View clinical trials related to Aging.
Filter by:With this study, the investigators will like to determine if taking a dose of the study medication, called Polypodium leucotomos (PL), prevents some of the changes in the skin caused by the adverse effects of UVA, a type of ultraviolet light.
The purpose of this study is to examine the consequences of chronic sleep restriction on nighttime sleep, daytime alertness, performance and memory functions, and metabolic and cardiovascular function, and to determine if the consequences of chronic sleep restriction differ between healthy young and older adults.
The study will evaluate whether taking a nutritional supplement designed to increase macular pigment in the eye can improve a person's ability to adjust to darkness. Patients will be assigned to take either a placebo or nutritional supplement for 8 months. Vision will be assessed at baseline, 4 months, and 8 months.
The purpose of this study is to determine whether treatment of healthy older men and women with oral MK-677 for 12 months will enhance pulsatile GH release and increase mean GH and IGF-I concentrations into the range of young adults and will have favorable effects on body composition and functional ability on older adults.
The purpose of this study is to examine the effects of several doses of vitamin D on hormones related to bone, calcium absorption, bone density and muscle strength.
The purpose of this study is to determine if the use of ibuprofen blocks the benefits of exercise to build bone and muscle mass.
Older patients with cancer are poorly treated or not treated at all. A previous study in the south west of France (364 patients) showed that patients receiving chemotherapy had short survival times which strongly depended on nutritional status. In this study, the researchers would like to evaluate if individual dietician follow-up at each cycle of chemotherapy increases survival of patients at risk of undernutrition.
The purpose of the study is to study the effects of aging, estrogen and progesterone on the brain. Specifically, we want to look at how the hypothalamus and pituitary (two small glands in the brain) respond to estrogen. The pituitary gland is controlled by the hypothalamus. The hypothalamus secretes GnRH (Gonadotropin-Releasing Hormone) that signals the pituitary to secrete the reproductive hormones, LH (Luteinizing Hormone) and FSH (Follicle Stimulating Hormone). These hormones act on the ovaries and signal the ovaries to produce estrogen and progesterone. Estrogen in the bloodstream then acts on the brain to modulate this system with changes in LH and FSH. Early changes associated with low levels of estrogen are inhibitory (estrogen negative feedback) while higher levels of estrogen (such as those present when a follicle in the ovary is ready to ovulate) stimulate LH to cause ovulation (positive feedback). This study will determine: 1) hypothalamic and pituitary levels of glucose uptake (as a measure of brain metabolic activity) at baseline and in association with estrogen negative feedback on LH (24 hr) and estrogen positive feedback on LH (72 hr); and 2) the effect of aging on estrogen feedback on LH, assessing negative feedback (nadir ~ 24 hr) and positive feedback (peak between 72 and 96 hr).
The purpose of this study is to test the efficacy of a new couples counseling intervention for people recently diagnosed with early Alzheimer's disease and their spouses. The study hypothesis is that counseling the couple shortly after the diagnosis, and while the functional impact of the illness is still relatively mild, will have a significant impact on their ability to provide support for each other.
The purpose of this study is to examine the effect of aerobic fitness training on human cognition, brain structure, and brain function of older adults.