Aswagandha ( Withania somnifera) :  Root of this  plant is used as a medicine in Ayurveda.Its used in homeopathy and Unani  too. 

 Medicines like Aswgandha rasayana are  used to increase/regain  immunity   power after deceases. These medicines are good for to regulate blood sugar. Good  for  improving thinking and understanding.It purifies blood, reduces cholesterol and  strengthens  nervous system.Its used for fertility problems too. 

The real quality behind all this is  Adaptogen: normalizes all hormones, natural health regains.