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This study evaluates whether the consumption of California dried plums can be beneficial to your health. Previous studies using dried plums have shown beneficial effects on bone and cardiovascular health. In addition the investigators hope to learn how dried plums might change your bowel habits, and if the carbohydrates in the plums are fermented in your digestive tract.
The aging of the U.S. population presents a number of challenges, many of which that can be addressed through nutritional approaches. Postmenopausal women are particularly at-risk for a number of diseases such as osteoporosis (By 2020 it is estimated that 50 percent of women at 50 years and older will either suffer from or be at-risk of bone loss), and cardiovascular disease, the number one killer of postmenopausal women. Polyphenolic compounds in fruits and nuts have been the focus of extensive research regarding their potential to reduce risk for a number of chronic diseases. All fruits are not created equally, so determining if dried plums (Prunus domestica L.) have certain phytochemicals in amounts that promote health when consumed in realistic amounts is important. This demonstration is likely to impact market demand for dried plums. Indeed, favorable research on other California specialty crops (walnuts, almonds, strawberries, grapes) is a key strategy to help growers increase sales.
While hundreds of plum cultivars exist, with varying amounts of phenolic compounds, the process of drying results in high amounts on hydroxycinnamic acids, a family of compounds that have been shown, in animal models, to be protective of bone health by both reducing bone loss and improving bone growth. Hydroxycinnamic acids have also been proposed to improve vascular function by protecting the smooth endothelial lining of the blood vessels in animal models. Whether these encouraging observations also occur in humans is unknown. Therefore, the overall objective of this project is to conduct the first human study exploring the effects of California dried plums on markers of bone health and vascular function. Favorable results from this project will increase awareness of the unique benefits of dried plums for bone health and vascular health, two topics of great interest to aging baby boomers and other health-conscious consumers, both in the U.S. and internationally.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Two Dried Plums per day | Experimental | Two Dried Plums per day is approximately 14 g. |
|
| Six Dried Plums per day | Experimental | Six Dried Plums per day is approximately 42 g. |
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Two Dried Plums per day | Other | Subjects will consume Two Dried Plums per day |
|
| Measure | Description | Time Frame |
|---|---|---|
| C-telopeptide, beta-cross-linked (CTX), a marker of bone resorption | To determine whether short-term (two weeks) intake of California dried plums will improve markers of bone health, as measured by a serum marker of bone remodeling called C-telopeptide, beta-cross-linked (CTX) | Change measures ("baseline and 2 weeks") |
| Measure | Description | Time Frame |
|---|---|---|
| Peripheral artery tonometry (PAT), a vascular function measure | To determine whether short-term (two weeks) intake of California dried plums will improve vascular function, as measured using peripheral artery tonometry (PAT). | Change measures ("baseline and 2 weeks") |
| Breath hydrogen |
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Inclusion Criteria:
Exclusion Criteria:
(using NCEP calculator http://cvdrisk.nhlbi.nih.gov/calculator.asp);
The following special populations will be excluded:
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| Six Dried Plums per day | Other | Subjects will consume Six Dried Plums per day |
|
To determine the extent in which dried plum intake changes colonic fermentation products in dried plums. |
| Change measures ("baseline and 2 weeks") |
| Complete metabolic panel | Blood analyses will include measurements of complete blood cell count, comprehensive metabolic panel, and lipid profile. | Change measures ("baseline and 2 weeks") |
| Body weight | Body weight will be recorded at baseline and after two weeks of dried plum intake. | Change measures ("baseline and 2 weeks") |
| Blood pressure | The baseline office blood pressure measurement will be obtained (3 measurements 5 minutes apart after a 15 minute rest). | Change measures ("baseline and 2 weeks") |