Mielle's Rosemary Mint Scalp & Hair Strengthening Oil is a soybean- and castor-based oil blend with rosemary, peppermint, tea tree and other essential oils plus biotin. The brand pitches it for nourishing the scalp, smoothing split ends and helping length retention, including on braids and protective styles. It went viral as a hair-growth oil, though Mielle itself promises nourishment and length retention rather than regrowth, and the rosemary content is undisclosed. Users like the price and tingly mint feel; the heavy oils and strong scent will not suit everyone.

Best for

Coily and curly hair or protective styles that need scalp oiling
Budget pre-wash scalp massages

What we love

Very affordable at about $10
Multi-use: scalp massage oil, pre-wash treatment and split-end oil
Pleasant cooling mint sensation that many users enjoy
Formulated without parabens, sulfates, mineral oil or DEA

Worth knowing

Growth reputation rests on anecdotes, and the rosemary level is undisclosed
Heavy castor and soybean oil base can weigh down fine hair
Many essential oils and a warming agent may irritate sensitive scalps; patch testing is sensible

How it scored

The breakdown.

Five factors, weighted for formulas. Here’s our working.

7.2Good

Beauty score out of 10. Brands can’t pay for placement — ever.

Results30%6.5
Some long-term users credit it with healthier-looking length, but growth reports are anecdotal and the brand itself claims nourishment and length retention rather than regrowth.
Formula & ingredients20%6.7
A rich oil base with many essential oils, biotin and benzyl nicotinate for a warming tingle; rosemary content is undisclosed and the essential-oil load can irritate sensitive scalps.
Texture & experience15%6.6
A strong, minty scent and tingle that fans enjoy, but the castor and soybean base is heavy and can leave fine hair greasy.
Value20%9.0
About $10 for 2 oz, and only a few drops are needed per scalp application, so it is cheap to try.
Community love15%7.3
One of the most viral haircare products on social media, later shadowed by dermatologist scrutiny of growth claims and widely publicized consumer complaints about shedding.

Beauty profile

Inside the bottle.

Texture

Nutrient-rich oil blend (brand description)

Format

Hair oil

Fragrance

Contains fragrance — Fresh, invigorating rosemary-mint scent from essential oils (brand description)

Size

2 fl oz / 59 ml

Key ingredients

Ingredient encyclopedia →

What’s in it: Rosemary leaf oil, peppermint oil, tea tree, eucalyptus and other essential oils in a soybean, castor and jojoba oil base, plus biotin; no percentages disclosed.

How to use

For a scalp treatment, section hair, apply a small amount directly to the scalp, massage in and comb through to the ends; for split ends, apply to ends under a processing cap for 10 minutes, then rinse and shampoo.

Free from (brand-stated)

parabens
sulfates
paraffins
mineral oil
DEA

Claims & certifications

Paraben-free
Sulfate-free

Full ingredient list (INCI)32 ingredients · key actives highlighted · as listed by the brand

Glycine Soja (Soybean) Oil,
Ricinus Communis (Castor) Seed Oil,
Rosmarinus Officinalis (Rosemary) Leaf Oil,
Simmondsia Chinensis (Jojoba) Seed Oil,
Mentha Piperita (Peppermint) Oil,
Eucalyptus Globolus (Eucalyptus) Leaf Oil,
Menthol,
Melalueca Alternifolia (Tea Tree) Leaf Oil,
Cocos Nucifera (Coconut) Oil,
Equisetum Arvense (Horsetail) Extract,
Aloe Barbadensis Extract,
Lavandula Angustifolia (Lavender) Oil,
Triticum Vulgare (Wheat) Germ Oil,
Carthamus Tinctorius (Safflower) Seed Oil,
Oenothera Biennis (Evening Primrose) Oil,
Vitis Vinifera (Grape) Seed Oil,
Benzyl Nicotinate,
Prunus Amygdalus Dulcis (Sweet Almond) Oil,
Oryza Sativa (Rice) Bran Oil,
Tocopheryl Acetate,
Biotin,
Arctium Lappa (Burdock) Root Extract,
Glycerin,
Apium Graveolens (Celery) Seed Extract,
Cholecalciferol (Vitamin D),
Ascorbic Acid,
Ocimum,
Basilicum (Basil) Oil,
Pogostemon Cablin (Patchouli) Oil,
Salvia Officinalis (Sage) Oil,
Silica,
Urtica Dioica (Nettle) Extract

Formulas change. Always check the packaging, and patch-test if your skin is reactive.

Official product page

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Price & value

Is it worth it?

Typical price

$9.99

for 2 fl oz / 59 ml

Per ounce

$5.01

DrugstoreMid-rangePrestigeLuxury

About 62% less per ounce than the typical treatments we review. Our value score: 9.0/10 for a drugstore pick.

Price checked November 2026 at a non-Amazon retailer. Prices change — retailers show the current one.

Where to buy

Check price on Amazon Buy from the brand$9.99

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Community

What members noticed.

Ratings, skin types and the benefits people actually saw — logged on the Benefit Wheel.

No member ratings yet.

Tried it? Your score — and your skin or hair type — helps the next person decide.

Highlighted: what it’s built to do.

Discussion

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FAQ

Good questions.

Does Mielle rosemary oil make hair grow?

Mielle says it nourishes hair follicles and helps improve length retention; it does not claim to regrow hair. User reports range from visible length gains to no change, so expectations should stay modest.

How do I use Mielle Rosemary Mint Oil on my scalp?

The brand suggests sectioning hair, applying a small amount directly to the scalp, massaging it in with fingers and combing through to the ends. It can be left in and styled as usual.

Can I use it on braids or protective styles?

Yes. Mielle says it is designed for all hair types and textures, safe for chemically treated hair and suitable for protective styles, including braids and extensions.

Why does it tingle?

The formula contains peppermint oil, menthol and benzyl nicotinate, which create a cooling and warming sensation. Stop using it if the tingle turns into irritation.

Sources we checked (5)