Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Copper (as Copper Bisglycinate) | Magnesium L-Threonate | |
|---|---|---|
| Category | Minerals | Minerals |
| Standard Dose | 1-2mg elemental copper daily (when supplementing zinc >25mg) | 1000-2000mg magnesium L-threonate daily (providing ~144mg elemental Mg per 2000mg) |
| Timing | With food. Separate from zinc by 2+ hours for optimal absorption of both. | Split dose: 1 capsule morning, 2 capsules before bed (or per product label). Evening dose supports sleep and overnight memory consolidation. |
| Cycle Duration | ongoing when zinc supplementation is ongoing | ongoing |
| Evidence Level | strong_human | moderate_human |
Copper is a cofactor for critical cuproenzymes: cytochrome c oxidase (Complex IV, mitochondrial respiration), Cu/Zn-SOD (superoxide dismutation), ceruloplasmin (ferroxidase — converts Fe2+ to Fe3+ for transferrin loading; essential for iron metabolism), lysyl oxidase (collagen and elastin cross-linking), dopamine beta-hydroxylase (dopamine to norepinephrine conversion), tyrosinase (melanin synthesis), and peptidyl-glycine alpha-amidating monooxygenase (neuropeptide processing). Copper is transported by ATP7A/B (Menkes/Wilson proteins) and regulated by metallothionein and glutathione.
1-2mg elemental copper daily (when supplementing zinc >25mg)
With food. Separate from zinc by 2+ hours for optimal absorption of both.
ongoing when zinc supplementation is ongoing
Magnesium L-threonate (Magtein) was specifically developed by MIT researchers to cross the blood-brain barrier efficiently. L-threonate, a metabolite of vitamin C, acts as a carrier to increase brain magnesium concentration by ~15% (compared to negligible CNS penetration from other Mg forms). Elevated brain Mg2+ enhances NMDA receptor signaling fidelity, increases synaptic density in the hippocampus and prefrontal cortex, promotes BDNF expression, and enhances both short-term and long-term memory via potentiation of pre-synaptic release probability at hippocampal CA3-CA1 synapses.
1000-2000mg magnesium L-threonate daily (providing ~144mg elemental Mg per 2000mg)
Split dose: 1 capsule morning, 2 capsules before bed (or per product label). Evening dose supports sleep and overnight memory consolidation.
ongoing
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