Does L-threonate directly elevate intraneuronal magnesium and regulate synapse density, and why is magnesium alone ineffective for enhancing learning and memory?
Magnesium L-Threonate (Neuropharmacology 2016, PMID 27178134) — l-threonate directly increases magnesium inside neurons, leading to more synapses and improved cognitive function, which explains why it's a key component of L-TAMS. No numeric effect size is reported for Magnesium L-Threonate in the source abstract.
Source: Neuropharmacology 2016, PMID 27178134 ↗ · Research map · How Magellan grades evidence · evidence confidence: low
Neuropharmacology · 2016 · PMID 27178134 · DOI 10.1016/j.neuropharm.2016.05.006
L-threonate directly increases magnesium inside neurons, leading to more synapses and improved cognitive function, which explains why it's a key component of L-TAMS.
The question
Does L-threonate directly elevate intraneuronal magnesium and regulate synapse density, and why is magnesium alone ineffective for enhancing learning and memory?
What they tested
The study aims to understand the unique role of threonate, specifically if it acts directly to elevate intraneuronal Mg2+ and mediates the therapeutic effects of L-TAMS.
How they did it
The researchers investigated the effects of threonate in cultured hippocampal neurons and human neural stem cell-derived neurons. They measured intracellular Mg2+ concentration, NR2B-containing NMDAR expression, mitochondrial membrane potential (ΔΨm), and functional synapse density. They also examined the role of glucose transporters (GLUTs) in mediating threonate's effects and measured CSF threonate levels after oral L-TAMS treatment.
What they found
Threonate is naturally present in CSF, and oral L-TAMS elevated CSF threonate. In cultured hippocampal neurons, threonate treatment directly increased intracellular Mg2+ concentration. Threonate also upregulated NR2B-containing NMDAR expression, boosted mitochondrial membrane potential (ΔΨm), and increased functional synapse density. These effects were unique to threonate and mediated through glucose transporters (GLUTs). Threonate was equally effective at upregulating synapse density in human neural stem cell-derived neurons.
What it means
Threonate directly elevates intraneuronal magnesium and regulates structural and functional synapse density through glucose transporters, explaining its essential role in L-TAMS for promoting cognitive abilities.
Limitations
The abstract does not explicitly state any limitations of the study.
Where the published abstract does not list limitations, we say so rather than inventing them. Read the full paper on PubMed before drawing conclusions.
The paper at a glance
| Title | Regulation of structural and functional synapse density by L-threonate through intraneuronal magnesium |
|---|---|
| Journal | Neuropharmacology |
| Year | 2016 |
| PMID | 27178134 ↗ |
| DOI | 10.1016/j.neuropharm.2016.05.006 ↗ |
| Topic | Brain, cognition & mood |
Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗
Where Magellan uses this paper
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Magnesium L-Threonate
In small randomized trials, magnesium-L-threonate improved composite cognition versus placebo in older adults with cognitive impairment and improved cognitive performance, sleep-quality scores and daytime functioning in healthy adults.
Magnesium L-threonate (also called L-threonic acid magnesium salt, L-TAMS, or the branded ingredient…
Research describes the compound or intervention studied. It is not a claim about any specific product.
Molecules & mechanisms in this paper
Each of these is named in the paper’s own words above. Open the monograph for the full mechanism and its other citations.
Cite this page
These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.
Magellan Longevity. (2026). Does L-threonate directly elevate intraneuronal magnesium and regulate synapse density, and why is magnesium alone ineffective for enhancing learning and memory? [Plain-English summary of Neuropharmacology 2016, PMID 27178134, DOI 10.1016/j.neuropharm.2016.05.006]. Magellan Longevity. https://magellanlongevity.com/study/d27178134.html@misc{magellan_d27178134,
title = {Does L-threonate directly elevate intraneuronal magnesium and regulate synapse density, and why is magnesium alone ineffective for enhancing learning and memory?},
author = {{Magellan Longevity}},
year = {2026},
howpublished = {\url{https://magellanlongevity.com/study/d27178134.html}},
note = {Plain-English summary of PubMed PMID 27178134; DOI 10.1016/j.neuropharm.2016.05.006; Neuropharmacology 2016. Reviewed by Gabriel Radu, DO},
urldate = {2026-08-11}
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