Donnas Recipe Strength Hair Oil is packed with 18 all-natural oils and powders to stimulate hair follicles to help extend the hairs growth cycle. Formulated Without: Animal products Parabens Formaldehyde Sulfates How to Use: Do a patch test 24 hours prior to application. Use dropper to apply directly on the scalp. Best if used daily and massage in the scalp 5 - 10 minutes. Also, great to use on wet hair for maximum penetration. A little goes a long way, start with a little and build if you need more to massage into scalp. Patch tests are an easy way to help determine if you may experience a negative initial reaction to a new product. It is recommended to perform a patch test before incorporating any new product into your regimen. We have outlined a general method for conducting your own patch test below based on the type of product. Apply a small amount of the product onto a clean area of skin on the upper forearm. Keep the area dry. If the product has a specified duration of use, rinse off after this time has elapsed. Otherwise, rinse off after 24 hours. If any redness, burning, itching, blistering, or irritation is observed at any time throughout the test, do not use the product.