This is the finding of a randomised double-blind controlled trial among institutionalised women with a mean age of 85.5 years. During the 56-day trial, the participants consumed two 125-g servings of yogurt – either fortified with calcium and vitamin D or not – as part of their daily diet. The two fortified yoghurts provided supplemental levels of vitamin D (10 mcg/day) and calcium (800 mg/day).