NutriStack
Curcumin Phytosome and Diclofenac, a caution.
Curcumin phytosome may add antiplatelet effects to diclofenac's NSAID bleeding risk. Phytosome formulations are intended to improve curcumin absorption, making supplement-dose exposure more relevant than culinary turmeric. Risk is higher with ulcer history, regular diclofenac use, procedures, or other blood-thinning medicines.
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At a glance
- Substances
- Curcumin Phytosome and Diclofenac
- Pair type
- Caution
- Evidence (highest tier)
- Emerging
- Source citations
- 2 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Emerging evidence
Caution
What is happening. Curcumin phytosome may add antiplatelet effects to diclofenac's NSAID bleeding risk. Phytosome formulations are intended to improve curcumin absorption, making supplement-dose exposure more relevant than culinary turmeric. Risk is higher with ulcer history, regular diclofenac use, procedures, or other blood-thinning medicines.
Mechanism. Curcumin can inhibit thromboxane formation and platelet calcium signaling, and phytosome formulations improve bioavailability. Diclofenac reduces gastric prostaglandin protection through COX inhibition, creating additive bleeding potential.
Recommendation. Avoid high-dose curcumin phytosome while using diclofenac regularly. If both are used, watch for bruising, nosebleeds, black stools, vomiting blood, or worsening stomach pain.
Sources (2)
- Jager R, Lowery RP, Calvanese AV, Joy JM, Purpura M, Wilson JM. Comparative absorption of curcumin formulations. Nutr J. 2014;13:11. PMID 24461029
- Shah BH, Nawaz Z, Pertani SA, Roomi A, Mahmood H, Saeed SA, et al. Inhibitory effect of curcumin, a food spice from turmeric, on platelet-activating factor- and arachidonic acid-mediated platelet aggregation through inhibition of thromboxane formation and Ca2+ signaling. Biochem Pharmacol. 1999;58(7):1167-1172. PMID 10484074
Stack Score
How this pair moves the number.
Effect on the composite score
If both Curcumin Phytosome and Diclofenac 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.
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