Davines OI All In One Milk Review 2026: Best Heat Protectant & Detangler for Soft, Shiny Hair
One product, three jobs—detangler, heat protectant, and shine-booster, all in one bottle.
Disclaimer: I do use affiliate links in this blog meaning that if you purchase anything through my affiliate links I receive commission at no additional cost to you! I only recommend products that I have heavily researched, tested and loved, and/or used for several years.
I don't like to gloat, but if you check out my Instagram, you can see exactly why people obsess over my long, Rapunzel-worthy hair—and this milk is a big part of how I keep it that way. I have been using this Davines OI Milk for over 8 years now, and it is the epitome of an absolute holy grail. This product is a rare true all-in-one, but most notably an amazing heat protectant and detangler right after getting out of the shower. Formulated with Roucou oil, a naturally antioxidant-rich oil extracted from annatto seeds, it's built to hydrate, smooth, and protect in a single step, rather than making you layer three separate products just to get your hair ready for styling.
Not only does it make your hair exponentially more manageable when brushing, but it leaves it smoother, softer, and with an incredible shine after blow-drying. Wet hair is at its most fragile and prone to breakage, so having a product that detangles that easily right out of the shower makes a genuinely noticeable difference over time—not just in how your hair looks that day, but in its overall health long-term.
If you need more convincing, both of my LA celebrity hairstylists approve of it. When the people whose entire job is making hair look flawless keep reaching for the same product, that's about as strong an endorsement as you can get!
It's not just my hairstylists who swear by this one. Hailey Bieber has publicly credited it as one of her go-to hair products, telling Vogue that with all the time she spends swimming in the summer, she relies on it to keep her hair protected and knot-free. It's also become a genuine TikTok favorite, with countless hairstylists and beauty creators calling it a "gatekept" holy grail they almost don't want to share. When a product earns that kind of consensus across celebrities, professionals, and everyday users alike, it's a pretty strong sign it's not just hype.
Thanks to my Virgo detective work, I usually find products like this long before they blow up—this one just happened to catch up with the rest of the internet eventually!
Beyond the formula itself, I love that this purchase feels good in a bigger-picture way too. Davines has been a certified B Corp since 2016 and became a carbon-neutral company back in 2018, with a commitment to reach net-zero emissions by 2030. They're also a Plastic Bank partner, working to remove plastic waste from oceans and coastal communities, and they use carbon-neutral, low-impact packaging across their lineup. It's rare to find a brand that performs this well and backs it up with genuine environmental commitments—but Davines has been doing both since long before "sustainable beauty" became a marketing buzzword.
P.S. I also love Davines' hair masks (specifically the ‘Let It Go’ mask). If the OI Milk becomes your everyday holy grail, their mask lineup is worth adding in for a deeper treatment moment once a week.
Shop the Davines OI Milk from various retailers below:
