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These overnight serums deliver seriously magical results by morning... BRB buying 20.

I am a contributor who has been writing for BuzzFeed Shopping since 2020, focusing on beauty, fashion, home decor, and pets (especially cats!), and whose work has been featured in publications like Marie Claire, Coveteur, Byrdie, The Zoe Report, Bustle, & more.

Read more about how biotin shampoo could help with the fullness of hair at Cleveland Clinic. 

Promising review: "I dye my hair a lot and for that reason my hair does not grow much in a year, seven months ago I dyed my hair and I left the dye for to long so I got a bald spot, I started looking for some kind of treatment for hair growth and I landed this shampoo. My bald spot is not only gone but the hair in it is very long and the growth of my hair increased drastically, now I buy one bottle after the other. I cannot say it does much for how my hair look but I just add a very good conditioner and my hair looks beautiful! 100% recommended!!" —Alejandra

Promising review: "I have very thin and fine hair, which is prone to frizz and is extremely dry. This product has been a lifesaver for me. I use this, let it air-dry after rinsing, and my hair feels lighter and healthier. It’s helped with the frizz and dryness. It’s amazing and works like magic." —Martnah

Promising review: "I have naturally brown hair that I color to cover grays.. slowly but surely my hair was getting more and more brassy and orangey. My hair is porous and I think my hairdresser was afraid anything brown would turn it black. Then I took matters in my own hands a tried MR in CAFFE. Perfectly did what it said and now I have a gorgeous neutral brown hair no brass!" —Kristen

Get it from Ulta for $24 (available in six shades and one clear option).

Promising review: "This stuff really works! I'm a triple process blonde and the Virtue Healing Oil has made a huge difference in the texture and condition of my hair. It doesn't work overnight so be patient, but it works! I'll never be without it again!" —jmioshi

Get it from Sephora for $26+ (available in two sizes).

Promising review: "My favorite leave-in conditioner to moisturize my hair! It works so well and leaves my hair shiny and soft. I have long hair and use ~five sprays throughout, then brush it through. It has a nice, subtle smell, and the bottle lasts until the product is gone. This is also a pretty clean product and made in Italy — so love these aspects as well." —Grace E

Get it from Amazon for $22+ (available in two sizes).

Promising review: "Favorite Keratase product. I use it nightly and it leaves my curly hair soft and frizz free. I have dyed my hair for years, and always suffered from split ends but this product has helped my hair so much!" —Melanie

Get it from Amazon for $32+ (available in two sizes).

Promising reviews: "This product ‘fixed’ my frizzy, sun, chlorine damaged hair in a week. Scent is fresh, not overpowering. Didn’t make a mess on my pillows. Will continue to purchase." —chelleeeee

Promising reviews: "My hair is kinky 4c hair. Tends to be dry. I bought this in hopes that it would help my hair as far as moisture and softness. And it has not disappointed. My hair when I style it is so smooth and wavy and shiny and slick. I will use this every time I wash my hair for the rest of my life." —Kay Shufford 

"Better than what I expected. My hair is less frizzy, and the curls are more pronounced. My hair looks healthy and I love the fact that this is a clean product and I am supporting a woman-owned business." —Marta Shepherd

Get it from RosaleeAndCo on Etsy for $14+ (available in two sizes and two refill sizes).

Promising reviews: "I have fine baby hair, and this does not weigh it down. It makes my hair soft without the grease, and the smell lingers for days. I look forward to washing my hair so I can use this. I'll never change; this is a permanent staple now." —Heathmarie

"Worth it! Tried this for the first time this week, and am loving it so far. I have very thick, long, wavy/curly hair, and applied this to my towel-dried wet hair and let it air dry. Enhanced curl and shine. And every time I catch a whiff of my hair, I smile. I love this scent so very much." —Einahpets

Get it from GHD for $429 (available in three colors).

Promising reviews: "I have wavy hair, and whenever I air dry it or sleep with my hair wet, I wake up with SUPER frizzy hair. Used this and the next morning my waves were not frizzy at all, and looked perfect!" —myajmm

"Love this stuff — especially the fact that it only has to be in your hair for one minute. Great for when you want to do a hair mask or treatment but don't have 10 to 15 minutes to wait. And of course it smells great!" —alirose2468

Promising review: "I saw this product mentioned in so many articles about cheap products that are great. I don't know what took me so long to purchase this, but I am kicking myself for waiting!! My hair is DAMAGED. Beyond fried. I've bleached it so many times. I am consistently changing my hair color, and while the semi-permanent dyes don't hurt it, the bleach sure does! My hair always feels like straw. My hair looks and feels INCREDIBLE!!! It is so soft, and I am just absolutely in love! This will forever be used by me from now on!" —Krystle

Promising review: "I bought this hair bonnet after forgetting to pack one for my trip. I absolutely love it!!! Initially, the band seemed a little tight, but by the second or third night, it fit like a glove. This bonnet is a great replacement for a hair tie for edges and a bonnet." —Clarice

Get it from Walmart for $4.97 (available in three colors).

