The ProLon Fasting Mimicking Diet Review

The ProLon Fasting Mimicking Diet Review

Dietary crazes and trends come and go, but the science that supports some and not others doesn’t fade away. Instead, scientists conduct more research to refute or support many of the health-positive claims made about diets. The ProLon Fasting Mimicking Diet has earned a ton of praise and interest thanks to the science behind the results.

The ProLon Fasting Mimicking Diet is a dietary system that may help individuals lose weight and feel more youthful. It functions similarly to fasting but allows participants to eat small portions of healthy foods. It is a high-fat, moderate-carb, and low-protein diet that lasts five days.

Day 6 summary of my ProLon experience. Visit my YouTube channel to see my entire journey.

Because this diet is still relatively new, we’ll be taking a long hard look at what the ProLon Fasting Mimicking Diet is, how it works, and what it involves. This way, you can make an educated decision about whether or not the ProLon Fasting Mimicking Diet might be right for you.

What Is the ProLon Fasting Mimicking Diet?

The ProLon Fasting Mimicking Diet is a 5-day diet system that incorporates a specific series of pre-measured ingredients and meals to help dieters lose weight while also reinvigorating their entire bodies. As the name likely suggests, this type of diet heavily draws from fasting practices.

But to fully understand how the ProLon Fasting Mimicking Diet works, it’s vital to discuss the person who created it: Dr. Valter Longo.


Dr. Valter Longo is a professor of Gerontology and Biological Sciences. He studies human longevity and has performed extensive research on the effect nutrition has on the human life cycle. Dr. Longo created the Fasting Mimicking Diet while at the University of Southern California.

Interestingly, Dr. Longo offers dozens of Fasting Mimicking Diet recipes and meal ideas for free. This offer ensures that dieters of all incomes can attempt the Fasting Mimicking Diet, with or without a nifty 5-Day Diet Box. Most of these recipes feature simple ingredients that harken back to some of the earliest human-made meals.

Ancient Eating Habits

An excellent way of thinking about the ProLon Fasting Mimicking Diet is to think of it as a paleo-friendly diet. The types of foods that our earliest human ancestors munched on are likely to be found within your 5-Day Diet Box.

Rich oily olives, herbal teas, nutrient-dense leafy greens, and the occasional sea critter are all fair game. That’s because human beings didn’t consume many grains and animal proteins until just about 12,000 years ago.

Until that time, farming and raising livestock simply wasn’t the norm. As a result, the average human likely had little excess body fat and may have been far more robust and leaner than the average modern person.

By recreating and replicating many of our ancestors’ old eating habits, we may be capable of inducing a safe level of intermittent fasting or fasting mimicking. While in this state, the body may burn stored fat more effectively. So long as dieters follow the protocol, muscles will only continue to grow stronger during this process.

Still, Dr. Valter Longo summarizes the ProLon Fasting Mimicking Diet principles by categorizing them into five sections. These sections are referred to as the Five Pillars of Longevity.

The Five Pillars of Longevity

According to Dr. Longo, there are five pillars upon which a healthy and long life must be built. Try to think of these pillars as five distinct legs that help support a beautiful and ornate chair.

This chair is your health, lifespan, and overall well being. When one of the legs begins to falter, the whole chair may come crashing down. Similarly, each of the Five Pillars of Longevity must be practiced concurrently for individuals to reap their fullest benefits.

Though they’re not given direct names in Dr. Longo’s work, we can attempt to summarize them below.


The first pillar describes the relationship between the thing we eat and the way our body functions. Each particle of matter that the body consumes has an unignorable effect on our tissues and vital systems.

For this reason, eating fish with small amounts of mercury can become a fatal habit over time. If mercury didn’t build up in our bodies, it wouldn’t be as significant of a health risk. Similarly, each tiny morsel of food that we choose to ingest contains molecules and fine particles that interact with our bodies to give us energy, help with cellular repair, and generally keep us alive.

