ProLon Review 2026: Inside the 5-Day Box on the EU Store
It's Sunday evening, and a slim cardboard box sits on the kitchen counter next to the kettle. Inside are five smaller boxes, each labelled for a single day and packed with soup sachets, nut bars, little packs of olives, kale crackers and a stack of herbal tea. No grocery list, no meal planning — just a printed card that tells you what belongs to Day 1.
That box is the ProLon 5-Day, the signature product from ProLon. This review covers the brand's European store, prolon.eu, where everything is priced in euros. MollyReviews went through the catalog, bundles, prices and published policies in October 2026 so you know exactly what you're paying for.
The Story: From a University Lab to a Genoa Storefront
ProLon credits its program to research at the University of Southern California led by Dr. Valter Longo, and to L-Nutra, which the brand describes as a nutri-tech company. The European shop is run by L-Nutra Italia S.r.l., registered in Genova, Italy, and it ships orders with UPS.
The brand calls its 5-Day kit a "Fasting Mimicking Diet": a plant-based, calorie-restricted meal program meant to be eaten over five consecutive days. In this review we stick to what is in the box, what it costs and how the brand says to use it. We don't make any promises about what it does to your body — that's a conversation for your doctor.
Talk to your doctor before you order. The start commitment ProLon asks shoppers to accept at checkout calls the program a low-calorie diet and says it should not be used by anyone who is pregnant or breastfeeding, or allergic to nuts or other ingredients. People with a diagnosed condition or on prescription medication are asked to use it only with the approval and supervision of a medical professional.
What's Actually in the Box
- Five day-boxes, one per day. According to the brand, they hold plant-based energy bars, soups, snacks such as olives and kale crackers, herbal teas and supplements.
- A meal card. It suggests how to spread each day's items, but the brand says you can eat them in any order — as long as you don't carry food over to the next day.
- A day-6 transition. The FAQ says you move back to normal eating on the sixth day.
- Brand labels: mostly plant-based, gluten-free and non-GMO.
- Soup menus: Original, Variety 2, Variety 3, Variety 4, Next Gen and Next Gen Expanded Variety.
The smaller Reset 1-Day Kit shows the same idea at a glance. Its product page lists a Tomato Soup Mix, a Butternut Squash Soup Mix, L-Bar Choco Crisp and L-Bar Nut bars, an Almonds & Kale Cracker, sea-salt green olives, caffeine-free herbal teas and two food supplements (algal oil DHA and an NR-3 multivitamin) — 765 calories in total, according to the brand.
Shop the ProLon Highlights
A quick look at popular ProLon products and the euro prices we saw on prolon.eu in October 2026.
Prices change often; the brand's site always shows the current price.
The Lineup: Prices on the EU Store
| Product | Price | Who it suits |
|---|---|---|
| ProLon 5-Day — Original, Variety 2 or Variety 3 | €179 (was €199); €169 with Subscribe & Save | First-timers who want the classic menu |
| ProLon 5-Day — Variety 4 | €189 (was €199) | Anyone after a different soup line-up |
| ProLon 5-Day — Next Gen | €249 (was €279) | Shoppers who want the newer menu |
| ProLon 5-Day — Next Gen Expanded Variety | €259 | Those who want the widest flavor mix |
| Reset 1-Day Kit | €39 (was €49); Next Gen versions €44.99 | A one-day kit, positioned by the brand for a 5:2 routine |
| Nutrition Bar (box) | €39 (was €43); single bars €3.99 | Nut-bar fans: Coconut Macadamia, Nuts & Honey, Chocolate Chip |
| Fasting Shake | €59 | Vanilla shake fans — 12 sachets per bag |
| L-Protein | €69 | Plant-protein shake drinkers |
| L-Protein Bar (12 × 45 g) | €48.90 | A box of plant-protein bars |
| ProLon Sport Bottle | €14.90 (was €19.90) | An add-on for tea and water |
5-Day or Reset?
