★★★★★ 4.4 Stars
25+ Years of Research
1M+ Happy Customers

Extend the benefits of your 5-Day between cycles.
In a single day.

Your 5-Day FMD is the only nutrition program clinically shown to trigger autophagy — renewal at the cellular level — and nothing else delivers it. The 1-Day Reset works in the days between: structured fasting nutrition technology, calibrated for a single day.

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UP TO 25% OFF · HSA/FSA ELIGIBLE
Researched in partnership with 18 world-class universities, including:
WHAT YOU GET

What's in the 1-Day Reset.

Here's what you'll find inside a 1-Day:

Two soups
PLANT-BASED

Two soups

Two plant-based soups (flavor varies by selection). Calibrated to deliver real flavor and nutrient density while keeping you in a fasting state.

A fasting bar and a Choco Crisp
BAR + DESSERT

A fasting bar and a Choco Crisp

One Nuts & Honey fasting bar — patented to have similar effects on blood glucose as drinking a glass of water. Plus one Choco Crisp: a built-in moment of indulgence in the day.

Olives & crackers
REAL FOOD

Olives & crackers

Premium olives and delicious kale crackers. Built into the day at the moment most fasting protocols leave you reaching for something.

Hydration & supplements
SUPPORT

Hydration & supplements

A caffeine-free herbal tea and NR-1 + algal oil supplement packets. The longevity-aligned support that makes the day work.

20,000+ Healthcare professionals
130+ Global patents
41+ Clinical trials
18 University research partners

Your Quarterly Longevity Practice.

The Longevity Lifestyle
Month 1
Month 2
Month 3
5-Day FMD
For Rejuvenation
5 days
1-Day Reset
For Rest
1 day
1 day
Fasting Bars
For Extending Your Fast
L-Protein
For Muscle, Calibrated for Longevity
Quarterly Rejuvenation. Four 5-Day FMD cycles a year is the centerpiece — the only nutrition program clinically shown to trigger autophagy — renewal at the cellular level — and nothing else delivers it.
Monthly Rest. A 1-Day Reset between cycles puts your body into ketosis, supports metabolic markers, and gives your system a true pause.
Daily Support. Fasting Bars to extend your fast or eat while you fast; L-Protein for muscle support, calibrated for longevity. Part of your longevity practice, every day.
WHY ADD A 1-DAY RESET

3 ways the Reset extends the benefits of your 5-Day FMD.

1

A different kind of fasting day. A different kind of work.

Your 5-Day FMD is the only nutrition program clinically shown to trigger autophagy — renewal at the cellular level — and nothing else delivers it. The Reset is a different intervention, doing different work: a single day of structured fasting biology that supports metabolic health and ketosis, in the days between bigger commitments. Same Fasting Mimicking science, calibrated for a single day.

Rest, between rejuvenation
Rest, between rejuvenation
2

A monthly cadence that fits your life.

Some months call for your quarterly FMD. Some months call for something lighter. A 1-Day Reset is a single day of structured fasting biology you can fit into the rhythm of your life — used weekly or monthly to maintain the benefits of your 5-Day between cycles. Supporting ketosis and metabolic markers, in a single day. Part of the longevity practice.

A practice that fits
A practice that fits
3

Real food. Real fasting biology. Real difference.

You know the science — it's why you do the FMD. The 1-Day Reset is built on the same patented Fasting Mimicking Technology® developed by L-Nutra and refined over 25+ years of research. Real, plant-based food, calibrated to stay below your body's nutrient-sensing thresholds. A way to bring that science into the months between cycles — part of the longevity practice, every month.

Patented Fasting Mimicking Technology®
Patented Fasting Mimicking Technology®
UP TO 25% OFF — FOR FMD SUBSCRIBERS

Three ways to extend your practice.

Each bundle ships monthly. Subscribe and save, or one-time. Cancel or pause anytime.

The Monthly Reset
MONTHLY

The Monthly Reset

A reset day, plus daily protein.
1 1-Day Reset
1 L-Protein
$105.99$90.09
15% off
Ships monthly · Subscribe and save
The Monthly Practice
MONTHLY

The Monthly Practice

A reset day, daily protein, and bars to extend your fast.
1 1-Day Reset
1 L-Protein
1 Fasting Bars (12-pack)
$145.98$116.78
20% off
Ships monthly · Subscribe and save
FROM YOUR FELLOW FMD SUBSCRIBERS

The 5-Day's benefits, between cycles.

FMD subscribers who added the Reset, the Bars, or the Protein to make Prolon part of their everyday longevity practice.

★★★★★
Adding the 1-Day Reset between my FMD cycles has kept me feeling the benefits all month long.
Customer Name
FMD subscriber · Verified buyer
★★★★★
I wanted a protein that fit my health goals — L-Protein is now part of my daily longevity routine.
Customer Name
L-Protein subscriber · Verified buyer
★★★★★
I use the Fasting Bars to extend my intermittent fasting window. Easiest part of my practice.
Customer Name
Multi-product customer · Verified buyer

The longevity practice,
year-round.

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Patented Formula Clinically Studied Secure Checkout Free Shipping