The adrenal fatigue is small triangular-shaped glands located in the upper part of each kidney. The pituitary gland, located in the brain, stimulates the adrenal fatigue to produce a variety of hormones such as cortisol. In response to chronic emotional or physical stress, the adrenal fatigue secrete cortisol constantly; Over time, the adrenal glands become fatigued and produce less cortisol, which causes general malaise and an inability to cope with stress. Certain adrenal fatigue supplements reviews may support suprarenal function and decrease adrenal fatigue; However , they may cause side effects . Sleep disorders adrenal fatigue supplements, such as Rhodiola rosea, licorice and adrenal extracts, promote the function of the adrenal glands. Promotion of the function ; However , it can lead to sleep disorders such as insomnia . Insomnia is defined as the difficulty of falling asleep and staying dormant for more than three days a week. The st