NutriStack
Copper and Zinc Picolinate, a caution.
Chronic high-dose zinc picolinate supplementation (>40mg/day) can induce copper deficiency by upregulating metallothionein, which binds copper in enterocytes.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
Same shape as the other 1,729 pairs in the public database.
From the interaction database
What the row says.
Every entry follows the same shape: what is happening, the mechanism, the recommendation, and the primary literature.
At a glance
- Substances
- Copper and Zinc Picolinate
- Pair type
- Caution
- Evidence (highest tier)
- Strong
- Source citations
- 3 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Supplement
- Last verified
- May 30, 2026
Caution · Strong evidence
Caution
What is happening. Chronic high-dose zinc picolinate supplementation (>40mg/day) can induce copper deficiency by upregulating metallothionein, which binds copper in enterocytes.
Mechanism. Zinc Picolinate induces metallothionein in intestinal cells, which preferentially binds copper, trapping it in enterocytes that are later shed, causing copper loss.
Recommendation. If supplementing zinc picolinate >25mg daily, add 1-2mg copper. Many zinc picolinate supplements include copper for this reason. Monitor copper status.
Stack Score
How this pair moves the number.
Effect on the composite score
If both Copper and Zinc Picolinate are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
Check your full routine
One pair was the worked example. NutriStack runs every pair in your stack at once.
Drop in your supplements and prescriptions and the public database surfaces every interaction, synergy, timing rule, and contraindication, every one linked to its primary source.