Adults need at least 1,000 to 2,000 international units (IU) of vitamin D daily in order to absorb calcium.
Abantu abadala kufuneka bafumane ubuncinane iiyunithi zehlabathi (IU) ezili-1,000 ukusa kuma-2,000 zevitamin D yonke imihla ukuze ifunxeke icalcium emizimbeni yabo.