Role of Centrum® Silver® in Improving Micronutrient Status in Older Men
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|ClinicalTrials.gov Identifier: NCT03004807|
Recruitment Status : Recruiting
First Posted : December 29, 2016
Last Update Posted : July 17, 2018
|Condition or disease||Intervention/treatment||Phase|
|Vitamin Deficiency Mineral Deficiency Aging||Dietary Supplement: Centrum Silver Mens' Formula Other: Control||Not Applicable|
Older adults are at increased risk of various chronic diseases, in which inadequate levels of vitamins and minerals may play a significant role, including cardiovascular disease, Alzheimer's disease, liver disease, and cancer. Most adults in the United States do not meet the Recommended Dietary Allowance (RDA) or Adequate Intake (AI) of many vitamins and nutritionally-essential minerals from diet alone, including vitamins A, C, D, E and K, calcium, magnesium, and potassium. Older adults are particularly susceptible to micronutrient inadequacies because of limited absorption, increased requirements, or - in the case of vitamin D - decreased synthetic capacity in the skin. Thus, there is a strong rationale for supplementing the diets of older adults with a multivitamin/multimineral supplement, such as Centrum® Silver®. However, little is currently known about the bioavailability of the Centrum® Silver® formula in this age demographic.
Epidemiological studies and recent clinical trials have shown that use of multivitamin/mineral supplements has beneficial effects on disease risk in men, including those of advanced age. It is assumed that these benefits of multivitamin/mineral supplements are achieved through changes in nutrition status. However, it has never been documented if there are concomitant changes in micronutrient levels in individuals who consume these supplements. Furthermore, changes in nutritional status in older individuals taking multivitamin/multimineral supplements are a subject that has yet to be explored.
Therefore, this study seeks to recruit men who are in generally good health, 70 years of age or older, to assess their vitamin and mineral status before and after six months (approximately 24 weeks) of supplementation with Centrum® Silver®. The investigators hypothesize that consuming multivitamin/multimineral supplements everyday will result in measurable increases in the status of one or more vitamins or minerals in the body. Concentrations of several vitamins and minerals in blood samples will be performed, along with a general assessment of micronutrient status in white blood cells (primary outcomes). To see if these changes in nutrition status impact other aspects of human health, changes in lipid and lipoprotein profiles, antioxidant status, metabolic health, and inflammation and treatment differences in cognitive function will be assessed (secondary outcomes). Centrum® Silver® supplementation may or may not have any effect on these secondary outcomes, when compared to a placebo, unless there are measurable changes in the primary outcomes.
The expectation is that the results of this research will add to a general understanding of multivitamin/mineral supplements and how well they can improve the nutritional status of older adults. By employing direct and functional methods to assay for nutritional content, this study will determine how well these methods correlate and by using both assay methods unique insight into the mechanism(s) whereby multivitamin/multimineral supplements might or might not lead to improvements in health may be ascertained.
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||40 participants|
|Intervention Model:||Parallel Assignment|
|Masking:||Triple (Participant, Care Provider, Investigator)|
|Primary Purpose:||Basic Science|
|Official Title:||Role of Centrum® Silver® in Improving Micronutrient Status in Older Men|
|Actual Study Start Date :||July 1, 2018|
|Estimated Primary Completion Date :||October 2019|
|Estimated Study Completion Date :||November 2020|
Centrum Silver Men's Formula Multivitamin/Multimineral Supplement: 1/day
Dietary Supplement: Centrum Silver Mens' Formula
Multivitamin/Multimineral dietary supplement produced for Pfizer for use in older men.