By choosing our foods and beverages very carefully, we could potentially influence our bodies to produce individual cells or react in a predictable, desirable manner. This practice includes eating for youth, dieting on specific substances to lower free radicals and increase youthful biological vitality.

This first pillar is an attempt to state and describe this interaction. The second pillar relates to disease and illness.


The second pillar summarily states that diet and disease are related forces. By manipulating and controlling a person’s diet, you may also treat and prevent some types of illness or disease.

Dietary Style

The style in which we eat may influence our overall health and longevity. Those who eat slowly and who only consume what the body needs to survive may live longer lives than those who consistently overeat or fail to enjoy adequate nutrition.


The fourth pillar is a statement concerning the impact that lifestyle has on health, wellbeing, and longevity. Our personal lifestyle choices can, to an extent, define whether we live long and healthy lives or short, painful ones.

Disease Prevention

The final and fifth pillar states that these combined forces can be a useful disease prevention tool. However, the interaction among biological systems and the pillars themselves is a complex one.

How Does the ProLon Fasting Mimicking Diet Work?

The ProLon Fasting Mimicking Diet Works by restricting simple carbohydrates, difficult-to-digest animal proteins, and portion sizes. Combining these factors helps to trigger a fasting-like state that can increase weight loss, decrease inflammation, and improve mood.

When the body enters fasting mode, it begins a process called gluconeogenesis. While in this state, your body will start to burn stored fats. This state can be dangerous when allowed to continue for prolonged periods but can be safe during short bursts.

The ProLon Fasting Mimicking diet is unique in that it isn’t strict fasting. It incorporates much-needed supplemental nutrition while also utilizing natural foods high in healthy fats and complex carbohydrates. There’s also a significant focus on staying hydrated.

Advantages of the ProLon Fasting Mimicking Diet

The ProLon Fasting Mimicking Diet poses several potential benefits. Weight loss is often reported as a positive benefit of the ProLon Diet, though it’s not the only possible advantage. Those who engage in this diet may enjoy:

  • Less belly fat
  • Improved muscle strength
  • Greater convenience
  • Longer life

But how does the ProLon Fasting Mimicking Diet promote these benefits? Let’s explore each one in greater detail to find out.

Less Belly Fat

There’s plenty of scientific evidence to support the idea that intermittent fasting, or the fasting presented with fasting mimicking diets, can help individuals lose weight quickly and safely. The ProLon Fasting Mimicking Diet targets stored fat, allowing it to help minimize abdominal fat.

Improved Muscle Strength

Fasting can wreak havoc on your muscles. Even intermittent fasting can result in noticeable muscle mass reduction. But because the ProLon Fasting Mimicking Diet isn’t full fasting, it can strengthen and tone muscles rather than eating them up.

The vitamins and supplements essential to this diet, coupled with the carbohydrate intake, keep muscles from vanishing during the diet.

Greater Convenience

Unlike other types of diets that arrive half-prepared or require to spend hours laboring over a hot stove, the ProLon Fasting Mimicking Diet comes in a handy box with each day pre-packaged. The only thing you’ll need to complete your box kit is cold and hot water.

Alternatively, recipes for DIY snacks and meals are always simple. The ingredients featured are common, affordable, and easy to incorporate without much preparation. Consequently, every version of the fasting mimicking diet is convenient.

Longer Life

One of the most remarkable and most distinctive advantages of the ProLon Fasting Mimicking Diet is its potential to increase your lifespan. It’s also a potential anti-aging tool, as this type of fasting may slow cognitive decline and help aging bodies retain a more youthful appearance and feel.

