I am using this brand more than 10 years, I never changed, very good quality, thanksMy hair was falling out so bad that I was nervous about it. Then my hairdresser suggested this product to get rid of the chemicals from the hair products I was using. Why? The hair products of other shampoos, hair spray and mouse, were building up on my hair and scalp so much so that new hair wasn't able to grow. Hair was falling out do to the build-up. Wasn't healthy for my hair or scalp. So this product gets rid of all the build-up of the hair products. Takes some time to do but now a few weeks later I see lots of new hair coming in and the loss of hair has slowed down tremendously. The thing is now my hair feels almost too clean. So now I will use this shampoo like everyother wash. Smells good too.Just the size I needed.I have used this foe years. I have sensitive skin and thin fine hair. It does not irritate my skin. It does not weigh down my hair. I have volume when I use this along with the conditioner. Great product to keep your hair and scalp healthyI have been using nioxin for 20 years. It would be nice if I could buy it again for $15.This was recommended by my hairstylist but it’s so reasonable from Amazon and this product works. Part of my problem was my thyroid and my hair was so thin and literally falling out but after using this shampoo plus the conditioner my hair has never been so healthy and thicker and grows like crazy. I would definitely recommend this to anyone with hair issues.It is a very good price to pay for this productI’ve lost so much hair since using. Even my friends had complained that everytime they staid over their hair got thinner. Then we realised it’s the shampoo. And I’ve been telling one of my friends about it without knowing that she has been using nioxin for a while too. She said she had just started to realise her hair thinning didn’t improve but got worsened. She was just looking for a better shampoo at the time.I tryed this shampoo few months ago and it is just amazing. I felt the difference from commercial shampoo after few times I was using it. Now are 9 months I am using Nixon System 1 cleanser and I am not going back to use other shampoo.Also I use to add few drops of jojoba oil.I really suggest this shampoo for everyone and 1000ml is enough for 5/6 months using once per day since you need just a small dose to wash your hairI ordered this product based on the image, which shows the new Nioxin logo bottle. The bottle I received was a much older label. Really frustrating not to be able to trust the product image shown.Good value considering it’s size and how long it lasts.The only issue is knowing how effective it is, it is part of a 3 step system. Shampoo, conditioner and a spray.As a man with thinning hair, I dare not stop using it in case I lose more hair. A catch 22! So it is hard to tell how effective the product is.I got this for my husband and am very pleased with seeing the results. He is thinning on top, but this product makes what he has appear thicker. It also keeps his hair looking nicer longer.