Human Milk Oligosaccharides

6'-Sialyllactose (6'-SL)

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Human Milk Oligosaccharide 6′-SL (6′-Sialyllactose) is the most abundant sialylated HMO in human milk. 6′-SL occurs in human milk in a concentration of 0.89 (± 0.33) g/L1,2. The specific functional benefits of 6′-SL include reducing the risk of infection by inhibiting the adhesion of pathogenic bacteria and their toxins, or potential viruses3,4,5. 3′-SL and 6′-SL in particular promote brain development in infants by supplying sialic acid, an essential building block for neurons. In animal models, supplementation with sialic acid and sialyllactose is associated with improved memory and learning skills.6,7.

Jennewein Biotechnologie produces 6′-Sialyllactose on a commercial scale under FSSC 22000 and ISO 9001. The product is available as a spray-dried powder. Jennewein 6′-Sialyllactose is Orthodox Union Kosher, as well as Halal (Halal Food Council of Europe) certified.

We offer 6′-Sialyllactose (CAS 74609-39-5) with the following specification:

Product code:
1031 6′-Sialyllactose Infant formula grade ≥ 90 % (spray-dried)


Regulatory Applications for 6′-SL have already been submitted in EU (EFSA), US (FDA GRAS) and further markets.

Please contact us for further details including product samples:


  1. Thurl, Stephan, et al. “Systematic review of the concentrations of oligosaccharides in human milk.” Nutrition reviews11 (2017): 920-933.
  2. McGuire, Michelle K., et al. “What’s normal? Oligosaccharide concentrations and profiles in milk produced by healthy women vary geographically.” The American journal of clinical nutrition5 (2017): 1086-1100.
  3. Simon et al. “Inhibition of Helicobacter pylori binding to gastrointestinal epithelial cells by sialic acid-containing oligosaccharides. ” Infect Immun.2(1997): 750–757.
  4. Amr El-Hawiet, Elena N Kitova, John S Klassen, “Recognition of human milk oligosaccharides by bacterial exotoxins”. Glycobiology, Volume 25, Issue 8, (2015): 845–854.
  5. Hester et al. “Human milk oligosaccharides inhibit rotavirus infectivity invitro and in acutely infected piglets.” J. Nutr. 110.7 (2013): 1233−42.
  6. Wang B. “Molecular Mechanism Underlying Sialic Acid as an Essential Nutrient for Brain Development and Cognition. ” Nutrition, 1.3 (2012): 465S-472S.
  7. Jacobi et al. “Dietary isomers of sialyllactose increase ganglioside sialic acid concentrations in the corpus callosum and cerebellum and modulate the colonic microbiota of formula-fed piglets. ” Nutr. 146 (2016): 200–208.