Disadvantages of the ProLon Fasting Mimicking Diet

There are two primary disadvantages of the ProLon Fasting Mimicking Diet, and neither have anything to do with how effective the diet is. Instead, the two most common complaints lodged at this diet plan tend to be:

  • It’s Not a Long-Term Option
  • It Can Be Pricey

These complaints are challenging to ignore or refute. The ProLon Fasting Mimicking Diet is designed for short-term engagement and use. It’s a diet that takes place for five days. Each 5-Day Box costs upwards of $200, which also makes this diet option a little pricey.

Not a Long-Term Option

You cannot practice the ProLon Fasting Mimicking Diet every day, each week, forever. It’s a specifically-designed diet meant to be used up to once per month at most. The standard recommended pace is once every three months.

As such, those hoping to adopt the ProLon Fasting Mimicking Diet as a replacement to their standard fare will need to think again. Still, for individuals looking to burn fat more effectively and help elongate their lifespan, the ProLon Fasting Mimicking Diet could be just the thing.

Can Be Pricey

Each 5-Day Box costs over $200, and this equates to almost $50 per day for meals. Consider the small quantities of foodstuffs in each per day box. This diet may be too expensive for some dieters.

This notion is particularly true of those hoping to lose a substantial amount of weight over a rapid period. While the ProLon Fasting Mimicking Diet can help an individual lose several pounds for one week, it’s not meant to be a constant dieting solution.

What Can You Eat on the ProLon Fasting Mimicking Diet?

Understanding what you can and can’t eat while on the ProLon Fasting Mimicking Diet is a relatively straightforward affair. The boxing element of the diet ensures that dieters receive almost precisely what they need for each meal. The only missing component is water.

Still, the principles of fast mimicking diets can be summed into three core parts. To attempt a DIY fasting mimicking diet without purchasing a 5-Day Box, you’ll need to consume:

  • Plenty of healthy plant-based fats
  • Some complex carbohydrates
  • Low amounts of plant-based protein
  • Lots of clean water

A primarily vegan diet with paleo influences tends to work well. That’s because fasting mimicking diets work by imitating the way that early humans ate and survived.

Seafood twice a week and moderate amounts of whole vegetables and grains can help you mimic early humans’ diet and initiate the fasting mimicking process. Naturally, individuals aged 65 or older will post some dietary restrictions and needs.

For example, older individuals may want to increase their protein intake slightly, even when dieting. Fish, eggs, beans, and chickpeas are all excellent options for increasing dietary protein. Still, portions should be small.

Use a balled fist as a primary portion control tool. Each of your meals should be no larger than a balled fist. If you’re consuming healthy foods, but you’re eating moderate or large portions throughout the day, you’re not allowing your body to enter a state of fasting.

One of the best pieces of advice when it comes to trying a DIY fasting mimicking diet is to think of your earliest ancestors. Choose a snack and ask yourself if your earliest human ancestors would have been able to enjoy that food when they were alive. If the answer is no, choose again. Of course, you could keep things simple by selecting the premade 5-Day Box.

What Comes With the 5-Day ProLon Meal Box?

Before you can decide whether the ProLon Fasting Mimicking Diet might be right for you, it’s crucial to examine the types of snacks and meals provided within the 5-Day Box. In general, each box will contain:

  • Soups
  • Tea
  • L-Bar
  • L-Drink
  • Olives
  • Kale Crackers
  • Supplements
  • Water Bottle

The exact type of soups, teas, and L-Bars you receive vary. You can choose between the Original Soup Flavors or the New Soup Flavors, and the other snacks have limited varieties. Let’s explore each item to discover more about how they work as part of the ProLon Diet.


The ProLon soup mixes come in pre-measured pouches that are easy to pour into an oversized mug or small soup bowl, eschewing cans in favor of more convenient and sustainable packaging. Just add water, and voilà, you have soup!

The Original Soup Flavors include:

  • Minestrone
  • Mushroom
  • Vegetable
  • Tomato
  • Vegetable Quinoa

The New Soup Flavors feature other creations such as:

  • Black Bean
  • Spinach with White Bean
  • Butternut Squash
  • Butternut Squash with Quinoa

Interestingly, both options feature a creamy tomato soup mix. The exact types of soup you’ll receive are somewhat random, though it’s rare for dieters to receive only one or two soup types.

