Milk Hair Serum
Milk Hair Serum
Milk Hair Serum
Milk Hair Serum
Milk Hair Serum
Milk Hair Serum
4.8 stars, 1325 reviews
BEST SELLER

Milk Hair Serum

Best-selling leave-in conditioner

Our lightweight hydrating 3-in-1 leave-in is your daily essential for smooth, frizz-free air dries, blow dries, or day 2-3 refreshes. Protects from heat up to 450℉.

450º Heat Safe
Damp or Dry Use
Frizz-Free Air Dry
Size:
Frequency:

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The Hydrate + Hold Kit
The Hydrate + Hold Kit
$11 Savings
Free Shipping on orders $50+
Free + Easy Returns

Why we love it:

This versatile styler works on all hair types to detangle, de-frizz, and deeply moisturize, without feeling heavy. Formulated with nourishing BotaniComplex™, Red Algae and Hyaluronic Acid, it leaves hair soft, silky, and protected from heat styling.

100mL / 3.4 Fl. Oz.

Milk is the leave-in conditioning step. Santa Lucia Styling Oil is a styling oil, while Evergreen Style Cream is a styling cream for sleek shapes and flyaways.

Choose a drying technique with the step-by-step air-dry guide.

Apply 2-3 pumps throughout on towel-dried hair before brushing. Air dry or blow dry smooth. Once dry, apply 1-2 pumps to smooth frizz or for a day 2 refresh. Mix 2 pumps Milk Leave-In Conditioner Hair Serum with 1 pump of Santa Lucia Styling Oil for extra hydration.

Aqua / Water, Glycerin, Cetearyl Alcohol, Cetyl Alcohol,Cetrimonium Chloride, Panthenol, Furcellaria Lumbricalis Extract, Vaccinium Myrtillus Seed Oil, Amaranthus Caudatus Seed Extract, Hydrolyzed Chestnut Extract, Hydrolyzed Walnut Extract, Hydroxyacetophenone, Helianthus Annuus Seed Oil / Helianthus Annuus (Sunflower) Seed Oil, Caprylyl Glycol, 1,2-hexanediol, Sodium Gluconate, Hydroxypropyltrimonium Hyaluronate, Sodium Metabisulfite, Tocopheryl Acetate, Bisabolol, Diisostearyl Malate, Limonene, Vitis Vinifera Fruit Extract / Vitis Vinifera Fruit (Grape) Extract, Geraniol, Phenethyl Alcohol, Linalool, Zingiber Officinale Root Extract / Zingiber Officinale (Ginger) Root Extract, Boswellia Serrata Resin Extract, Hydroxycitronellal, Citric Acid, Rosmarinus Officinalis Leaf Extract / Rosmarinus Officinalis (Rosemary) Leaf Extract, Sodium Benzoate, Potassium Sorbate, Parfum / Fragrance

Cosmopolitian Holy Grail Beauty Awards

2025 Marie Claire Skin + Hair Awards

Who What Wear Greatest 100 Hair Products
Before image
After image
Milk Hair Serum Before After

Proven Performance

Clinically-tested, pro-grade haircare designed for visible results.

96%

experienced softer hair*

95%

said it reduced the appearance of frizz*

91%

experienced more hydrated hair*

79%

Proven to reduce breakage by up to 79%*

Defends against daily stress from brushing and styling*

*In a clinical study with expert clinician evaluation

Our signature fragrance evokes the spirit of an untamed California garden, verdant and clean, with subtle notes of woody vetiver and fresh, rejuvenating citron.

Notes of bergamot, fig & neroli blossom

Stylist Secret

Use Milk Hair Serum in combination with Santa Lucia Styling Oil on damp and dry hair. Lightweight enough to work on any hair type. Use 2 pumps of Santa Lucia for every 1 pump of Milk.

Mara Roszak

RŌZ Founder and Celebrity Stylist

The Routine

Milk Hair Serum

Milk Hair Serum

On towel-dried hair, use 2-3 pumps of Milk Hair Serum throughout your mid-lengths to ends.

Santa Lucia Styling Oil

Santa Lucia Styling Oil

Mix just 1-2 pumps of our styling oil with the milk to help smooth frizz. Twist or braid your hair loosely to create soft shapes as your hair dries.

Air Thickening Spray

Air Thickening Spray

Spray all over your hair and scrunch in, building body and letting your natural texture come through

The Difference

Leave-In Cream
Hair Oil / Serum
Heat Protectant
Yes
varies
No
varies
varies
Yes
Yes
No
No
varies
Yes
No
varies
varies
Yes
varies
No
varies
varies
varies
varies

Clean isn’t a compromise — it’s our standard.

Performance grade
For all hair textures
Clean ingredients
Cruelty-free
Sustainable packaging
Vegan

FAQ

Apply 2-3 pumps to damp towel-dried hair, focusing on mid-lengths to ends. Then air-dry or style as usual! Once your hair is dry, apply a touch more Milk to smooth and tame any extra frizz.

Yes—it offers heat protection up to 450°F, so it’s a great prep step before blow drying or styling with hot tools.