The 5-Day is the full five-box program. The Reset is a single day's worth of food in one box, and at €39 it's a low-cost way to see the soups, bars and crackers before you commit to the bigger kit.
Original or Next Gen?
Both follow the same five-day format; the difference is the menu. Original, Variety 2 and Variety 3 were €179 when we checked, while Next Gen versions cost €249–€259. If you just want to try the format, the Original menu is the lower-cost entry.
Bundles for planners
The Beginner Bundle (€151, listed regular price €188.90) is built around the Reset kit and the Nutrition Bar, and the Intermittent Fasting Bundle (€284.80, listed regular price €356) pairs the 5-Day with the Nutrition Bar and a Reset kit.
Shipping, Returns and Policies
| Policy | What ProLon Europe says |
|---|---|
| Free shipping | On orders from €149 |
| Where it ships | Europe only; the brand also runs national stores (e.g. UK, France, Germany), while prolon.eu serves many other European countries |
| Carrier and timing | UPS; orders ship "within a reasonable time", with no fixed delivery window stated |
| Returns | Unopened boxes within 14 working days of receipt |
| Return costs | Customer pays return shipping; original shipping charges aren't refunded |
| Damaged or incomplete orders | Replaced at no cost after the product is returned |
| Warranty | No separate product warranty is listed (these are food products) |
| Subscriptions | "No Commitments, Cancel Anytime", per the product page |
The return window is short, and opened food isn't covered, so check the soup menu you want before you order.
Pros and Cons
| Pros | Cons |
|---|---|
| Everything for each day is pre-packed in its own box | A premium price for five days of food |
| Several soup menus to choose from | Only unopened boxes can be returned |
| Reset 1-Day Kit lets you sample the format for €39 | You pay return shipping |
| Subscribe & Save takes €10 off each 5-Day | Not suitable for everyone — the brand lists clear exclusions |
| Free shipping from €149 | Shipping is limited to Europe |
| Clear ingredient lists on product pages | No public promo code |
Who Is ProLon For?
- European shoppers who want a pre-portioned, plant-based meal kit and have already talked it through with their doctor.
- Planners who like having every item for the day in one labelled box.
- Curious first-timers who would rather start with a one-day Reset kit.
- Not for anyone the brand excludes: pregnant or breastfeeding people, people allergic to nuts, or anyone with a diagnosed condition or on prescription medication without medical supervision.
How to Save
- Choose Subscribe & Save on the 5-Day — €169 instead of €179 on the Original menu.
- Look at bundles — the Beginner Bundle was €151 against a listed €188.90.
- Grab sale prices — the Reset kit was €39 (was €49) and the Nutrition Bar box €39 (was €43).
- Reach €149 for free shipping; a 5-Day on its own gets you there.
- Check our deals page before you check out.
ProLon FAQ
Which ProLon store is this review about?
The European store at prolon.eu, run by L-Nutra Italia S.r.l. in Genova, Italy. Prices are in euros.
What does the 5-Day include?
Five day-boxes with plant-based bars, soups, snacks such as olives and kale crackers, herbal teas and supplements, plus a meal card, according to the brand.
Can I return a ProLon box?
Unopened boxes can be returned within 14 working days of receipt. You pay the return shipping, and shipping charges aren't refunded.
Should I check with a doctor first?
Yes. ProLon describes the 5-Day as a low-calorie diet and lists people who shouldn't use it without medical approval. Talk to your doctor before you start.
Our Verdict
ProLon's European store sells a tidy, pre-packed product: five labelled boxes of soups, bars, crackers, olives and teas, with a clear menu card and several flavor line-ups. It isn't cheap, the return rules are strict, and it is only for people who have checked with their doctor. If that's you, start with the Reset kit or the Original 5-Day, use Subscribe & Save, and check our ProLon deals page before you order.
How we wrote this: MollyReviews researched ProLon using its official European website (prolon.eu), product listings, prices and policies in October 2026. We haven't personally tested these products, we don't give medical advice, and we don't invent ratings or discount codes. We may earn a commission if you buy through our links, at no extra cost to you.