Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Copper (as Copper Bisglycinate) | Zinc Picolinate | |
|---|---|---|
| Category | Minerals | Minerals |
| Standard Dose | 1-2mg elemental copper daily (when supplementing zinc >25mg) | 15-30mg elemental zinc (as zinc picolinate) daily |
| Timing | With food. Separate from zinc by 2+ hours for optimal absorption of both. | With food to minimize nausea. Separate from iron, calcium, and copper supplements by 2 hours. NOT with high-phytate meals. |
| Cycle Duration | ongoing when zinc supplementation is ongoing | ongoing (with copper balance — see notes) |
| Evidence Level | strong_human | strong_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
Zinc is a cofactor for >300 enzymes and is a structural component of >2000 transcription factors (zinc finger proteins). It is essential for: immune function (T-cell maturation, NK cell activity, neutrophil function), DNA synthesis and repair, protein synthesis, wound healing, taste/smell perception, insulin storage and secretion (zinc-insulin hexamer in beta cells), testosterone synthesis (cofactor for 17-beta-hydroxysteroid dehydrogenase), and antioxidant defense (Cu/Zn-SOD, metallothionein induction). Picolinate chelation via picolinic acid (a tryptophan metabolite) enhances intestinal absorption via DMT1 transporters.
15-30mg elemental zinc (as zinc picolinate) daily
With food to minimize nausea. Separate from iron, calcium, and copper supplements by 2 hours. NOT with high-phytate meals.
ongoing (with copper balance — see notes)
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