part of the Prolon community and appreciate you trusting us to be part of your health and longevity journey. Wishing you continued success and wellness moving forward!

Excellent products

Easy to understand and make great choices. All the products are delicious and keep me satisfied.

Reply from Prolonlife2026-05-20

Hi Laurie, Thank you so much for your wonderful feedback! We’re happy to hear that you found the program easy to follow and that the products helped keep you satisfied throughout your journey. Making healthy choices feel approachable, enjoyable, and sustainable is exactly what we strive for. We truly appreciate your support and are so grateful to be part of your wellness journey!

Great products and fast shipping.

Reply from Prolonlife2026-05-20

Hi Pat, Thank you so much for your kind words! We’re so happy to hear you’re enjoying the products and had a great shipping experience as well. We truly appreciate your support and are grateful to be part of your wellness journey! Please don't hesitate to reach out if you ever have any questions. We are here for you.

I feel amazing on this program.

I feel amazing on this program. This is my 2nd time to do it. It makes my body feel so clean. I would like to do it 3 times a year.

Reply from Prolonlife2026-05-19

Hi Leslie, Thank you so much for sharing your experience with us! We’re so happy to hear that you’re feeling amazing on the program and that this is already your second ProLon cycle. Many customers describe a similar feeling of reset and rejuvenation after completing the 5-day fast, and it’s wonderful to hear it has been such a positive experience for you. Completing the program a few times per year can be a great way to support long-term wellness and healthy lifestyle habits. We truly appreciate you being part of the Prolon community and look forward to supporting you on your longevity journey!

very easy to connect and clear

Reply from Prolonlife2026-05-19

Hi Kathryn, Thank you so much for your kind words! We’re so happy to hear that your experience felt easy, clear, and supportive. Making sure our community feels informed and connected throughout their wellness journey is incredibly important to us. We truly appreciate your support and look forward to continuing to be part of your longevity journey!

The taste of the ingredients in the kit…

The taste of the ingredients in the kit was very good. It made it possible for me to get through the full 5 days with quite ease.

Reply from Prolonlife2026-05-18

Hi Candis, Thank you so much for sharing your experience! We’re so happy to hear that you enjoyed the taste of the foods included in the kit and that it helped make the 5-day program feel much easier to complete. Creating a fasting-mimicking program that is both scientifically designed and enjoyable to follow is very important to us. We truly appreciate your support and are grateful to be part of your wellness journey!

The product is great

The product is great. The support is great. The attention to details is great. Makes it much easier to endure the five days of fasting 🙏🏼

Reply from Prolonlife2026-05-18

Hi Lia, Thank you so much for your kind words and thoughtful feedback! We’re so happy to hear that you’ve had a great experience not only with the product, but also with the support and care provided along the way. We know the 5-day journey can be challenging at times, so it means a lot to hear that the program and guidance helped make the experience more manageable for you. We truly appreciate your support and are grateful to be part of your wellness journey!

Excellent Customer Service

Very pleased with the product, the company and their customer service

Reply from Prolonlife2026-05-18

Hi Kathleen, Thank you so much for your thoughtful review! We’re truly happy to hear that you’ve been pleased not only with the product, but also with our team and customer service experience. Providing support and helping our customers feel cared for throughout their wellness journey is incredibly important to us. We truly appreciate your support and look forward to continuing to be part of your health journey!

Love the new organic version

Love the new organic version! Flavor profile and quality of the ready made soups are hands down a solid upgrade. I did however think more things were going to be upgraded. Would love to see a new/different flavor/style L-bar throughout the days, since it is an every day item. Love the kale almond crackers. Never loved olives until these!! Choco crisp is a nice sweet treat! This is the first fast I’ve ever done and I’m so happy with it. Have done it 3X. Look forward to maintaining the feeling with the subscription.

Reply from Prolonlife2026-05-19

Hi Barbara, Thank you so much for your thoughtful and detailed feedback! We’re so happy to hear how much you’ve been enjoying the new organic ready-to-eat soups and that the updated flavor profile and quality felt like a meaningful upgrade for you. We also truly appreciate your suggestions regarding additional variety for the L-Bars. Feedback like this is incredibly valuable, and we’re always listening to ways we can continue improving the experience while maintaining the integrity of the fasting-mimicking program. It made us smile to hear that the olives won you over and that the Choco Crisp became a favorite sweet treat! And most importantly, we’re thrilled to hear that this has been such a positive fasting experience for you, especially as your first fast ever. Completing the program 3 times is an amazing accomplishment, and we’re honored to continue supporting you through your wellness journey. Please don't hesitate to reach out if you have any question in the future. We are more than happy to support you.

This fast was excellent

This fast was excellent. I didn't love all of the foods, but the quality was there. It definitely helped me reset and get on track in order to get my GLP-1 journey going. I really liked having a fast that you actually eat foods with! Much more doable.

