Beauty Best Best Hair Oil Head to Head: Two Top Picks Compared
Mielle Rosemary Mint Oil and OGX Argan Oil of Morocco are the two most bought hair oils. One targets the scalp with rosemary, the other seals the hair shaft with argan. Here is how they compare across the factors that matter.
| Factor | Mielle Organics Rosemary Mint Scalp and | OGX Renewing + Argan Oil of Morocco Pene |
|---|---|---|
| Main purpose | Scalp and growth support | Frizz control and shine |
| Key ingredient | Rosemary and mint | Argan oil |
| Best hair type | All, esp. thinning | Dry, frizzy hair |
| Texture | Lightweight oil | Lightweight oil |
| Price | Budget friendly | Budget friendly |
| Bottle size | 2 oz | 3.3 fl oz |
Our Verdict
These two oils serve different jobs, so the winner depends on your goal. Pick Mielle Rosemary Mint if you want scalp care and growth support. Pick OGX Argan Oil if you want frizz control and shine on your lengths. Many buyers keep both and use them together. If you must choose one, match it to your biggest hair concern.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: Heat stylers and color-treated hair wanting repair plus shine.
Olaplex No. 7 Bonding Oil, 1 fl oz
- Highly concentrated weightless styling oil
- Heat protection up to 450F
- Up to 72-hour frizz control
- Boosts shine, softness and color vibrancy
Pros
- A few drops transform dull hair
- Repairs while it styles, not just coating
- Color looks richer and lasts longer
Cons
- Premium price for 1 fl oz
- Easy to over-apply on fine hair
- Dispenser needs upside-down tapping
Best for: Coarse, thick or very dry hair needing extra moisture.
OGX Renewing + Argan Oil of Morocco Extra Strength Penetrating Serum, 3.3 fl oz
- Extra-hydrating argan oil plus silk proteins
- For dry, damaged, coarse and curly hair
- Paraben and sulfated-surfactant free
- Multi-layered citrus, floral and woody scent
Pros
- Stronger moisture hit than the original
- Improves elasticity in coarse hair
- Still affordable at drugstore prices
Cons
- Heavier than the original formula
- Can weigh down fine hair
- Not ideal as a pre-shampoo treatment
Best for: Loyal OGX users who go through oil quickly.
OGX Renewing + Argan Oil of Morocco Penetrating Oil, Pack of 2
- Two 3.3 fl oz bottles of the classic formula
- Cold-pressed argan oil, paraben-free
- Daily-use frizz control and shine
- Pairs with OGX shampoo and conditioner
Pros
- Lower cost per ounce than a single bottle
- Stock up without reordering
- Same trusted formula reviewers love
Cons
- Two bottles is a lot if you dislike the scent
- Takes a while to use up before expiry
- Bulk buy ties up more cash upfront
Want the Full Picture?
Penetrating Versus Sealing: What Each Oil in This Comparison Actually Does
The two oils headlined in this comparison work through completely different mechanisms, and buyers who understand the difference choose better. Argan oil, the core of the OGX Renewing + Argan Oil of Morocco formulas, is a penetrating oil rich in oleic and linoleic acids. It enters the hair shaft, softens from within, and suits dry, porous, or coarse hair that needs real internal moisture. Mielle Rosemary Mint Oil, the other half of this matchup, is primarily a scalp treatment. The rosemary targets the scalp environment while the mint gives that tingling sensation, and it is not designed to be a lengths finisher.
This distinction matters for expectations. If your ends are dry and brittle, the OGX argan oil addresses that directly. If your concern is scalp health and shedding, the rosemary mint oil is the relevant pick. Using a scalp oil on dry ends leaves them greasy without softness; using a penetrating oil as a scalp treatment wastes product. The Olaplex No. 7 Bonding Oil sits in a third category, a silicone-based bonding treatment that seals and smooths without the weight of a plant oil. For the full head-to-head reasoning, our pre-poo guide explains how oils behave differently before versus after washing.
Commercial Blends Versus Pure Single Oils: Reading the Label Honestly
Drugstore oil blends like the OGX argan formulas are not pure argan oil, and that is not necessarily a flaw. Commercial blends typically lead with silicones such as dimethicone or cyclopentasiloxane, with the named plant oil further down the ingredient list, plus fragrance. The silicones provide the slip, shine, and frizz control that most buyers actually want, while the plant oil contributes a smaller share of the effect. Pure single oils, by contrast, are one ingredient, heavier, and slower to absorb, but free of silicones and synthetic fragrance for buyers who want that.
Cost per milliliter tells the real story. A 3.3 oz blend bottle at a drugstore price often costs less per use than a 1 oz pure oil at a premium price, because you need less of the silicone blend to get visible smoothness. When a blend wins: you want fast cosmetic shine, frizz control in humidity, or heat styling protection. When pure wins: you have a sensitive scalp, you are doing pre-wash treatments, or you avoid silicones deliberately. Check the first five ingredients before buying, because anything past position five is present in small amounts regardless of how loudly the label advertises it.
Dosing by Length and Fixing Over-Application
The most common hair oil mistake is using too much. As a starting point: short hair needs 2 to 3 drops, medium hair 3 to 5 drops, long hair 5 to 8 drops, and very thick or long hair up to 10. Warm the oil between your palms first, apply to damp hair from mid-length down, and keep it off the roots unless it is a scalp treatment. Fine hair should halve these amounts and stick to the ends only, or the weighed-down next-day look is guaranteed.
If you over-apply, do not rewash immediately. Blot the lengths with a dry microfiber towel or tissue to lift the excess, then dust a tiny amount of dry shampoo through the oiliest sections. For a complete walkthrough of oil-first routines, see our pre-poo top models comparison, which covers how treatment oils differ from finishing oils in weight and wash-out behavior.