NutriStack
Doxycycline and Zinc Carnosine, timing-sensitive.
Zinc carnosine releases Zn2+ in the gut that binds doxycycline and reduces its absorption through chelation. The reduction is clinically meaningful and can compromise antibiotic efficacy.
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 Carnosine
- 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 carnosine releases Zn2+ in the gut that binds doxycycline and reduces its absorption through chelation. The reduction is clinically meaningful and can compromise antibiotic efficacy.
Mechanism. Zn2+ from zinc carnosine chelates the beta-diketone system of tetracyclines, forming insoluble complexes that block intestinal absorption.
Recommendation. Take doxycycline at least 2 hours before or 6 hours after zinc carnosine. 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 Carnosine 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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