Shampoo for thin and thinning hair Reconstruct quickly removes any stubborn styling. It contains proteins and keratin, which increase the diameter of the hair and strengthen the hair shaft from the inside. Strengthening shampoo restores weakened and thin hair, adding volume. The vitamins and collagen included in the composition moisturize and nourish the hair, sealing moisture inside the hair shaft. After the first use, the hair becomes noticeably thicker and denser. The masculine woody aroma is emphasized by the perfume.