Powered by a unique complex of active ingredients, this ultra-concentrated serum works to increase the thickness of each strand.Hair Type: Fine, thin hair.To use: Use on towel-dried hair or dry hair. Start by applying 20 drops directly onto the scalp and hairline. Massage in well. Smooth any excess product through the length of your hair. Do not rinse. Use once per day. Do not apply to eyelashes or eyebrows. Discontinue use if irritation or redness occurs.