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The first time I bought this shampoo in 2018, it did wonders to my hair. When I ran out of it in late 2019, I bought some more, but they must have changed the chemical formula because the shampoo irritated my scalp to the point I have blisters and now I have to use a super-mild shampoo for them to heal.
The product arrived in good condition. I’ve been using both the shampoo and conditioner for approximately 6 months almost exclusively (with breaks only for the occasional business trip). I don’t notice any difference in my hair thickness, propensity to break, or overall appearance (compared to regular shampoo and conditioner). Given the exorbitant price, I would have expected some sort of improvement in these factors. As such, I can not recommend this product.