Based on my experience, ginseng from Cheong Kwan Jang worked really well on me. Okay. Actually I dont feel any immediate effect having ginseng (except a little boosted libido). Looking back about a year I have been having it, I found that it actually works for me by improving my immune system.I used to get sick by getting a cold about 3 or 4 times a year and each one lasts about a week. I had ginseng from Cheong Kwan Jang regularly for almost a year and I havent gotten a cold since then. One morning about a month ago, while I was traveling continuously, I felt sore throat. I was 100 percent sure that I would get a cold because my throat wouldnt be able to filter out viruses effectively. I didnt get a cold! The number changed from 4 to 0. There are other various health benefits, but its difficult for me to measure that.I dont think ginseng is super scientifically proved, and Im not a medical doctor. Its only based on my experience. Cheong Kwan Jang grows the best 6 year ginseng in the world. The soil of ginseng farm is very important for effective ginseng.It is said that Korean Oriental(herbal) doctors dislike ginseng because regular ginseng consumers dont need any other various herbs. Its traditional Korean preventive care.Give it a try for about 6 months. After that you may never get sick, if it works for you.They sell various of products including cosmetic cream and tea.