Let’s take it from the very beginning. Mielle was founded by Monique Rodriguez, whose mission was to fill a gap in the haircare industry. She developed products that her hair type needed but that she struggled to find on the beauty aisles. Enter: the Mielle Rosemary Mint oil, formulated as an intense nutrient-rich dose to support several hair concerns, from dry scalp to length retention, using natural ingredients and essential oils specifically for thicker hair.

The oil wasn’t marketed expressly for hair growth, but when beauty fans on TikTok got hold of it, they were keen to spread the word of its benefits. The star ingredient, rosemary oil, has been linked with hair growth in several studies. In fact, a 2015 study reported rosemary oil to be as effective as minoxidil, a medication used for the treatment of high blood pressure and hair loss.

It’s thought that rosemary oil can work to speed up the process of cell turnover and growth, while mint oil in the formula is great for stimulating the scalp. The menthol in peppermint is a vasodilator, which improves blood flow. The idea is that more blood flow means more circulation, which means more hair growth.

Does rosemary oil actually help your hair grow? Everything you need to know