Ah, sebab when you breastfeed, your body pulling calcium from your bones to pass through the breastmilk to baby, it's a lot of mineral transfer happening, so kena top up intake to 1,300mg per day to protect your own bones jugak. A few of us mums discuss this during postnatal checkups, and honestly the calcium needs are serious because deficiency boleh lead to bone issues down the road, so better start early with proper diet or supplements.