You've built your fasting practice.
We've built your upgrade.
The Prolon 1-Day Reset is a calibrated fasting-mimicking protocol for your 24-hour fasting practice. Not 500 calories of broth and willpower or water and white-knuckling. Real fasting biology — with food through our nutrition technology — all day.
Start Your First ResetCalibrated to do what broth can't.
A true fast isn't about eating less — it's about staying below your body's nutrient-sensing thresholds, so it doesn't think it's eating.
Here's why fasting practitioners switch to the Reset.
If you've been hitting your fasting days with broth, salads, low-cal smoothies, or sheer water and willpower — here's what changes when you switch to a science-backed, fasting-mimicking protocol.
| Low-cal fasting day (broth, salad) | Water-only fast | Low-cal meal replacements | 1-Day Reset | |
|---|---|---|---|---|
| True fasting biology | — | ✓ | — | ✓ |
| Stays below nutrient-sensing pathways | — | N/A | — | ✓ |
| You eat real food | Varies | — | Liquid | ✓ |
| Pre-portioned, no planning | — | N/A | Partial | ✓ |
| Designed for sustained fasting practice | — | — | — | ✓ |
| Backed by clinical research | — | Limited | — | ✓ |
| HSA/FSA eligible | — | N/A | Varies | ✓ |
Breakfast. Lunch. Snack. Dinner.
Here's what your fasting day actually looks like on the Reset:
Breakfast
A plant-based bar and herbal tea. Light, nutrient-dense, calibrated to begin the fasting state without the rough start of skipping a meal.
The upgrade: You've been starting fasting days hungry. Now you start them with breakfast.
Lunch
A nourishing plant-based soup with almond and kale crackers. Real food, real flavor, calibrated through a precise macro to micronutrient ratio with carefully selected longevity ingredients rather than calorie count alone.
The upgrade: Not a dry salad or watery smoothie. A real lunch that keeps you in fasting.
Snack
Premium olives. Genuinely good — the kind you'd eat off a board at a wine bar. Built into the day at the moment most fasting protocols leave you white-knuckling.
The upgrade: The 3pm window where most fasting days fall apart. Now it's a snack.
Dinner
A second plant-based soup and a fasting bar. A clear, defined close to your fasting day.
The upgrade: No more ending fasting days starving. Dinner closes the day, you sleep, you wake up done.
Six reasons the Reset is the upgrade to your fasting practice.
It's precisely calibrated to the biology of fasting — ingredient by ingredient, ratio by ratio.
Most fasting days are calorie restriction. Eat a few hundred calories of whatever you can fit, hope your body responds. Real fasting biology is different. Your body has nutrient-sensing pathways that detect when you're "eating" versus "fasting" — and those pathways respond to the kind of nutrients, not just the amount. The 1-Day Reset is calibrated, ingredient by ingredient, to stay below those thresholds. That's why it activates a true fasting state where broth often doesn't.
Built on the most-studied fasting science available.
The 1-Day Reset uses patented Fasting Mimicking Technology® developed by L-Nutra — the same science backed by 41+ clinical trials, 130+ global patents, developed in partnership with 18 world-class research universities, and recommended by over 20,000 healthcare professionals.
The fasts you finish are the ones that work.
The biggest predictor of whether a fasting practice produces results isn't intensity — it's finishability. Three meals plus a snack means you can reach the end of the day. No 3pm collapses, no "I'll start over Monday" loops, no compromised compliance that quietly undermines the protocol. The fasts you can sustain are the ones that produce results.
Real food. Real fasting biology. Real difference.
The 1-Day Reset is calibrated, ingredient by ratio, to stay below your body's nutrient-sensing thresholds. You eat — real plant-based food — and your body experiences a fasting state. That's the patented Fasting Mimicking Technology® developed by L-Nutra, refined over 25+ years of research. The science of a fasting day, in a format you can actually do.
No fasting-day grocery lists. No 4pm what-am-I-eating debates.
If you've been doing 24-hour fasts for a while, you've spent more time than you'd like figuring out what the right meal-skipping or low-cal day looks like. The Reset is the day, solved. Pre-portioned, pre-sequenced, plant-based, gluten-free, dairy-free. Open the box, eat the meals, done. The mental tax of fasting days disappears.
Roughly what you'd spend on fasting-day food anyway. With science.
If you're fasting regularly, you're already buying special food for those days — soups, broths, salads, low-cal meal replacements, supplement-based shakes. The Reset replaces that spend from $40 per day on subscription — and it's HSA/FSA eligible, so pre-tax health dollars cover it. You're not adding a cost, you're upgrading the biological value.
24 hours. Four phases. Real fasting biology.
If you've been calorie-restricting on your fasting days hoping for these effects — here's what your body actually does on a calibrated fasting protocol.
Long-time fasters who switched.
They tried it once and never looked back.
Match your subscription to your fasting practice.
Three cadence options, designed around how often you fast. Cancel or pause anytime. HSA/FSA eligible.
- Plant-based soups, fasting bars, premium olives, almond and kale crackers, herbal tea
- Free shipping on every order
- HSA/FSA eligible — use pre-tax health dollars
- Cancel or pause anytime