Our Biotin Hair Thinning Serum is specially designed for those who need to moisturize their roots, add thickness, repair their hairline and enhance their hair strength. First, our products are rich in biotin, an important B vitamin widely recognized as one of the key ingredients for promoting hair growth and health. Biotin penetrates into the hair roots, providing them with essential nutrients, promoting hair growth and increasing hair thickness. Secondly, our hair density serum also contains a variety of moisturizing ingredients, such as plant essences and natural oils, which can deeply moisturize the roots and hair to prevent dryness and breakage. These ingredients also repair damaged hairlines, making hair look healthier and more natural. In addition, our products contain Intensive Hair Serum, a formula specifically formulated to target breakage-prone and brittle hair. It increases hair strength and elasticity, reducing breakage and shedding, making hair healthier and stronger. Finally, our Biotin Hair Loss Serum is very easy to use. Simply apply an appropriate amount to damp, shampooed hair, gently massage into scalp and roots, then rinse with warm water. Use it once daily for a few weeks and you'll notice your hair becomes thicker, healthier, and shinier. All in all, our Biotin Hair Serum is a multi-purpose hair care product that hydrates roots, adds thickness, repairs hairline, and strengthens hair. Whether you have thinning hair, a jagged hairline, or are prone to breakage, our products can help restore healthy, thicker hair.