Promising review: "I’ve struggled with dandruff for years, and this shampoo has truly made a difference. After just a few washes, my scalp felt cleaner, less itchy, and noticeably flake-free. What I love most is that it doesn’t feel harsh or drying like other dandruff shampoos I’ve tried. It lathers nicely, smells refreshing, and leaves my hair soft and manageable. I’ve even noticed less buildup on my scalp over time. If you’re dealing with stubborn dandruff, this is 100% worth trying — it brought me real relief!" —Natalie Fineman

Promising review: "I've used three bottles of the edge drops and the results are jaw dropping, not only has my hair grown, it has become much fuller. I really recommend this product, especially to us mothers battling hair loss.." —Hailey

Promising review: "I've been dyeing my red hair for a few months now with 30 vol. developer, and it dried my hair so bad. I've never had it very dry until I went red. I've always had black hair. When I brush my hair, I can see the ends just fall off, and it takes way longer for my hair to naturally dry than it used to. I used this product and WOW! I'm in love. It does exactly what it claims to do. My hair is soft, shiny, smells good, and I can see and feel the difference on the ends. I don't put too much only because I don't want to risk my hair looking too oily, but I have found a little goes a long way." —Maria369

Get it from Amazon for $13.29+ (available in two sizes and five other formulas).

Promising reviews: "I’ll admit I was extremely skeptical because every single 'viral product' I’ve tried so far I’ve been disappointed in...not this one! I used it for the first time this morning and could instantly tell a big difference with the first patch of hair I dried. I will definitely NEVER run out of this product again, and I plan to get the shampoo as well. I highly recommend this product for anyone that has dry or damaged, fine hair." —Stefanie

Get it from Amazon for $29+ (available in two sizes).

Promising review: "I do believe this really works. I have new hair growth making my hair appear much thicker. I just bought my 4th bottle and will continue to purchase this product." —Robbin

Get it from Ulta for $39.20 (originally $49).

Promising review: "Tame those flyaway hairs!  I have a lot of breakage since my hair is back alot...but those lil hairs in the front poking up were driving me nuts.  The Styling Stick keeps the hairs down and i'm looking polished." —415missy

Promising reviews: "my hair has been feeling so light and soft since I started using this. I use to shampoo, distribute conditioner, then I use to rinse/brush the conditioner out." —aubs

Promising review: "Love these because they actually dry my hair pretty fast and are very soft on my hair. They stay in place, and I can go about my business without having to worry about my towel falling. Very comfy too." —M. Antillon

Get it from Amazon for $6.16+ (available in two colors).

Promising review: "I'm 40 years old with wavy/curly hair. I've air-dried my hair for most of my life and just accepted I would have frizz. Even with using anti-frizz products. Not with JVN's Air-Dry Cream. No frizz!! My hair was silky smooth all day long. Not greasy or heavy from the cream. I will definitely buy again! And would highly recommend. Great value for money." —Kelly D.

Get it from Amazon for $15+ (available in three sizes).

Promising review: "As good as I hoped. My curls haven’t been the same since kids and blowing out straight for years.  Any curls I could get were poofy an hour after drying. This smells amazing, is very light." —coop622

Promising review: "What a godsend this product is! I read about this in a BuzzFeed article and promptly placed an order after dealing with an itchy scalp for weeks with no relief, despite washing my hair with moisturizing shampoo and conditioner frequently and using other scalp-care products. It was so bad that I was even using hydrocortisone twice a day. 

Once this product came in, I sprayed it on my scalp and massaged it in, and immediately felt relief. It’s so lightweight, and it smells so good — like really therapeutic. I only needed to use it once a day for a few days. And now my itching is completely gone. 

My husband has thin hair and an itchy scalp, and he absolutely loves this product, too. It is healing a bunch of rough patches, but it’s still too early to see if it will help with hair growth for him. Even if it doesn’t do that, we still love this product. I also use this as a dry shampoo for after workouts and dance class. This product is absolutely amazing and worth all the hype!" —dragonmermaid

*BTW, fine doesn't mean straight! You can totally have fine strands that form into waves or curls of all types. Speaking as someone with fine 2b curls, brushing knots out of your hair while you're still in the shower is the name of the game when it comes to keeping your hair tangle- and damage-free! Using this will help your conditioner coat your strands more fully while minimizing breakage that might happen during an out-of-the-shower boar bristle brushing session.

