Last update: March 21, 2020

E1105 (muramidase)

Very Low Risk for breastfeeding

Safe. Compatible.
Minimal risk for breastfeeding and infant.

Mucopolysaccharidase, enzyme which is present in many body fluids (saliva, milk, tears) witn antibacterial, antiviral and anti fungal activity (Giuffrida 2018, Lönnerdal 2003, Mata 1971).
It is a protein composed of about 130 amino acids.

On latest update no relevant published data on breastfeeding were found.

Because its protein composition it would be barely absorbed by the gut, and, a high molecular weight would render excretion into breast milk unlikely.


We do not have alternatives for E1105 (muramidase) since it is relatively safe.

Suggestions made at e-lactancia are done by APILAM´s pediatricians and pharmacists, and are based on updated scientific publications.
It is not intended to replace the relationship you have with your doctor but to compound it.

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

E1105 (muramidase) is also known as Lysozyme Hydrochloride. Here it is a list of alternative known names::

E1105 (muramidase) in other languages or writings:


Main tradenames from several countries containing E1105 (muramidase) in its composition:


Variable Value Unit
Oral Bioavail. 0,1 %
Molecular weight 14.000 - 20.000 daltons


  1. Giuffrida MC, Cigliana G, Spoto G. Ultrasensitive detection of lysozyme in droplet-based microfluidic devices. Biosens Bioelectron. 2018 May 1;104:8-14. Abstract
  2. Lönnerdal B. Nutritional and physiologic significance of human milk proteins. Am J Clin Nutr. 2003 Jun;77(6):1537S-1543S. Review. Abstract
  3. Mata LJ, Wyatt RG. The uniqueness of human milk. Host resistance to infection. Am J Clin Nutr. 1971 Aug;24(8):976-86. Review. Abstract

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e-lactancia is a resource recommended by La Liga de la Leche de México from Mexico

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