Insights & Discussion
A daily intake of 50 grams of prunes can maintain hip bone density in postmenopausal women, potentially reducing hip fracture risks.
This research was conducted through a single-center, parallel-arm, randomized controlled trial over the course of a year. Postmenopausal women were randomly assigned into three groups - control, 50 grams of prunes, and 100 grams of prunes - and their bone mineral density (BMD) was assessed every 6 months. Secondary measurements included an observation of changes in bone biomarkers. Compliance and retention of participants were high particularly at the 50-gram dosage.
In assessing the effects of prunes on bone health, the findings showed a distinct interaction between the amount of prune intake and bone mineral density in the hip region. Specifically, it indicated that consumption of 50 grams of prunes daily led to a preservation of hip BMD after 6 months, an effect which was still apparent after a year. Despite a higher dropout rate and less impact on BMD, the 100-gram prune group, when combined with the 50-gram group, presented stability in the FRAX score, which measures the risk of hip fractures.
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Dried plum consumption enhances bone mineral density in postmenopausal women, primarily by reducing the rate of bone turnover.
2011 British Journal of Nutrition Comparative effects of dried plum and dried apple on bone in postmenopausal women Hooshmand S, Chai SC, Saadat RL, Payton ME, Brummel-Smith K, Arjmandi BH
Randomised Controlled Trial Bone Mineral Density Osteoporosis Plum
The research studied 160 osteopenic postmenopausal women from 1 to 10 years postmenopause, who were not receiving any hormone replacement therapy or medication affecting bone metabolism. Participants were randomly divided into two treatment groups, one consuming dried plums and the other eating dried apples, with both groups also receiving daily dosages of calcium and vitamin D. Bone mineral density was measured at the beginning and end of the study using dual-energy X-ray absorptiometry. Blood samples were taken at the start, then every 3 months to evaluate bone biomarkers. Physical activity and dietary factors were monitored as potential covariates throughout the study.
Dried plums significantly boosted the bone mineral density in the ulna (one of the two bones in the forearm) and spine compared to dried apples. This tendency could only be seen in dried plums - they drastically reduced serum levels of bone turnover markers, specifically bone-specific alkaline phosphatase and tartrate-resistant acid phosphatase-5b. This confirms that dried plums can indeed improve the bone mineral density in postmenopausal women, in part by suppressing the rate of bone turnover.