Sialic Acid
Milk-rich sugar acid, a building block of brain gangliosides and synaptic plasticity.
Pharmacology
Contents
WHAT IS SIALIC ACID?
Detailed overview
Sialic acid (N-acetylneuraminic acid, Neu5Ac) is a nine-carbon amino sugar acid that occupies the terminal positions of the oligosaccharide chains on glycoproteins and glycolipids, where its strong negative charge acts as a cell-surface recognition marker. In the nervous system it is a constituent of gangliosides and of the polysialic acid (PSA) attached to NCAM, supporting synaptogenesis, neuronal outgrowth and memory formation. It is especially abundant in breast milk, particularly colostrum, which is why it is linked to infant brain development and learning. The cognitive benefits come mainly from piglet, rat and mouse models; there is as yet no human cognition trial, so it is best treated as a dietary nutrient rather than a drug.
Mechanism
Ganglioside and PSA-NCAM building block
Evidence
Preclinical (animal studies)
Found in
Breast milk, colostrum, whey
Receptor profile
- Brain gangliosidesStrong
- Polysialic acid on NCAMModerate
- Neuronal differentiation and regenerationModerate
Safety
Side effects, stop signs, contraindications
Side effects · 4
- Naturally occurring nutrient with few reported adverse effects at dietary levels
- Limited safety data for isolated, concentrated supplement forms
- Possible mild digestive upset with concentrated products
- Cognitive benefits shown only in animals so far; human effect unproven
Contraindications · 3
- Pregnancy and breastfeeding: although naturally present in milk, isolated high-dose supplementation is not established, consult a clinician
- Safety of isolated, long-term, high-dose supplementation is not established
- Not a substitute for medical treatment of any condition
Related Nootropics
Same therapeutic category
Studies
Related research and clinical findings
Dietary sialic acid supplementation improves learning and memory in piglets
Wang B, Yu B, Karim M, Hu H, Sun Y, McGreevy P, Petocz P, Held S, Brand-Miller J
Sialic Acid and Sialylated Oligosaccharide Supplementation during Lactation Improves Learning and Memory in Rats
Oliveros E, Vazquez E, Barranco A, Ramirez M, Gruart A, Delgado-Garcia JM, Buck R, Rueda R, Martin MJ
Maternal Neu5Ac Supplementation During Pregnancy Improves Offspring Learning and Memory Ability in Rats
Bian D, Wang X, Huang J, Chen X, Li H
Supplementation of 3'-Sialyllactose During the Growth Period Improves Learning and Memory Development in Mice
Zhu J, Zhang G, Song Z, Xiang X, Shu S, Liu Z
Efficacy of sialic acid supplementation in early life in autism model rats
Yang J, Liu Y, Wang H, Zhang L
FAQ
FAQ
Milk-rich sugar acid, a building block of brain gangliosides and synaptic plasticity.
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Structure & chemistry
The information here is strictly for educational and scientific purposes. It does not replace medical advice or clinical consultation, and it does not encourage illegal substance or pharmaceutical use. Data is sourced. When in doubt, consult your doctor.