The shopper was so impressed, she had already repurchased the rosemary oil.
"On my second bottle, would highly recommend to someone with bad hair," she said.
Don’t underestimate a ‘firm’ method to trigger hair growth, says expert – there are some at-home remedies too
She rated the hair regrowth oil a full five stars out of five, calling it "amazing."
The woman added that she would definitely recommend the product to a friend.
According to the description, the product contains "more than 30 essential oils and nutrients."
The hair oil is designed for both daily hair use or specific scalp treatments.
Infused with Biotin, the product is said to address most haircare concerns.
What is PCOS and how does it affect your hair?
Polycystic ovary syndrome is a condition that affects how the ovaries work.
Symptoms include include irregular periods, facial hair, and difficulty getting pregnant.
PCOS is a hormonal imbalance, which can lead to an excess of androgens, such as testosterone, which can cause female pattern baldness.
"From supporting length retention and nourishing hair follicles to smoothing split ends and preventing dry scalp," the manufacturers said.
According to experts, rosemary oil is effective for boosting hair growth.
A study published by the National Library of Medicine found that a test group "experienced a significant increase in hair count at the six month endpoint" after applying the hair oil.