- The Andrea Hair Growth Essence 20ml is specially prepared from ginger, ginseng, loca festival, fleece-flower root and grape seed oil. It works like magic when applied. To use this product add 3ml of Andrea serum to 100ml quantity of shampoo and use to wash hair. This product stimulates your scalp and improves your hair growth. This Andrea hair serum is made from natural ingredients that does not have any side effect. The Andrea hair serum can be used by men and women except for pregnant women. it’s a great formula for receding frontline in females.