Biota Botanicals Advanced Herbal Care Serum for Thinning - Damaged Hair (12 x 0.34 oz) - 3 Pack BIOTA Botanicals Advanced Herbal Care Leave-In Serum is a highly concentrated form of our proprietary Herbal BioComplex B11! Perfectly suited for all hair types, textures and lifestyles, our Leave-In Serum is powerful, yet gentle enough to be left on the scalp all day or even over multiple days between washings. For those who don¹t wash their hair every day, no worry, the Leave-In Serum is not greasy and is virtually scent-free. This powerful blend brings new hope to those who want to combat thinning - damaged hair, helping in the fight to maintain and encourage stronger, more resilient hair and can only be found in BIOTA Botanicals’ products. For best results, use daily and in conjunction with BIOTA Botanicals Advanced Herbal Shampoo and Conditioner 3 PACK x 12 x 0.34 oz