Brand overview
What ProLon does well—and where it fits
ProLon is the consumer nutrition brand of L-Nutra, centered on the 5-Day Fasting Mimicking Diet. Its catalog also includes a 1-Day Reset, Fasting Bars, Fasting Shakes, L-Protein, supplements, spreads, and guided programs designed for different fasting and everyday-nutrition use cases.
- Flagship five-day program arrives in clearly labeled daily boxes
- Original, Expanded Variety, and Next Gen menu options address different convenience preferences
- 1-Day Reset provides a shorter structured fasting option
- L-Protein adds a dedicated plant-based product for feeding and recovery windows
- Official pages provide nutrition facts, allergens, program instructions, FAQs, and safety guidance
ProLon product lineup
The 4 standout products in this brand review
These products show how the brand performs across different needs and price points. Each receives its own rating, price reference, strengths, limitations, and offer link.
Best complete program
ProLon 5-Day Fasting Mimicking Diet
by ProLon
Best for: Generally healthy adults who want a complete, pre-portioned five-day program and have reviewed ProLon’s medical-suitability guidance
A five-day, pre-portioned fasting-mimicking program with daily boxes of plant-based soups, bars, snacks, teas, supplements, and L-Drink.
Our review
The 5-Day FMD is the clearest expression of what ProLon sells: a fixed, low-calorie program designed to remove most planning from a prolonged fasting routine. Original, Expanded Variety, and Next Gen menus offer different balances of preparation, flavor variety, and convenience. It is the strongest choice for buyers who specifically want the complete ProLon protocol, but it is also the most expensive and restrictive option.
What stands out
- Five clearly labeled daily boxes reduce planning
- Several menu formats address preparation and flavor preferences
- Plant-based foods, teas, supplements, and instructions are included
- Official nutrition facts and program guidance are easy to access
Keep in mind
- High cost for a five-day food program
- Calorie restriction may bring hunger, fatigue, headache, or lightheadedness
- Not suitable for everyone and may require healthcare guidance
- Tree nuts and possible soy exposure limit suitability for some buyers
- Duration
- 5 days
- Published calories
- About 1,100 on day 1; 700–800 on days 2–5
- Format
- Five pre-portioned daily boxes
- Menu options
- Original, Bold Flavors, Expanded Variety, and Next Gen options may be offered
- Allergen note
- Contains tree nuts; selected items may contain soy
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Best shorter commitment
ProLon 1-Day Reset
by ProLon
Best for: Buyers who want to try a structured one-day fasting routine before considering a longer program
A one-day pre-portioned fasting kit with soups, bars, crackers, olives, tea, hydration blend, and supplement packets.
Our review
The 1-Day Reset is easier to schedule than the five-day program and gives users a fully planned day rather than requiring them to build a low-calorie menu. ProLon positions it for occasional use or non-consecutive fasting days within routines such as 5:2. It still involves substantial calorie restriction and should not be treated as an ordinary meal kit.
What stands out
- Shorter and easier to schedule than the 5-Day FMD
- Complete day of food and supporting items is included
- Useful entry point for people curious about structured fasting
- Several soup and purchase options may be available
Keep in mind
- Still a low-calorie fasting day rather than standard nutrition
- Not recommended on consecutive days or beyond published frequency without guidance
- Nut-based components and honey may not suit all diets
- Intense exercise is not recommended during the program
- Duration
- 1 day
- Published calories
- Approximately 750 total calories
- Typical contents
- 2 soups, 2 bars, crackers, olives, tea, hydration blend, and supplements
- Suggested use
- Occasional or non-consecutive fasting days, including selected 5:2 routines
- Dietary note
- Plant-based, but a nut bar may contain honey
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Best for feeding-window recovery
ProLon L-Protein
by ProLon
Best for: Active users seeking a plant-based protein powder for post-workout, post-fast, or everyday feeding-window nutrition
A plant-based protein powder providing 25 grams of protein per serving in Chocolate and Berry flavors.
Our review
L-Protein is the most relevant ProLon product for buyers focused on regular training and recovery rather than a fasting cycle. It is intended for the feeding window and can be used after a workout, after fasting, or as part of daily nutrition. The formula provides a clear 25-gram protein target, but its premium price and specialized longevity positioning mean shoppers should still compare taste, serving count, amino-acid profile, and cost per serving.
What stands out
- 25 grams of plant-based protein per serving
- Designed for the feeding and recovery window
- Chocolate and Berry flavor options
- Positioned as gluten-free, soy-free, dairy-free, and low in added sugar
Keep in mind
- Not intended for use during the fasting window
- Premium price compared with many plant-protein powders
- Only two main flavor choices
- Buyers should compare serving count and complete ingredient details
- Protein
- 25 g plant-based protein per serving
- Flavors
- Chocolate or Berry
- Use window
- Feeding window; not a fasting-window product
- Suggested use
- Daily, post-workout, post-fast, morning, or travel nutrition
- Dietary positioning
- Plant-based, gluten-free, soy-free, and dairy-free
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Best portable option
ProLon Fasting Bar
by ProLon
Best for: Intermittent fasters and travelers who want a portable, portioned snack from the ProLon system
A box of 12 individually wrapped nut-based bars offered in Chocolate Chip, Coconut Macadamia, Nuts & Honey, and Variety Pack options.
Our review
The Fasting Bar is the simplest ProLon product to carry and use without committing to a full boxed program. It is positioned for one bar during an intermittent-fasting window or as a snack within a balanced routine. The format is convenient, but each bar still contains calories and multiple tree-nut allergens, so buyers should follow the brand's usage instructions rather than treating it as an unlimited fasting food.
What stands out
- Portable and individually wrapped
- Four flavor or variety options
- Straightforward 12-bar box format
- Easier commitment than a full multi-day program
Keep in mind
- Contains almonds, coconut, macadamia nuts, and pecans
- Premium price per bar
- Brand recommends limiting use rather than eating several per day
- Taste and satiety are highly personal
- Box count
- 12 individually wrapped bars
- Flavors
- Chocolate Chip, Coconut Macadamia, Nuts & Honey, or Variety Pack
- Published nutrition
- About 190 calories and 5–6 g plant-based protein per bar, depending on flavor
- Suggested use
- One bar during an intermittent-fasting window or as a snack
- Allergens
- Contains multiple tree nuts and coconut
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The brand-level tradeoffs
Why consider ProLon
- Highly structured program reduces meal planning and portion guesswork
- Broad ecosystem spans prolonged fasting, one-day fasting, snacks, shakes, and protein
- Clear separation between fasting-window and feeding-window products
- Multiple menu and purchase options
- Extensive official education and support resources
Reasons to compare alternatives
- Premium price compared with ordinary meals or basic nutrition products
- Low-calorie fasting programs are not appropriate for everyone
- Several products contain tree nuts and other common allergens
- Subscriptions and promotions can make true recurring cost harder to compare
- Food-return policy is restrictive and may involve disposal or shipping fees
Brand facts at a glance
| Flagship program | Five daily boxes with pre-portioned soups, bars, snacks, teas, supplements, and L-Drink |
|---|---|
| Published calorie structure | Approximately 1,100 calories on day one and 700–800 calories on days two through five |
| Main product groups | 5-Day FMD, 1-Day Reset, intermittent-fasting products, daily protein, supplements, and bundles |
| Medical suitability | People with health conditions or prescription medications are directed to consult a healthcare professional before fasting |
| Shipping positioning | Qualifying continental U.S. orders and selected subscriptions may receive free shipping |
| Returns | Food products generally cannot be returned or exchanged, except under limited policy-approved circumstances |
See Also
Official brand, product, software, sustainability, and support resources.
