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Variety Fasting Bar, Reset, L-Protein, L-Spread
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Prolon 5-Day Fasting Mimicking Program
5-day kit
A patented, science-backed program that keeps your body in a fasting state while allowing you to eat nourishing foods. Over five days, your body is rejuvenated at the cellular level, supporting longevity and unlocking powerful health benefits including:
Fat loss with muscle protection
Fat loss with muscle protection
Cellular rejuvenation
Cellular rejuvenation
Improved relationship with food
Improved relationship with food
Renewed energy and mental clarity
Renewed energy and mental clarity
A complete body reset
A complete body reset
With Prolon, you get everything you need pre-packaged and ready to go. Each kit comes with five boxes which are labeled by day so you know what to eat each day.
✓ Fat-focused weight loss
✓ Fat-focused weight loss
✓ Fat-focused weight loss
✓ Fat-focused weight loss
ADD THE ESSENTIALS:

Healthy Aging
Cellular Rejuvenation
Metabolic Support
Fat-focused Weight Loss
Protect Lean Muscle
Changed Relationship with Food
More Energy
Mental Clarity
Rejuvenated Skin

4.4 / 5.0
4.4 out of 5 stars
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This product is rated 4.4 out of 5 stars.
5 out of 5 stars
I expected to be hungry and then HANGRY, on this program. I was extremely surprised by the fact that not only was I NOT hungry, I also didn't crave my usual nightcap. I really didn't have any cravings for the most part, of course smelling the food I was cooking for my family smells good, but I didn't feel like I NEEDED to eat it. Which was one of the main reasons I wanted to try this program. I enjoyed the food. I did NOT like the drink we had to sip on. The flavor was just not my jam. But other than that I have been pleased with how I feel. I work very hard for a living and I usually need a bit more to eat during the day, NOT this week.
5 out of 5 stars
This was my 10th Prolon fast. I used this one to reset myself due to having long COVID. I can't begin to describe how much better I feel after doing a prolon fast
5 out of 5 stars
This is my second time using Prolon. It is so easy to follow and stay on the fasting plan for better health. I lost 6 pounds at the end of five days. I feel great. My bpm dropped 5 points and My anxiety level is nonexistent.
5 out of 5 stars
This is my third time trying the fast mimicking diet, and I have learned to go back to it whenever I need a reset. I tend to do great at watching what I eat for a period of time, but then start slipping back into old habits over time. At that point, I find that if I do the fast mimicking diet again, it really does reset my thinking about how much I need to eat. Basically if I can get by on 700 to 800 cal per day for five days during the diet, then I can easily bump that up two maybe 1200 calories per day, and keep that going for an extended period of time, once the diet is over.
5 out of 5 stars
Prolon leaves the guesswork out of fasting! The system is super easy to follow and even includes a transition day diet. I always feel great during day and have high energy. I sleep so deep! I love that Prolon makes it so simple to take care of my body on a cellular level... thank you Prolon! Kimberley
5 out of 5 stars
I am on a journey to create better health, ProLon was my attempt to reset my body after eating and drinking too many garbage foods. I fasted from 10/2 - 10/6. The fast was easy to follow, The food was surprisingly delicious; I never felt hungry or craved any junk foods and wasn't even tempted by foods on tv commercials. My favorite days were the days with the olives. Definitely ready for month 2 and 3 when the time comes. Oh yeah, I lost 8.2 lbs in 5 days.
5 out of 5 stars
I had such a great experience! Food was great. I had a lot of energy and slept well. I also lost 5 lbs which has been so hard to do! I'll definitely do Prolon again and have recommended it to friends.
5 out of 5 stars
ProLon changed my life. I saw significant results on day three of the 5 day program. It teaches you how to eat and more importantly how you are supposed to feel when you are eating healthy. It has inspired me continue with this journey towards maintaining my health and well-being.
5 out of 5 stars
Clear and easy to follow instructions. Food was better than expected The Fastination FB page was helpful and encouraging.
5 out of 5 stars
I've done a few therapeutic water fasts over the years and I absolutely hated every minute. I've always had the most miserable time ever. Prolon fasting however is a game changer. Yes it's hard, but there are those times every day that you know you are going to eat!! Follow the "instructions" for the soups and they shouldn't be hard or gritty (some need stove top cooking for 15 mins). I am lucky that I enjoy olives, the crackers and the nut bars were delicious, it's food after all : ) I have just completed round 3. It really does get easier with each round. My one criticism - the beautiful packaging and plastic bottle are completely unnecessary. I think Prolon should scale that down a bit. THANK YOU Prof Longo for the decades of hard work and study.
5 out of 5 stars
I was expecting to be hungry, but was pleasantly surprised. By drinking water through out the day and hot herbal tea in the evening I was not hungry. The L-drink flavors were delicious. I had been feeling really bloated, at the end of day 2, it subsided and was gone by day 4. Thank you for making this wonderful product.
