Konjac & Glucomannan Research

Konjac flour is a key ingredient used throughout the ZERO range.

Derived from the root of the Konjac plant, Konjac flour is naturally rich in glucomannan, a soluble dietary fibre that has been extensively researched for its potential role in supporting digestive health, healthy cholesterol levels, blood glucose management and feelings of fullness.

Our original Konjac Noodles, Rice, Fettuccine and Lasagna contain the highest proportion of Konjac flour, while our Low Carb Rice, Protein Rice and Protein Noodles also incorporate Konjac flour as part of carefully balanced ingredient blends designed to deliver different nutritional benefits.

The clinical studies below investigate glucomannan itself, often in concentrated forms or controlled research settings. The findings should not be interpreted as applying equally to every ZERO product, as ingredient composition and serving sizes differ across the range.

The information below is provided for educational purposes only. ZERO products are foods and are not intended to diagnose, treat, cure or prevent any disease. If you have a medical condition or specific dietary requirements, please consult your healthcare professional before making significant dietary changes.

Digestive Health

Action of glucomannan on complaints in patients affected with chronic constipation: a multicentric clinical evaluation
https://pubmed.ncbi.nlm.nih.gov/1742540/

Effect of the dietary fibre glucomannan on chronic constipation in neurologically impaired children
https://pubmed.ncbi.nlm.nih.gov/10636972/

A clinical study of the use of a combination of glucomannan with lactulose in the constipation of pregnancy
https://pubmed.ncbi.nlm.nih.gov/9026754/

Blood Glucose & Metabolic Health

Konjac-mannan (glucomannan) improves glycaemia and other associated risk factors for coronary heart disease in type 2 diabetes: A randomised controlled metabolic trial
https://pubmed.ncbi.nlm.nih.gov/10372241/

Beneficial effects of viscous dietary fibre from Konjac-mannan in subjects with insulin resistance syndrome
https://diabetesjournals.org/care/article/23/1/9/22077

Effect of Konjac food on blood glucose level in patients with diabetes
https://pubmed.ncbi.nlm.nih.gov/1966003/

Heart Health & Cholesterol

Effect of short-term ingestion of konjac glucomannan on serum cholesterol in healthy men
https://pubmed.ncbi.nlm.nih.gov/7872224/

A systematic review and meta-analysis of randomised controlled trials examining the effects of Konjac glucomannan on cholesterol
https://pubmed.ncbi.nlm.nih.gov/28356275/

The effect of glucomannan supplementation on blood lipid levels: An updated systematic review and meta-analysis
https://pubmed.ncbi.nlm.nih.gov/39385065/

Weight Management & Satiety

Evaluation of the action of glucomannan on metabolic parameters and the sensation of satiety in overweight and obese patients
https://pubmed.ncbi.nlm.nih.gov/7796558/

Childhood obesity treatment: Double-blind trial of dietary glucomannan versus placebo
https://pubmed.ncbi.nlm.nih.gov/8247594/

Safety and efficacy of glucomannan for weight loss in overweight and moderately obese adults
https://pmc.ncbi.nlm.nih.gov/articles/PMC3892933/

Important Information

The research listed above relates to glucomannan, the naturally occurring soluble fibre found in Konjac flour. Many of these studies used purified or concentrated glucomannan in controlled clinical settings and should not be interpreted as evidence that consuming any individual ZERO product will produce the same outcomes.