As such, you may need to purchase several ProLon Fasting Mimicking Diet 5-Day Boxes to try all of the available soup combinations. Fortunately, you’ll likely be able to try the ProLon teas within a single box set.


You’ll likely receive three different types of tea with your 5-Day Box. Each diet kit includes Hibiscus Tea, Spearmint Tea, and Spearmint Lemon Tea. Dieters are encouraged to drink multiple cups of tea throughout the day, as each per-day box typically contains more than one herbal tea packet.


One of the ProLon 5-Day Box additions that seems to garner the most praise and adoration are the L-Bars. This love may or may not have something to do with the L-Bars nutty, chocolatey, and slightly gooey flavor profile.

This snack is used to help you transition into the ProLon Fasting Mimicking Diet, but it’s also one of the primary sources of carbohydrates throughout the day. As such, many dieters end up looking forward to their daily L-Bar dose.


The ProLon L-Drink is a glycerin substance that you’re meant to mix with water and sip throughout the day. It comes in two flavors, Orange and Tropical Berry. This drink seems to be somewhat hit-and-miss for dieters. You either love it, or you don’t.


Olive oil has gotten a lot of positive press over the years, but olives are just as deserving of some hype. Most of the negative sentiment surrounding them comes from those who don’t enjoy the taste of olives or who find preserved olives too salty.

But olives are full of heart-healthy fats, and they’re low enough in carbs to propel the body into a headlong fasting state. This feature makes them an ideal snack for those attempting a fasting mimicking diet like the ProLon Diet.

Kale Crackers

Kale is known as a superfood, and there’s no wonder why. This leafy green is rich in vitamins and minerals and contains tons of vitamin A, vitamin K, and vitamin C. It’s also an excellent source of manganese, calcium, and copper. Excitingly, kale can become a tasty, crunchy treat when baked.

ProLon Fast’s decision to include kale chips in their 5-Day Box is no surprise. A single kale chip contains about 300 times the vitamin A found in a potato chip and way more iron and vitamin C. But it still packs a crispy, flavorful crunch that leaves the mouth watering for more.


Each ProLon 5-Day Box contains helpful supplements to encourage fast fasting and improved weight loss. The standard included supplement is algae oil, a healthy fat full of omega-3 fatty acids that could help reduce heart health risks while also improving overall health.

Water Bottle

The simple sports water bottle that comes with each box holds approximately 21oz of liquid. When not being used with ProLon tea or L-Drink formulas, you should fill this water bottle with clean, filtered water.

Three servings of water from this bottle equates to one day’s worth of proper hydration. Of course, owners are welcome to drink as much water as they’d like, within safe limits.

Why So Many Fats and Carbs?

In recent years, fats and carbohydrates have gotten a bad rap as macronutrients. This trend has led to some poor widespread dietary choices that have occasionally ended with hospitalization and death. That’s because the body needs fats and carbs. It craves them, and for a good reason.

The human brain is about 60% fat. Our skin is also composed of a delicate layer of fats that protect our organs, muscles, and circulatory system. This layer of fatty deposits also keeps us warm in cold weather and assists with thermoregulation.

Many of the vitamins and minerals that keep our bodies in excellent condition are fat-soluble. That means that they need fats to break down and become usable. A rigorous low-fat diet could hinder vitamin absorption, impact brain functioning, and result in dry, fragile skin.

Carbohydrates are a more complex issue. That’s because there’s a significant difference between how our bodies handle simple and complex carbs. The body transforms simple carbohydrates into quick energy the body can immediately use. But they can sometimes be nutritionally lacking. Table sugar is an excellent example of an everyday simple carb.