5 out of 5 stars
I really liked this fast. It was easy to follow and took the planning out of my day. I wasn't really hungry and it made me realize how much mindless eating I was doing. I felt great by the end of day 3!
5 out of 5 stars
This is a beautifully organized package. The support is awesome as well. The best fast that I have ever experienced. I am not hungry.
5 out of 5 stars
A friend recommended ProLon fasting program to me. This was my first fast. My goal was to reduce stomach inflammation and improve overall gut health. The program is well laid out & easy to follow. I viewed it as a well deserved investment in "me" ProLon did not disappoint, I have more energy, feel great & plan to continue down the path of healthier eating behavior for years to come.
5 out of 5 stars
I received the Prolon kit right away after ordering. I'm on my 5th day of the fast and I feel great. I never really experienced any hunger, and I've already ordered another kit to use in a few months. I feel like after years of being unsuccessful with yo-yo DIETING I am now on my way to achieving not only the weight loss I've been longing for, but I'm on my way to much better health via great nutrition and exercise. Thank you, Dr. Longo and your team for all your hard work!!! What a wonderful product! I bought the Longevity Diet book and the recipe book is on its way to me!! Thank you so much!!
5 out of 5 stars
it is a hard program but it works. I would not lie, I cannot believe I completed it. I lost 6 pounds and feel really amazing. I will continue with a modified Keto program moving forward
5 out of 5 stars
This was a great experience! I feel amazing, and have so much energy and focus. The food tastes great! I've already recommended to all my friends.
5 out of 5 stars
This was an amazing experience for me. During the "fast" I felt energized and was rarely hungry. I was so excited to increase my deep sleep each night reaching 2h53m, when my typical deep sleep clocks in at 45m. I would highly recommend this program!
5 out of 5 stars
The easiest way to drop 4 kilos. Was never hungry. Of course you have not signed up to a gourmet week but with the weight loss in mind fine it's very palatable Well done prolon! Go go go
The amazing part about ProLon is it can easily fit into your lifestylle and is only a 5 day change to your normal life.
Suggested consumption by Dr. Valter Longo, head of the Longevity Institute at University of Southern California and Author of the Longevity Diet.
• If you have a health or metabolic objective in mind and want to achieve faster the metabolic and rejuvenative successes of ProLon, then you can do ProLon every month for 3 or 4 months and then do it once every 3 months to maintain the benefits.
• 2 times only per year for Healthy Aging (10 days out of 365 days!)
• 3 times per year for Healthy Aging and added Weight Loss (15 days out of 365 days!)
Some people do ProLon once a month for reasons that are in line with therapeutic effects of fasting that we are also researching and will launch under a dietitian guided program in 2023.
The diet should be used for five consecutive days, after which the individual will transition on the 6th day and then resume their normal diet. The program provides a meal card that recommends how to consume the items for each day, but each day’s items can be consumed in any order you wish, as long as you only eat each day’s items during that day (do not carry them over to the next).
While there are many different signaling factors in the “nutrient-sensing pathways” involved with cellular fasting, the 3 primary nutrient-sensing pathways that ProLon and fasting down-regulate are IGF-1, mTOR, and PKA. The process is complex, and each pathway can interact with other pathways, but in general, PKA responds primarily to sugar and carbohydrates, while IGF-1 is primarily responsive to protein (and more strongly triggered by animal protein), and mTOR is triggered by IGF-1 and amino acids. Sugar and carbohydrates (and to some extent caffeine) will activate PKA. These nutrient-sensing pathways all help regulate the cells’ growth cycles and stress-resistant “fasting” state.
ProLon provides the body with a scientifically developed, naturally occurring combination of macronutrients (fats, carbohydrates, proteins) and micronutrients (essential vitamins and minerals) designed to keep the body nourished while going through the rejuvenating process of the fasting state.
WHAT HAPPENS ON DAYS 1 TO 5 ON MY PROLON FAST?
Day 1: Transforming to a Fasting State: Your body is transitioning to a fasting state and fat- burning mode, and begins preparation for cellular clean-up.
Day 2: Fat Burning & Ketogenesis: Fast Burning & Ketogenesis: Fast-Burning ramps up, contributing to the initiation of ketogenesis (ketone production). By the end of this day (48 hours), ketosis may occur.
Day 3: Autophagy Clean Up State: Cellular clean-up (autophagy) Fat-burning and ketone production/utilization continues and increases.
Day 4: Cellular Rejuvenation:Cellular cleaning/renewal & fat-burning You’re in the final stretch.
Day 5: Renewal & Change: Fast completed, cellular renewal continues beyond Day 5.
While the purpose of the ProLon diet is to trigger rejuvenation, weight loss may occur. Everyone is different, and weight loss depends on a number of factors. In a clinical study of participants who completed a 5-day ProLon cycle once a month for three months, the average weight loss at the end of the study was about 5.7 pounds. This was primarily abdominal fat, while lean body mass was preserved.
Day 1 has about 1100 calories (kcals), while Days 2-5 have between 700 and 800 calories (kcals) per day.