Cleanser Shampoo, System 4 (Color Treated Hair/Progressed Thinning/Dry Hair), 16.9 oz

I’ve been using Nioxin System 4 Shampoo for a few weeks now, and I’m impressed with the results. My hair feels thicker, looks fuller, and my scalp feels refreshed and clean without being stripped of natural oils. The shampoo lathers nicely and rinses out easily, leaving hair soft and manageable. I’ve also noticed a reduction in breakage, and styling feels easier overall. The scent is light and pleasant, not overpowering. While it’s not an overnight miracle, consistent use really makes a difference in hair volume and scalp health. Definitely a good choice for anyone dealing with thinning hair or looking to maintain healthy, thicker-looking hair.

This is a good shampoo for people with thinning hair. The scent is wonderful - sort of minty. I liked that it is for coloured, thinning hair. The one I bought first, was not colour compatible. Good product.

I love this shampoo. My hair turns out great and it has a nice smell

I’ve been using the Nioxin System 4 Conditioner (paired with the matching shampoo) for a few weeks now, and the difference is impressive. My hair is color‑treated and has been thinning for a while—this lightly moisturizing formula feels gentle yet powerful. It leaves my hair feeling soft and manageable, without any heaviness or greasiness. The texture is lightweight, yet hydrating—from scalp to ends. It’s formulated with peppermint and wild mint oils that invigorate the scalp, while caffeine, niacinamide, and biotin help strengthen hair at the root and promote a healthier scalp environment. Since using it regularly, I've noticed less shed during brushing and shower drain buildup, which used to clog weekly—now it's only occasional. My hair feels thicker and fuller overall, although I didn’t expect a dramatic regrowth—more like restoration. It helped stop the progression of hair loss; not necessarily added growth.