It’s a great option if you’re looking for lightweight hydration, softness, and frizz control without heaviness—especially for air-drying or low-maintenance styling.

Yes! The Milk Hair Serum works great on damp or dry hair. Apply a small amount to dry hair in between wash days to refresh your style or add a boost of hydration.

Yes—it offers heat protection up to 450°F, so it’s a great prep step before blow drying or styling with hot tools.

Yes! The Milk Hair Serum works great on damp or dry hair. Apply a small amount to dry hair in between wash days to refresh your style or add a boost of hydration.

Overall rating: 4.8461537 / 5 from 1326 reviews.

AI Generated Review Summary

This Milk Hair Serum is praised for its ability to detangle, de-frizz, and deeply moisturize hair without feeling heavy. Customers appreciate its soft, silky texture and the luxurious packaging. The product is also noted for its pleasant scent and its effectiveness in enhancing hair health and shine.

Summary topics

  • Hair Feel (17%): A significant number of customers remarked that the product makes their hair feel amazing, great, soft, and healthy.
  • Packaging (4%): Customers appreciated the beautiful and luxurious packaging of the RŌZ Milk Serum product.
  • Scent (35%): A substantial number of customers appreciated the pleasant smell of the RŌZ Milk Hydrating Leave-In Conditioner Hair Serum.
  • Frizz Control (5%): Customers appreciated the ability of this product to eliminate frizz and provide all-day hydration.

Review topics: ["color","feels","packaging","issues","hair","look","texture","scent","bottle","hydration","fragrance","shipping","results","formula","weight","serum","residue","ingredients","style","leave","amount","consistency","absorbs","frizz","oil","quality","customer service","curls","magic","touch"].

Review highlights

  • "My hair feels incredibly soft, smells amazing, and looks healthier than ever." — Leah G.
  • "This serum smells amazing, and makes my hair feel hydrated and nourished." — Laura M.
  • "My hair feels smoother and healthier overall, and the light scent is a nice bonus—subtle but pleasant." — trendyvibesrashi

Reviews

Great product. As I’ve gotten

"Great product. As I’ve gotten older , my curly hair has finer and I have a lot less hair 😞. Now in my 50’s, have been searching for products that dont weigh my hair down , that allow for a nice frizz free definition of curls. Thia product is great. Now just one step , previously used leave in conditioner plus curl cream. doesnt leave hair crunchy or wet looking. Light fragrance. Great for air drying. Havent teied to diffuse. Is a bit costly .. and have to use a bit more product. But overall a great product. Wouls love if a travel Size was available"

— J G. (5/5)

In LOVE with Roz!

"I cant get over how much I love the Roz Hair Milk! Ive been struggling with hair loss so as part of my new regime, ive stopped using conditioner and replaced it with ROZ. My hair is so soft and shiny and smells like literal heaven. Highly recommend!"

— Michele M. (5/5)

"This is the absolute best hair product I have ever owned. I use it daily on both damp and dry hair. It smooths my frizz but does not weigh it down or make it look oily. The smell is light and beautiful. Packaging is chic and elegant. It’s all around my favorite! Cannot recommend it enough!"

— Shannon (5/5)

Luxurious

"Everything about The Hair Serum is absolutely luxurious! The smell, the texture and the shine on my hair after applying the product is absolutely delicious. It's easy to use, not complicated. I have natural pepper hair and at times, my whites would become wirey making my hair difficult to work with. The Hair Serum has solved my problem. I will absolutely be repurchasing."

— Gabriela A. (5/5)

Amazing Product

"The milk hair serum is a game changer. You can use it on wet hair before blow drying, and it can be used as a finishing product for frizz and fly aways, and it doesn't make fine hair greasy. I have bought several bottles over the past few years, and each bottle lasts me almost a year. I highly recommend!"

— Michael V. (5/5)

silky hair

"This is the only product I've ever tried that leaves my otherwise textured wavy hair actually smooth and silky and feels feather light. I can run my fingers through my hair without friction or tangles. I'm 46 with some extremely course gray hair, but with this serum, it feels silky again like I remember in my 20s!"

— Kelly D. (5/5)

Great smoothing product

"I have thick wavy texture hair and the Milk Hair Serum is a great product to use on my damp hair to let it air dry. I'll use some again when it is dry to help manage frizziness."

— sara s. (5/5)

Very nice

"The product worked extremely well, leaving my very long hair smooth and sleek. But because my hair is so long( almost down to waist) I need to use quite a lot of it, and it is very expensive. I will probably not purchase it again, unless I see a good sale."

— Mary G. (5/5)

Great for ends of hair!

"Love this! It’s so smoothing and lovely and truly a unique formula that isn’t heavy and the fuzzy ends of my hair were smoothed out and softened and even curled under after using this!! It’s great!!!"

— Marissa L. (5/5)

Amazing!!!

"This is the best collection of products I have ever used for my frizzy wavy snarly hair. Even my hairdresser has asked what I am doing differently to get such soft and beautiful hair 😍"

— Yvonne M. (5/5)

Q&A

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