NutriStack
Doxycycline and Zinc Picolinate, timing-sensitive.
Zinc binds doxycycline in the gut and forms insoluble chelate complexes that reduce antibiotic absorption. The interaction occurs with all zinc forms including picolinate. Reduced doxycycline levels can compromise treatment of infections like Lyme disease or chlamydia.
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
- Doxycycline and Zinc Picolinate
- Pair type
- Timing Sensitive
- Evidence (highest tier)
- Strong
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored timing-sensitive row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Timing Sensitive · Strong evidence
Timing Sensitive
What is happening. Zinc binds doxycycline in the gut and forms insoluble chelate complexes that reduce antibiotic absorption. The interaction occurs with all zinc forms including picolinate. Reduced doxycycline levels can compromise treatment of infections like Lyme disease or chlamydia.
Mechanism. Zn2+ chelates the beta-diketone system of tetracyclines, forming insoluble complexes in the intestinal lumen that are not absorbed.
Recommendation. Take doxycycline at least 2 hours before or 6 hours after zinc picolinate. Do not co-administer.
Minimum separation. 360
Stack Score
How this pair moves the number.
Effect on the composite score
If both Doxycycline and Zinc Picolinate are in the same stack, this pair applies −5 to your Stack Score (per scored timing-sensitive row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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