Other Name: Centrum Silver Men
Placebo Comparator: Control
Matching tablet to active multivitamin arm: 1/day
A matching tablet to the dietary supplement, but without any active ingredients
Other Name: Placebo Comparator
- Changes in Plasma and Blood Cell Vitamin and Mineral Levels [ Time Frame: Between baseline (visit 3) and 6 months after intervention begins (visit 7) ]Blood samples will be collected at baseline and end of intervention. Plasma levels of beta carotene, pyridoxine (vitamin B6), cobalamin (vitamin B12), ascorbic acid (vitamin C), 25-hydroxy vitamin D, α- tocopherol (vitamin E), and phylloquinone/menaquinones (vitamin K) will be determined. Analyses will be performed for absolute values and values corrected for total lipids where necessary. Folate will be assessed in red blood cells. Minerals analysis by inductively coupled plasma atomic emission spectroscopy (ICP-AES) will be performed in plasma or lymphocytes.
- Lipid Status [ Time Frame: Between baseline (visit 3) and 6 months after intervention begins (visit 7) ]Changes to fasting lipoprotein and triglyceride status
- High Resolution Respirometry [ Time Frame: Between baseline (visit 3) and 6 months after intervention begins (visit 7) ]Isolated white blood cells will be evaluated in the Oroboros Oxygraph (Innsbruck, Austria) to evaluate the capacity of mitochondria to sustain respiration/energy demands
- Cognitive abilities [ Time Frame: Between cognitive baseline (visit 2) and 6 months after intervention begins (visit 6) ]Cognitive abilities will be assessed by the following NIH Toolbox measures: Picture Vocabulary, Flanker Inhibitory Control and Attention Test, Sorting Working Memory Test, Dimensional Change Card Sort Test, Pattern Completion Processing Speed Test, Picture Sequence Memory Test, and Oral Reading Recognition Test. The individual test scores are based on time and accuracy, will be normalized to scaled scores, and averaged to obtain a Fluid Cognition Composite score, as calculated by the NIH Toolbox scoring algorithms. Significant changes in total score after intervention, or between intervention and control groups will be recorded. Logical Memory will be tested with recall of narrative story both immediate and delayed as described in WMS-IV Protocol. Additionally, a "Head-Toes-Knees-Shoulders Task" that combines physical activity with processing speed and accuracy will also be assessed at the completion of each session.
- Spatial memory as assessed by a virtual water maze [ Time Frame: At visit 6, approximately 6 months after intervention begins, 1 week before visit 7 ]A computerized environment will be presented for the subject that can be navigated with a joystick. The goal is to find a hidden platform based on spatial clues. Search accuracy for the target platform in the environment will be assessed between trials. Changes in proximity to the platform will be compared between successive trials in an individual, and also between individuals in the placebo control and multivitamin intervention groups.
- Crystallized cognitive abilities [ Time Frame: 1 week before intervention begins (visit 2) and 1 week before intervention ends (visit 6) ]Crystallized abilities will be assessed with NIH Toolbox Oral Reading Recognition Test and NIH Toolbox Picture Vocabulary Test. The individual test scores will be determined after adjusting for computer adaptive testing, normalized to scaled scores, and averaged to obtain a Crystallized Cognition Composite score, as calculated by the NIH Toolbox scoring algorithms. Significant changes in total score after intervention, or between intervention and control groups will be recorded.
- Activity Monitoring [ Time Frame: Between visit 2 and visit 3 (duration: 1 week) and visit 6 and visit 7 (duration: 1 week) ]Wrist activity monitors (FitBit, commercial model) will be worn by subjects at the given intervals. General activity level, calories burned, heart rate, and steps taken will be recorded to give a general assessment of "energy level".
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03004807
|Contact: Alexander J Michels, PhD||541-737-8730||Alexander.Michels@oregonstate.edu|
|Contact: Sandra Uesugi, RN||541-737-3594||Sandra.Uesugi@oregonstate.edu|
|United States, Oregon|
|Linus Pauling Science Center||Recruiting|
|Corvallis, Oregon, United States, 97331|
|Contact: Alexander J Michels, PhD 541-737-8730 Alexander.Michels@oregonstate.edu|
|Contact: Sandra Uesugi, RN 541-737-3594 Sandra.Uesugi@oregonstate.edu|
|Principal Investigator: Tory M Hagen, PhD|
|Sub-Investigator: Kathy Magnusson, PhD, DVM|
|Principal Investigator:||Tory M Hagen, PhD||Oregon State University|