Research review: prebiotic fibers like inulin selectively feed beneficial Bifidobacteria, and higher fiber intake is linked to lower body weight and heart disease.
Read the 2013 study in Nutrients
The Cleanse
The Cleanse is a full-body reset for your gut. Cleansing herbs, prebiotic fiber, and antioxidants like psyllium husk, acai berry, chlorella, and slippery elm work together to support your body's natural detox and soothe the gut lining.
30-day supply. Subscribe & save 15%, delivered monthly. Pause or cancel anytime.
Just $0.85/day $1.00/day
Your first order includes
- ✓Free Gut Reset Guide (digital)
- ✓Free shipping, always
- ✓Cancel or skip anytime
One-time $29.99 ($1.00/day) — subscribe to save 15% + free Gut Reset Guide
Try it risk-free for 60 days
Give it an honest run. If you don't feel better about your gut, we'll refund you, even if the bottle is empty. No forms, no runaround.
- Clinically Studied Ingredients
- Built to Survive Digestion
- No Fillers, No BS
- GMP-Certified Manufacturing
Backed by published research
The ingredients in this formula are studied in 2 peer-reviewed publications. See the research
A gentle reset, from the inside out.
Eleven botanicals that sweep, soothe, and restart a sluggish gut.
Psyllium husk and prebiotic inulin move things along and feed good bacteria on the way through.
Acai berry, chlorella, and lycopene from tomatoes bring the cleanup crew while the fiber does the heavy lifting.
Slippery elm bark and aloe ferox have been used for generations to calm and coat an irritated gut lining.
Ginger root and gentle herbs get a sluggish system moving without the harshness of a stimulant cleanse.

60-Day Money-Back Guarantee
Our standards
Every bottle is produced in a GMP-certified, FDA-registered facility and tested before it ships. What the label says is what the capsule holds.
Ingredients come first.
The working ingredients, with exact doses on the label. Nothing else.

Psyllium husk
The sweep
Plant fiber that absorbs water and carries waste out, the backbone of any honest cleanse.

Acai berry
The restore
The Amazonian berry dense with anthocyanin antioxidants that give this formula its name.

Slippery elm
The soothe
Bark that forms a soothing coat along the gut lining while everything else works.

Ginger root
The mover
The classic digestive kick that keeps a reset comfortable instead of stagnant.
60-Day Money-Back Guarantee
Backed by published research.
The strongest findings from the human studies behind these ingredients, straight from the journals that ran them.
Peer-reviewed & published in
PubMed
NutrientsEvidence review: gel-forming fibers like psyllium lower cholesterol, improve blood sugar control, and produce softer, easier-to-pass stools.
Read the 2017 study in Academy of Nutrition and DieteticsResearch cited is on individual ingredients, not on finished Stillbelly products. These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease. Full research library.

Daily routine, made easy.
- 1
Take 1 capsule in the morning and 1 in the evening.
- 2
Drink plenty of water through the day. Fiber works best hydrated.
- 3
Run it daily. One bottle is a complete 30-day reset.
60-Day Money-Back Guarantee
Common questions
The Cleanse, answered.
How long is one cleanse cycle?
Take one capsule in the morning and one in the evening for 30 days. One bottle of 60 capsules is a complete cycle.
Will it send me running to the bathroom?
It is built around gentle fiber (psyllium and inulin) and soothing botanicals like slippery elm and aloe ferox, not harsh stimulant laxatives, so it supports regularity without the urgency of a stimulant cleanse. Drink plenty of water while taking it.
Does it contain allergens?
Yes, it contains tree nuts (black walnut hull). The other ingredients are hypromellose (vegetable capsule) and magnesium stearate.
Can I take it with other supplements or medication?
It is a botanical fiber blend. If you take medication or have a health condition, check with your healthcare provider before starting, since fiber can affect how some medications are absorbed.
From the Journal
The science behind it, in plain English
Make it the whole system.
The Spark, The Shield, The Quick Fix, and The Cleanse cover digestion from every angle. Bundle all four and save about $20, or subscribe for 15% off with free shipping on every order.
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The Cleanse
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