Ulta and Sephora carry specialized peppermint scalp serums, such as the Pattern Scalp Serum.

Etsy is a great source for organic, small-batch blends often mixed with other growth-promoting ingredients like rosemary or castor oil.

Peppermint oil is widely available at major retailers and specialty shops, ranging from pure essential oils that require dilution to pre-mixed scalp serums. Where to Buy Peppermint Oil