Complex carbohydrates are a little more challenging to break down. They give our bodies lasting energy that can help sustain us throughout the day. Whole grains and fruits are a fantastic source of complex carbohydrates. Some complex carbs aren’t as nutrient-rich, but smart shopping can ensure healthier eating.

The body may be made of proteins, but protein alone isn’t enough to keep a body fit. The ProLon Fasting Mimicking Diet relies heavily on healthy fats and carbohydrates due to their natural origins and sourcing and positive effects on the body.

What Can I Expect?

Trying something new is bound to be scary, especially if you’re unprepared for the challenges ahead. Here’s a breakdown of what you might expect with each day of the ProLon Fasting Mimicking Diet to help you ease into the process.

Remember, this is just a summary of possible experiences. Your own experience may differ somewhat from the one described below. The best way to find out how effective this diet is is to try it out for yourself!

Day One

The first day of the ProLon Fasting Mimicking Diet is likely to be one of the highest-calorie days you experience during your 5-Day Box diet. That’s because it’s essential to transition into a period of fasting.

Going “cold turkey” is more akin to traditional fasting methods, and the ProLon method incorporates a gradual fasting mode that is gentler on the body and mind. On the first day, you’ll chow down on L-Bars, soups, crackers, olives, tea, and even a few vitamin supplements.

Overall, you’ll be consuming more than 1,000 calories during this first day. This number will drop down to about 800 calories on the second day.

Day Two

The second day of your diet may feel quite similar to the first day, except that you won’t be eating quite as many treats. However, you’re not likely to experience an immediate drop in energy levels on the second day, thanks to the first day’s high-calorie transitional nature.

Day Three

The halfway mark can be the most challenging point in any diet. At this point, your body has started to burn body fat more rapidly. This change could result in specific food cravings. If your favorite junk food is pizza, you might begin eyeing your delivery menu on day three.

However, if you can enjoy your soup, crackers, tea, and tasty snack bars without too much complaint, you might find yourself feeling a little perkier the next day. Part of the charm of the ProLon Fasting Mimicking Diet is its short-lived nature. If you can make it through five days of box-based eating, you can enjoy the benefits of a research-backed diet.

Day Four

By the time you reach day four, you may notice an increase in energy levels. Specific food cravings may vanish for a while, leaving you feeling refreshed and calm.

This day is a little heavier on the olives and L-Bars, which will keep you feeling energized. The glycerin-based L-Drink for the day may also contribute to a little extra pep in your step.

Day Five

The fifth day is one of the lightest days, though you will be able to snack on an L-Bar in the morning. Be sure to pace yourself for this day, as you may be experiencing extra-intense cravings.

This slight uncomfortableness is to be expected. Avoid excess exercise and stress, and pat yourself on the back for completing the ProLon Fasting Mimicking Diet.

Day Six

While this day technically isn’t part of the diet, as you’re no longer eating from the supplied foods and drinks, it’s crucial to ease yourself back into a more traditional diet after finishing your 5-Day Box.

Light soups, fruit juices, and legumes are easy enough on the stomach to work as fantastic transition foods. Be sure to move slowly toward more decadent ingredients such as dense bread and pasta or protein-rich meats and fish.


Let’s tackle some of the most frequently asked questions concerning the ProLon Fasting Mimicking Diet. If you don’t find your answer below, be sure to contact ProLon Fast for more information.

You could also choose to watch a helpful video on the results of the ProLon diet to learn more about how fasting mimicking affects the body. The bottom line is, if you have questions, there are answers.

How Much Weight Can You Lose on the Fasting Mimicking Diet?

Much like a person’s body type and metabolism, the answer to this question varies. Still, the kind of fasting you’ll engage in by participating in the ProLon Fasting Mimicking Diet has been shown to result in a reduction of body fat.

Consequently, it’s not challenging to assume that most dieters will experience weight loss while on the fasting mimicking diet. One dieting session per quarter or three months could result in about 5lbs of lost weight. Still, results are bound to vary.

