Cordyceps. Cordyceps mushroom contains the bioactive cordicepine, an adenosine derivative, that has been shown to increase the expression of interleukin (IL) -10, an anti-inflammatory cytokine and decreased the expression of IL-27. In other studies, the regulatory effects of the entire fungus on human immune cells are reported (8), showing an interesting immunomodulatory and immunostimulating action.
Cordyceps was reported to improve physical performance, to reduce the sense of fatigue and to increase energy performance1. Taken regularly, this mushroom combats aging, oxidative stress and prevents problems related to senility, as demonstrated by one study conducted in elderly patients, in which the reduction of fatigue, the perception of cold and dizziness was observed after administration of 3g/day of Cordyceps for six weeks (9). Cordyceps also improves oxygen uptake, aerobic capacity, ventilation and fatigue resistance during exercise, as reported in in vivo studies10 and clinical trials (10,11). Other studies have reported antioxidant activity and increased concentration and memory after Cordyceps extract administration. In particular, the effect on lipid peroxidation in rat brain homogenates was studied and tests and cognitive performance were performed in mice treated with ethanol using the passive avoidance test and in mice aged by D-galactose to analyze the antiaging effect, on the ‘learning and memory using the test of avoidance performance in water and step-down type. The study showed that CSE can improve brain function and antioxidant enzyme activity (12,13).
Ashwagandha. Ayurveda is one of the oldest medical practice in India, Sri Lanka and other South Asian countries and has a solid philosophical and experiential basis. Ayurveda has different formulations for the management of stress and physical and mental condition.
In Ayurveda, ashwagandha has been used as an adaptogen, anti-stress tonic and for the treatment of general debilitation (14).
In experimental models such as the forced swimming resistance test in rats, it has been shown to increase resistance and prevent variations of ascorbic acid and cortisol in the adrenal gland following induced stress (15). In models of neurodegenerative pathologies such as Alzheimer’s and Parkinson’s disease in which the functional impairment is due to the interruption of the neural network and the premature death of neurons, the ashwagandha extract has shown good therapeutic potential leading to the formation of dendrites and induction of sleep and relaxation with an action similar to GABA (16-18).
The brain is very sensitive to stress: even mild and uncontrollable stress can cause rapid and dramatic loss of cognitive ability. Oxidative stress also contributes to a wide range of brain disorders and dementia including Parkinson’s, Alzheimer’s and Huntington’s disease. Ashwagandha extracts have an enormous ability to protect neuronal cells from different types of stressors that alter brain function leading to memory, cognition, and predisposition to stroke and neurodegenerative pathologies (14).