Reply from Prolonlife2026-05-15

Hi Tee, Thank you so much for taking the time to share your experience with us. We’re so happy to hear that the program helped you feel reset and supported you in getting back on track with your wellness goals and GLP-1 journey. We completely understand that not every food item may be everyone’s favorite, so we truly appreciate your openness and thoughtful feedback regarding the meals. We’re very glad to hear that you still felt the quality of the program and found the fasting experience much more doable while still being able to nourish your body with carefully designed foods throughout the process. Our goal is always to create a fasting experience that feels both effective and sustainable, while helping support individuals on their unique health journeys, so it’s wonderful to hear this resonated with you. Please don’t hesitate to reach out if you ever have any questions or need additional support. We’re here for you.

Fabulous products

Fabulous products, delivers as advertised, wonderful customer support. I’ve been with Prolon on/off for many years & they never disappoint.

Reply from Prolonlife2026-05-15

Hi Sabrina, Thank you so much for sharing your experience with Prolon. We’re truly grateful for your continued support over the years and so glad to hear that the products, delivery, and customer support have consistently met your expectations. It means a lot to have you as part of our community, especially as someone who has trusted us on and off for many years. We look forward to continuing to support you on your wellness journey. Please don’t hesitate to reach out if you ever have any questions. We’re here for you.

Very quick and effective customer service…

Norma was so quick to help me correct an address mistake that I made during the ordering process. The order with the updated address was shipped and a notification was sent within 24 hours. Thank you!

Reply from Prolonlife2026-05-18

Hi Mary, Thank you so much for taking the time to share this with us. We’re so glad to hear Norma was able to assist you quickly and help correct the address issue right away. It’s wonderful to know the updated order was processed and shipped promptly so everything could get back on track smoothly. We’ll be sure to pass along your kind words to Norma, she’ll truly appreciate it. Thank you again for your support, and we hope you enjoy your order!

A good easy to follow weight loss tool…

Loved how the program was individually packaged by day and very easy to follow. It really did seem to burn fat as advertised and two months later I have kept off the 5 pounds I lost. I feel it did reset my metabolism, as I struggled to lose weight no matter what I did previously.

Reply from Prolonlife2026-05-15

Hi Laura, Thank you so much for sharing your experience with us. We’re thrilled to hear that you found the program easy to follow and that the daily packaging helped make the experience feel simple and organized throughout your fast. We’re also very happy to hear that you experienced lasting results and have been able to maintain the weight loss even months later. It’s incredibly encouraging to hear that the program helped you feel more reset after previously struggling to see progress despite your efforts. Our goal is always to provide a science-backed program that supports metabolic health, wellness, and sustainable habits, so feedback like yours truly means a lot to our team. Please don’t hesitate to reach out if you ever have any questions or need additional support. We’re here for you.

Easy to order with great products

Reply from Prolonlife2026-05-15

Hi Todd, Thank you so much for your kind feedback. We’re very happy to hear that you found the ordering process easy and that you enjoyed the products. Our team works hard to create a smooth experience from start to finish, so it truly means a lot to hear that reflected in your experience with us. Please don’t hesitate to reach out if you ever have any questions or need additional support. We’re here for you.

Great Taste.

Reply from Prolonlife2026-05-15

Hi Raman, Thank you so much for your feedback. We’re so happy to hear that you enjoyed the taste of the program. Our team works very hard to create products that are both scientifically designed and enjoyable to incorporate into your wellness journey, so it truly means a lot to hear this. We’re here whenever you need guidance or support, don’t hesitate to contact us.

ordering went smoothly this time

ordering went smoothly this time. ty

Reply from Prolonlife2026-05-15

Hi Rosemarie, Thank you so much for sharing your feedback with us. We’re very happy to hear that your ordering experience went smoothly this time and that everything worked well for you. We truly appreciate your continued support and are grateful to be part of your wellness journey. Please don’t hesitate to reach out if you ever have any questions or need additional support. We’re here for you.

Website NOT user friendly

Website and making a purchase is very confusing. I sent a email to customer service and have still not heard by 3 days later.

Reply from Prolonlife2026-05-14

Hi Andrew, Thank you for sharing your feedback with us, and we’re very sorry to hear that the website and purchasing process felt confusing. We completely understand how frustrating that experience can be, especially when you are also waiting for support. We wanted to mention that our team has attempted to reach you multiple times to assist in resolving your concerns. If there may have been any communication issues or if our responses did not come through successfully, we would highly encourage contacting us directly through any of the channels below so we can better support you. Main Prolon Number: +1 (888) 926-5370 or [email protected] Also, we have shared your comments with our internal team so we can continue improving the website experience and help prevent these types of challenges moving forward. Thank you again for bringing this to our attention. We truly look forward to supporting you further and helping make your experience smoother. Please don’t hesitate to reach back out. We are here for you.

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