John asked if magnesium had to be present as well for calcium to be absorbed. We know that vitamin D helps calcium to be absorbed from your food. I checked the texts and there was no mention of magnesium being critical for calcium absorption. Some sources of calcium are also pretty good for magnesium too. A cup of reduced-fat milk has about 35 mg magnesium and 200g of yogurt has around 40 mg, about 10% of your daily needs.
Hannah asked if removing fat from milk, making it skim milk, had any effect on calcium absorption. Had to get the sniffer dogs onto that one too. The word is that the fat content doesn’t influence the amount of calcium absorbed from milk. That’s good news because skim milk generally has a higher calcium content, and less kilojoules, compared to full cream milk.