Last update Oct. 9, 2016

Konjac Mannan


Safe substance and/or breastfeeding is the best option.

Polysaccharide (mannose and glucose) obtained from Amorphophallus konjac a tuberous plant which is native from Southeast Asia and used in the traditional cuisine of the countries of that region.

Used as dietary fiber with satiating and laxative purposes. There is no a consistent scientific evidence on their effectiveness as a treatment for obesity.
The Commission E of German Ministry of Health has not approved any use.

At latest update no published data on excretion into breast milk were found.
Pharmacokinetic data (high molecular weight and no intestinal absorption) make it extremely unlikely any excretion into breastmilk in significant amounts.

A low-calorie diet and moderate exercise are preferable measures to lose weight.
Many women who breastfeed their infants recover their pre-pregnancy weight sooner than those who do not.


Suggestions made at e-lactancia are done by APILAM team of health professionals, and are based on updated scientific publications. It is not intended to replace the relationship you have with your doctor but to compound it. The pharmaceutical industry contraindicates breastfeeding, mistakenly and without scientific reasons, in most of the drug data sheets.

Jose Maria Paricio, Founder & President of APILAM/e-Lactancia

Your contribution is essential for this service to continue to exist. We need the generosity of people like you who believe in the benefits of breastfeeding.

Thank you for helping to protect and promote breastfeeding.

José María Paricio, founder of e-lactancia.

Other names

Konjac Mannan is also known as Glucomannan. Here it is a list of alternative known names::

Konjac Mannan in other languages or writings:


Main tradenames from several countries containing Konjac Mannan in its composition:


Variable Value Unit
Oral Bioavail. 0 %
Molecular weight 200.000 - 2.000.000 daltons


  1. Zalewski BM, Chmielewska A, Szajewska H. The effect of glucomannan on body weight in overweight or obese children and adults: a systematic review of randomized controlled trials. Nutrition. 2015 Abstract
  2. Onakpoya I, Posadzki P, Ernst E. The efficacy of glucomannan supplementation in overweight and obesity: a systematic review and meta-analysis of randomized clinical trials. J Am Coll Nutr. 2014 Abstract
  3. López-Regueiro S, Ramos Sáiz EM, López-Picado A, Burgos-Alonso N, Arana-Salaberría, A. Fitoterapia como coadyuvante en el tratamiento de la obesidad. Farmacéuticos Comunitarios 2012; 4(4): 166-174 2012 Full text (link to original source) Full text (in our servers)
  4. AESAN. Informe del Comité Científico de la Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) sobre condiciones de uso de determinadas sustancias distintas de vitaminas, minerales y plantas para ser empleadas en complementos alimenticios - 1. Revista del comité científico nº 17. 2012 Full text (in our servers)
  5. Chmielewska A, Horvath A, Dziechciarz P, Szajewska H. Glucomannan is not effective for the treatment of functional constipation in children: a double-blind, placebo-controlled, randomized trial. Clin Nutr. 2011 Abstract
  6. Keithley J, Swanson B. Glucomannan and obesity: a critical review. Altern Ther Health Med. 2005 Abstract
  7. Signorelli P, Croce P, Dedè A. [A clinical study of the use of a combination of glucomannan with lactulose in the constipation of pregnancy]. Minerva Ginecol. 1996 Abstract

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