Benefits
Bowel regularity and bowel symptom scores
In two placebo-controlled trials in adults with functional constipation (48 adults for 14 days and 135 adults for 60 days), scores fell on 300 mg or 500 mg a day on the PAC-SYM bowel symptom questionnaire, the main outcome of both. The published summaries call the drop significant but do not show whether it was larger than on placebo, and both trials were small and run in India.
Gut transit time and complete bowel movements
In the 60-day trial in 135 adults with functional constipation, gut transit time was reported to shorten and complete spontaneous bowel movements to increase. These were secondary outcomes, the summary gives no figures, and the trial was funded by the company that sells the blend.
Digestive comfort and bowel-related quality of life
In both trials, scores on a digestive symptom rating scale (GSRS) and a bowel-related quality of life questionnaire (PAC-QOL) fell during treatment, reported as significant. These were secondary questionnaire outcomes in small trials, and the summaries do not show whether the scores fell more than on placebo.
Self-rated sleep quality, stress and mood
Both trials reported better self-rated sleep quality, and the trial summaries report lower stress ratings in the 14-day trial and lower anxiety and low-mood symptom scores in the 60-day trial. These were secondary outcomes in people recruited for bowel symptoms, the scales were not named in the summaries, and the effects have not been tested in stressed adults.
Blood markers linked to gut and stress signaling
In both trials, blood cortisol and IL-6 fell and serotonin, gastrin and IL-10 rose, and the 60-day trial also reported lower zonulin and higher diamine oxidase. These are laboratory markers, not health outcomes, and serotonin in blood does not show what happens in the brain.
Mechanism of action
Gut muscle contraction (lab and animal work)
In strips of rat small intestine, the blend increased muscle contractions in a dose-dependent way, and the effect was blocked by atropine, which points to muscarinic (acetylcholine) receptors. Rats given 200 or 300 mg/kg for 8 days had faster stomach emptying and gut transit and wetter stools, with no change in pellet count. Not yet measured in people.
Stress hormone and serotonin signals (animal and marker data)
In the same rat study, serum corticosterone (the rat stress hormone) fell and serotonin rose, and the human trials reported lower cortisol and higher serotonin in blood. The makers describe this as gut-brain axis activity, but no study has shown that these marker changes cause the bowel effects.
Two plant extracts in one blend
The blend pairs okra fruit extract, standardized to polysaccharides (the mucilage fiber), with ashwagandha root extract, standardized to withanolides. A review co-written by one trial author cites unpublished lab work for a stronger effect than either extract alone; no published study has compared them, so the role of each part is unknown.
Clinical trials
Randomized double-blind placebo-controlled single-site trial of CL18100F4 300 mg or 500 mg a day (one capsule after dinner, per the registry) for 14 days at a hospital in Guntur, India; the registered primary outcome was change in PAC-SYM score. Registered as CTRI/2020/11/029320, which names CLS Pvt Ltd (Telangana, India) as sponsor and funder. All four authors were hospital staff, none was listed at Laila Nutraceuticals, and they declared no competing interests. (Punukollu et al. 2024, J Ethnopharmacol)
48 men and women aged 25 to 60 with functional constipation by Rome III criteria.
The authors report that both doses significantly reduced PAC-SYM, PAC-QOL and GSRS scores (p < 0.0001) and improved sleep quality and stress ratings; the summary does not say whether these p values compare the blend with placebo or with baseline, and gives no placebo-group figures. On 500 mg, serum serotonin, gastrin and IL-10 rose and IL-6 and cortisol fell by the end of the study. No adverse events were reported, and blood counts, blood chemistry, vital signs and urine tests stayed in the normal range.
Randomized double-blind placebo-controlled trial of CL18100F4 300 mg or 500 mg a day for 60 days in India (authors at hospitals in Varanasi and Guntur); primary outcome was the PAC-SYM score at days 7, 30 and 60. Funded by NXT USA, Inc. (grant 23/NXTUS/GH20, per the publisher's funding record); no registry number was found. No author was listed at Laila Nutraceuticals; one author also co-wrote a review promoting the blend. (Singh et al. 2024, J Am Nutr Assoc)
135 men and women aged 25 to 60 with functional constipation by Rome IV criteria.
The authors report that the blend significantly (p < 0.001) reduced PAC-SYM, PAC-QOL and GSRS scores and gut transit time and improved complete spontaneous bowel movements, starting from day 7, and improved sleep quality and depression and anxiety symptoms; the summary does not say whether these p values compare the blend with placebo or with baseline, and gives no placebo-group figures. Serum IL-10, diamine oxidase, serotonin and gastrin rose and IL-6, cortisol and zonulin fell. No major adverse events were seen, and laboratory tests stayed in the normal range.
Laboratory study on isolated rat intestine plus an 8-day feeding study in Wistar rats at 200 and 300 mg/kg body weight. Six of the seven authors were employees of the Laila Nutra R&D department. (Annavarapu et al. 2026, Toxicol Mech Methods)
Isolated rat ileum and Wistar rats.
The blend increased intestinal contractions in a dose-dependent way, an effect blocked by atropine. In rats it improved gastric emptying, intestinal transit and stool moisture without changing pellet count, lowered serum corticosterone and raised serotonin, with no adverse changes in liver, kidney or metabolic tests. This is an animal study and does not show an effect in people.
Guideline toxicology program of LN20188 (the same blend): acute oral toxicity, a 90-day repeated-dose study in rats at 500, 1,000 and 1,500 mg/kg a day, and three genetic toxicity tests. Funded by Laila Nutra Private Limited, and all four authors were Laila employees. (Madireddy et al. 2026, Biomed Res Int)
Rats, mice, bacterial strains and human blood cells in culture.
The median lethal dose was above 2,000 mg/kg, and in the 90-day study body weight, organ weights, blood counts, blood chemistry and thyroid hormones (T3, T4 and TSH) were comparable with controls, giving a no-observed-adverse-effect level of 1,500 mg/kg, the highest dose tested. The blend did not damage genes in the three tests. Animal safety data do not establish safety in people.