What potential risk necessitates consulting a healthcare provider regarding high black currant intake?

Individuals on medications affecting blood thinning should consult regarding Vitamin K content

Although black currants are highly beneficial, their nutrient density requires consideration for individuals managing specific medical conditions or taking certain pharmaceuticals. Because black currants contain Vitamin K1, which is directly involved in the blood clotting mechanism, individuals prescribed blood-thinning medications (anticoagulants) must exercise caution. Significant dietary changes centered on foods rich in Vitamin K can potentially interfere with the efficacy or required dosage of these medications. Similarly, due to the berry's effect on blood vessel dilation and blood pressure regulation, those on related medications should seek professional advice before substantially increasing their consumption.