Most calcium supplements only have 200-400 IU (international units) of Vitamin D and most folks in Northern climates need 1,000 to even 2,000 IU of Vitamin D3 daily.
Izongezo ezininzi zecalcium zine-200-400 IU (iiyunithi zehlabathi) yeVitamin D yaye uninzi lwabantu abakwimimandla ekumaNtla bafuna i-1,000 ukusa kuma-2,000 IU zevitamin D3 yonke imihla.