BellyFlush Reviews: What Is in It, and Is the “Marshmallow Trick” Just a Laxative?

What BellyFlush is

BellyFlush is a capsule from Simple Promise, the brand behind VenoPlus 8, which gives a US address in Camas, Washington. Its ClickBank version is sold at cb.getbellyflush.com, and the brand’s own online shop sells it at the same prices. The affiliate program is run by Truegenics, which also runs the one for Arctic Blast. The bottle holds 60 capsules and says “Detox and Cleanse”, “Gut and Colon Support” and “Reduces Occasional Bloating”. The directions are two capsules 20 to 30 minutes before bed with a glass of water.

What the label shows

Per two-capsule serving, the Supplement Facts label lists three blends:

• Body Cleanse Blend, 590 mg: cascara sagrada bark, cape aloe leaf (Aloe ferox), senna leaf extract standardised to 20% sennosides, and triphala fruit (Terminalia bellirica)
• Digestion Support Blend, 230 mg: fennel seed and bentonite clay
• Detox & Gut Health Blend, 300 mg: marshmallow root, licorice root extract (6% glycyrrhizic acid), slippery elm bark, cayenne pepper and milk thistle seed

Because the amounts sit inside blends, you cannot tell how much senna you take each night, or how many milligrams of sennosides, the active compounds. A senna laxative sold as a drug states its dose; a regular-strength tablet has 8.6 mg of sennosides. The warnings on BellyFlush’s product page say only not to exceed the serving size and to check with a doctor first if you are pregnant, nursing, ill or taking medicines.

Three laxatives in a “no laxatives” pitch

The sales letter, told by a grandmother called “Jennifer Turner”, says its “marshmallow trick” does not involve “taking dangerous laxatives”, that it is “totally different” from a laxative, and that laxatives are “the WORST”. Yet the first blend on the label is built on three stimulant laxatives:

• Senna: an approved over-the-counter laxative ingredient, and it works. In a 2021 trial in 90 people with chronic constipation, 69% of those given senna improved over four weeks, against 12% of those given a placebo, and the 2023 US gastroenterology guideline gives senna a conditional recommendation.
• Cascara sagrada and aloe: in 2002 the FDA ruled that they are not generally recognised as safe and effective in over-the-counter laxatives, after manufacturers sent none of the safety data, including cancer studies, the agency had asked for. They can still be sold in supplements.
• The warnings: over-the-counter senna laxatives say not to use them for more than one week unless a doctor says so, to ask a doctor first if you have stomach pain, nausea or vomiting, and to stop if you have rectal bleeding.

The warnings on BellyFlush’s product page include none of these, and the letter tells you to take it every night: it says the product “takes at least 180 days” to work and recommends the six-month pack.

The weight-loss and “stuck poop” claims

• “Flush out 5–10 lbs of rotten, festering poop”: the idea that pounds of old stool sit stuck in the gut is not supported. A 2009 systematic review of colon cleansing found no rigorous trials showing it helps general health, and many reports of harm.
• Weight loss: the page shows testimonials of 25, 38, 43, 64 and 77 pounds lost, one saying it was “like a vacuum cleaner was sucking 1 or 2 lbs of fat” out every day. Laxatives work in the large bowel, after calories have been absorbed: in a 1983 study, even extreme purging that produced 4 to 6 litres of diarrhoea cut calorie absorption by only about 12%. Weight lost by emptying the bowel is stool and water, and it comes back.
• Fibre and water: the letter says fibre can make constipation worse, citing a 2012 study in which 63 people improved after cutting fibre. That study had no control group. A 2016 meta-analysis of seven placebo-controlled trials found 77% of people responded to fibre supplements against 44% on placebo, although the evidence was of low quality, and the 2023 guideline recommends fibre.

Who is telling the story

The footnotes say “Jennifer Turner” and her friend “Sarah” are real customers whose names have been changed, and that “Alex Del Pizzo”, the researcher said to have spent years perfecting the formula, “is a real researcher at BellyFlush” whose name has also been changed, so his work cannot be checked. Testimonial names are changed too, and the letter shows “before” and “now” photos of its narrator. It warns that prices will rise next month and that supplies are limited, “not a marketing gimmick”, and says Simple Promise charges $99 a bottle on its main site, where the actual price is the same $59. Its reference list of about 60 links includes a candy-industry page about marshmallows, a report on trees after the Chernobyl accident and an encyclopaedia biography; none tests BellyFlush. Two of the testimonials on its affiliate page are about blood pressure and a beet drink.

Side effects and who should avoid it

• Stimulant laxatives: cramps and diarrhoea; with heavy or long use, dehydration and low potassium.
• Licorice: its glycyrrhizic acid can raise blood pressure and lower potassium. The amount here is small, at most 18 mg a day, but it adds to the laxatives’ effect on potassium. Ask a doctor first if you have high blood pressure, heart or kidney disease, or take diuretics or digoxin.
• Bentonite clay: it can bind medicines in the gut, so take other medicines at a different time.
• Do not use it if you are pregnant or breastfeeding, for children, or if you have stomach pain you cannot explain, inflammatory bowel disease or a possible bowel blockage.
• See a doctor for constipation that is new or getting worse, especially after 50, or that comes with blood in the stool, weight loss you cannot explain, or severe pain.

What helps constipation instead

Psyllium fibre has the best evidence among supplements, and prunes and kiwifruit work well as foods. When a laxative is needed, the 2023 guideline strongly recommends polyethylene glycol, and senna or magnesium oxide are reasonable options, taken as labelled drugs with a known dose. Our constipation guide compares them, with doses.

Price and packages

One bottle costs $59, three cost $147 ($49 each) and six cost $198 ($33 each), all with free shipping. The three- and six-bottle packs add three e-books. It is a one-time payment, and the affiliate page shows there are extra offers after checkout. Simple Promise’s own shop charges the same prices. Our BellyFlush buying guide covers shipping outside the US.

How the 365-day refund works

The page promises a refund of “every single penny you paid (including shipping)”, even if you have used every bottle. The return policy sets out the steps: send the bottles back, used, unused or empty, within a year of purchase to the returns centre in Federalsburg, Maryland, with your name and order number, then tell support and send a photo of the postage receipt. It is the same returns centre and policy as Arctic Blast.

Realistic expectations

BellyFlush will probably give you bowel movements, because it contains senna, cascara and aloe. It will not remove fat, rebuild a “slippery gut gel” or need six months to work, and taking stimulant laxatives every night for months is not something to do without a doctor. If you are constipated, start with fibre, fluids and movement, and use a labelled laxative for short spells if needed.