Best suited to people with medium-to-thick, coarse, or frizz-prone hair who want extra shine and humidity resistance without a silicone-heavy or heavy-feeling oil. KMS also markets it as usable on beard and body hair. It's a consumer retail styling product, not a professional-only formula, though it's sold through salons.

Less suited to fine or thin hair, where an oil this rich can weigh strands down rather than add lift.

Where many smoothing oils lean on silicone for slip and shine, this one is built around an upcycled olive base plus grape seed and avocado oil, so the smoothing effect comes from a plant-oil film on coarse, frizz-prone hair rather than a silicone coating.

• Apply a small amount to towel-dried hair before blow-drying or styling to help control frizz.
• Add a few extra drops to dry hair and smooth over the ends to seal the cuticle and add shine, repeating as needed for extra nourishment.
• Can also be applied sparingly to beard or body hair.

Pros:

• Silicone-free shine and frizz control, relying on plant oils rather than dimethicone film
• Free of sulfates, mineral oil, parabens, and added dye
• Brand states up to 72 hours of humidity/frizz protection from a single application
• Doubles as a beard or body oil

Cons:

• Rich enough that it can weigh down fine or thin hair
• Contains fragrance and fragrance-allergen ingredients (limonene, linalyl acetate) that may bother sensitive scalps
• Marketed benefit figures (e.g. up to 100% more shine, 76% less frizz) are brand-reported, not independently verified