Search results for hormones

“Vitamin D is a steroid hormone that is a major regulator of immune function and plays a particularly important role in preventing respiratory tract infections. Vitamin D activates the innate immune system, which elicits an early antiviral response.”

“In response to the amount of blue light, melanopsin signals the brain to produce or repress melatonin production, a hormone that induces sleep. Therefore, dimming lights and avoiding devices in the evening allows melatonin to rise naturally.”

Jim Kean is the CEO of National Pro Grid League (NPGL) and founder of WellnessFX.

“Some evidence suggests that creatine supplementation may alter levels of male steroid hormones. For example, a study involving 20 college-aged rugby players found that after a week of creatine loading and two weeks of a maintenance dose, the men's serum testosterone levels did not change.”

“The functions of T cells are in part regulated by the zinc-dependent hormone thymulin. Thymulin drives the differentiation of T cells and downregulates proinflammatory signals while upregulating the release of anti-inflammatory signals.”

“Dietary fat also matters to steroid-hormone physiology: a meta-analysis found modestly lower testosterone on low-fat diets than higher-fat diets, without establishing that saturated fat or any one food should be used as a testosterone treatment.”

“Rumination, the practice of dwelling on external stressors to excess, can set in motion a cascade of hormonal and physiological responses that harm mental and physical health. Meditation has been shown to reduce rumination and its negative effects, however, and influences the gene expression of as many as 500 genes, many of which are in the brain.”

“Vitamin D is converted into a hormone that signals through the vitamin D receptor and helps regulate gene activity. The body can make vitamin D3 in skin exposed to UVB light, but synthesis varies with season, latitude, time of day, skin pigmentation, sunscreen use, and age.”

“The parasympathetic nervous system's primary function is to control homeostasis, allowing the body to conserve energy as it slows the heart rate, to increase gut motility and hormonal activity, and to relax sphincter muscles in the gastrointestinal tract.”

“For example, daytime work environments are often low light, inducing sleepiness. But bright lights from televisions or shift work environments in the evening or nighttime impair the release of melatonin, a hormone that promotes sleep, inducing wakefulness.”