Both inhibit platelet aggregation and the blood-thinning effect may be additive.
Garlic and curcumin both reduce platelet aggregation through different pathways.
Generally safe at food-level doses. Inform your doctor if using concentrated extracts of both.
Known drug category interactions for these supplements. Especially relevant if you take prescription medications.
Concentrated garlic supplements may mildly enhance anticoagulant effects.
Food-level garlic is generally fine. Inform your doctor if taking concentrated garlic extract with blood thinners.