How Much Does the ProLon Diet Cost?

There are three pricing options when it comes to the ProLon Fasting Mimicking Diet. You could choose to buy a single 5-Day Box at full price, you could purchase three boxes at once, or you could subscribe and save $25 on each box.

The best option in terms of overall value is either the 3-Box option or the subscribe-and-save box. Each one grants you $25 off the retail price of the single package. Each box sells for $249 unless it’s on sale, so it’s a good idea to invest in the discounted options if you’re eager to try multiple rounds of the ProLon Fasting Mimicking Diet.

Can You Drink Coffee on the Fasting Mimicking Diet?

Generally speaking, no, you’re not supposed to drink coffee while you’re on the ProLon Fasting Mimicking Diet. Apart from clean water, the only things you should be eating or drinking while on this diet are the items that come inside of the 5-Day Diet Box.

Still, ProLon Fast does understand the seriousness of caffeine addiction and withdrawal. If you’re accustomed to drinking a cup of coffee in the morning, you may struggle to enjoy your ProLon Diet experience due to caffeine withdrawal symptoms. Limiting yourself to a single cup of coffee per day may help ease those unpleasant sensations.

How Often Can You Do the Fasting Mimicking Diet?

You can enjoy the ProLon Fasting Mimicking Diet up to once per month. Of course, the precise frequency of your fast-focused diets depends on your current health status. It may be helpful to consult with your physician before attempting the ProLon Fasting Mimicking Diet regularly.

Can I Exercise on ProLon?

Some light exercise, such as slow-paced walking or office work, is safe to perform during a ProLon Fasting Mimicking Diet. However, fasting is typically a period of rest and recovery. Aerobic exercise or moderate exercise could cause injury and be uncomfortable during a fast.

Consequently, it’s probably a good idea to take a week away from the gym while you’re tackling your 5-day diet. This way, the food you’re eating can interact with your body the way it’s meant to.

After all, it’s challenging to treat sunburn if you’re still going outside into the sunshine unprotected. Fasting works similarly. You’re less likely to see positive, restorative results if you’re putting too much strain on your body.


The ProLon Fasting Mimicking Diet is an effective diet option for most individuals hoping to lose weight and rejuvenate their bodies. It features some interesting anti-aging benefits and is an overall safe alternative to riskier, more dramatic diets. Unlike other types of fasting, this diet does incorporate supplements, complex carbohydrates, and healthy fats.

Richard A. Lehman, LMT, CSCS

Compliment Your Body, LLC
1441 Broadway #6087
New York, NY. 10018
(646) 868-8956

Compliment Your Body has been providing corporate chair massage and in-home massage therapy to New York City and the surrounding boroughs since 2004. We are local to New York City and pride ourselves on our team of local therapists. All of our therapists are hand-picked and thoroughly vetted. We don’t hire over the phone, we meet our team on the field.

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Richard A. Lehman, LMT, CSCS, owner and CEO of Compliment Your Body, LLC has over fifteen years of experience in the health and wellness field. During his career he has worked in a multitude of settings, including spas, chiropractic offices, and on the field at IronMan competitions. Richard was hired in 2005 with the United States Tennis Association as a Massage Therapist and provided therapy to the professional athletes at the US Open Tennis Championships from 2005 - 2010. Richard graduated in 2004 from The Swedish Institute College of Health Sciences. He is a National Strength and Conditioning Association Certified Strength and Conditioning Specialist. He also completed the Plant Based Nutrition course at the T. Colin Campbell Center for Nutrition Studies and is a Level 2 Nutrition Coach with Precision Nutrition. Compliment Your Body has been providing corporate / event massage therapy, and in-home massage therapy to New York City and the surrounding boroughs for over fifteen years, and has been the corporate massage provider to the New York Times throughout this time. Commitment, compassion, connection and charity are the pillars of our business. Experience the CYBNYC difference!

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