Promising review: "I really love this version of the Tangle Teezer because it’s meant for fine and fragile hair. I have very fine, type 4a hair and I love how gentle this is when brushing through my hair. It doesn’t snag or pull. After lightly finger detangling, I follow up with this brush. I highly recommend this brush for super fine hair, even if you have type 4 hair!" —Fit Babe

Get it from Target for $18.69 (also available in pink).

Promising review: "Since I started using this treatment without rinsing, I have noticed an incredible change. The texture is light, doesn't leave hair greasy or heavy, and absorbs super fast. With only a small amount is enough to cover the tips and middles. After applying it, my hair is much softer, more manageable, and has a healthy shine. In addition, it helps a lot to control frizz, especially on wet days." —Maria

Promising review: "This is the holy grail of hair products. I am in my late 40s and have thin, dry, color damaged hair. My hair has been frizzy and I could only wear a ponytail and even in that it would become a tangled rat mess. I have tried 100s of dollars in products from Keratin hair treatments, Aveda products, Nexus, Pantene, Its a 10, blowouts EVERYTHING under the sun and nothing was working. I was ready to shave my head and start over. Then I found this and read soooo many reviews and said shoot all I have to lose is more money. So for my fine, thin, color/highlighted damaged hair I got the 4/5 shampoo and conditioner, weightless nourishing mask,#3 Bond building hair and the #9 Bond Protector. My hair is now SOOOFFFTTT, not frizzy even when it is humid out (I live in the desert) so not many humid days until recently. This is all in just three days!!!" —Flippo

Get it from Amazon for $16+ (available in four sizes).

Promising reviews: "I used this conditioner for the first time today and I love it. It smells lovely and left my hair feeling really soft. I just got my hair highlighted to be more blonde and was hesitant about trying a new product in case it didn't make my hair feel healthier but it did. The design is also considerate because if it's too low to pump, removing the lid provides basically the jar for easy removal and the opportunity to use ALL the product. My hair is bleached, naturally curly, and has been really dry lately. This conditioner really helped!" —LS

Get it from Ulta for $14+ (available in two sizes).

Promising review: "I'm on my third bottle of the One Hit Wonder Spray from Mane Club. This is by far the best leave-in conditioner I have ever used. It works so well for my very curly, very thick, and very damaged hair. It adds so much moisture to my hair and really keeps it hydrated. It prevents my hair from getting frizzy and helps keep my curls defined. My hair feels so soft and shiny after using this product. It's also so much easier to brush through my hair because I have no tangles when I use this. It smells divine and makes my hair smell divine. I would definitely recommend this product to anyone looking for an effective multi-benefit leave-in conditioner spray." —Dylan & Tiffany Bennett

Promising review: "This is the best hair oil I’ve used so far!! My hair was a bit frizzy and just not lying right one night, and I applied this hair oil, and it completely changed the look and feel of my hair! So so much better than before!" —meredith08

Get it from Sephora for $25+ (available in two sizes).

Promising review: "I absolutely LOVE this product. Having recently moved to a more humid climate I was desperate to find a product that worked when it was humid outside. Nothing worse than taking the time to do your hair, go outside and have your hair look like a dandelion! My hair is bleached and dyed platinum so any product I use has to protect and work. After using it only once, my hair looked fantastic. The humidity had no effect whatsoever on hair. This is a game changer. I will purchase this forever. 10 out of 10!" —Valerie

Get it from Amazon for $14+ (available in two sizes).

* The Secret To Glossy Hair Is These 26 Korean Haircare Products

* If You Have No Idea What You’re Doing With Your Hair, Here Are 27 Things From Ulta To Help

* Hero Hair Products That’ll Help You Battle Frizz, Greasiness, Dryness, And More

BuzzFeed Shopping is service journalism first: our writers and editors spend all day shopping so you don’t have to, vetting products, fact-checking brand claims, and surfacing what actually helps in real life. We center readers over revenue, recommend products with authenticity (using real experiences, not ad-speak), and reflect our diverse audience, inclusive of a variety of price points, people, and needs. We cut through fake deals, favor useful info over glossy fluff, and recommend both budget and splurge options with context so you can decide what’s right for you — and still have a little fun along the way.

Reviews for this post have been edited for length and/or clarity.