This product is amazing!!! I used to get cold sores all the time, at least one a month for the past 30 years. They were really sore, unsightly and an embarrassment, and would usually last 7-10 days from onset to fully healed. A friend told me about Lysine and although I was a bit skeptical - after spending hundreds of dollars over the years on other cold sore creams and patches that didn't really work - I was desperate to find a solution. I read the reviews on the products you sell and decided to buy Go Healthy Go Lysine 1000 mg . I'm so glad that I did!I take one capsule every single day as a preventative, and if I do start to feel a tingle then I take 2 capsules twice a day for five days (i.e. 4 capsules per day - my pharmacist said this was fine to do). Since beginning to take this product about a year ago I have had NO cold sores develop and the 5-6 times that I felt the tingle I have stopped it in its tracks with the additional capsules. I recommend this product to everyone! It's such a great price on HealthPost and I usually buy in bulk when it's on special. I can't recommend this product highly enough, you have to try it. I'm thrilled!!!