Physicians Formula | Eye Booster 2-in-1 Lash Boosting Eyeliner & Serum - Product front facing with cap off on a white background
Physicians Formula | Eye Booster 2-in-1 Lash Boosting Eyeliner & Serum - Product front facing with cap off on a white background

Ultra-Fine Liquid Eyeliner

Ultra-Fine Liquid Eyeliner is rated 4.5 out of 5 by 984.
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In stock


    • High-tech formula enhances the appearance of lashes while nourishing & conditioning lashes.
    • Lash Boosting complex targets the base of lashes where it is most effective.
    • Innovative and easy to use tool delivers the perfect amount directly to the lash base.
    • High-tech Japanese formula can be used alone day and night or under eyeliner.
Hypoallergenic. Fragrance free. Paraben free. Dermatologist approved. Safe for sensitive eyes and contact lens wearers.

Water. Glycerin. Myristoyl Pentapeptide-17. 1,2-Hexanediol. Boric Acid. Caprylyl Glycol. Sodium Borate. Sodium Chloride. Tropolone. Disodium EDTA.


Apply at the base of lashes. Wear under eyeliner or alone. Never apply inside the lash line. Keep cap tightly closed to prevent formula from drying out.

Rated 5 out of 5 by from My favorite eyeliner ever. Love that it's not felt tip, that can end up being crumbly or erase itself, and that I can hold it like a pencil. The brush tip applicator makes for a precise clean look for wings which i use a lot because I'm an asian with monolids. You do need a steady hand because it can be easy to mess up with how precise it is. Would recommend to those who have practiced with wings a lot. It would also be really good for just a simple lining. Really love the formula, doesn't dry up like felt tips, and applicator.
Date published: 2019-03-18
Rated 4 out of 5 by from I love this eyeliner so much. It’s a great brow pen as well! I use the brown shade to add hair like strokes to my brows. And when I do my eye makeup I use this for my twiggy lashes that I draw on practically every day. The liner, like most brush tips is precise, and while the liner is not always opaque on the first pass, a little shaking can solve that easily. It actually does grow my lashes which is hilarious because I thought it was a gimmick. It is pretty long lasting and I would love to try the waterproof version of this
Date published: 2020-05-01
Rated 5 out of 5 by from My favorite liquid liner! My favorite liquid liner! I have been using this for nearly 8 years and have been through countless tubes. I have hooded eyes and small real estate on my eyelids, so it is very important to me to have a very precise and fine line. This liner has a tiny brush tip that lets me lay color as close to the lash line as possible. Even with unsteady hands I feel that the brush tip isn’t so long that it bends and flexes too much - I have enough control. I don’t think it actually does anything for my lashes, but I am ok with that.
Date published: 2021-10-10
Rated 5 out of 5 by from This eyeliner is my This eyeliner is my new favorite drugstore eyeliner. Although I have not tried wearing this in the hot humid GA Summer weather, I have worn this for all day and evening work events. Thankfully it has not feathered,flaked, and bled down my face. I love easily it glides across my lash line, and that it has a fine tip, which allows me to draw light or heavy lines. I also like how it does not clump up my lashes if and when some get onto my lashes when I apply the liner. I have not noticed any length or growth to my lashes from the serum, but I have noticed that when the gets into my eyes from me applying too close to the lashline, it does not irritate my sensitive eyes. To remove, I do suggest using a waterproof eyemakeup remover and then use your normal face cleanser.
Date published: 2021-12-14
Rated 4 out of 5 by from Honestly, my go-to eyeliner and the one I keep reaching for. Why isn't it five stars then? Well, for one, it's not a perfect eyeliner. It's not all that dark. It's not smudge-proof and it somewhat disappears throughout the day, especially ar the wing area. However, when it does come off, it doesn't give you raccoon eyes like a lot of other eyeliners, which is why it's my go-to. If it's going to come off, I rather it make a quiet exit than a dramatic one.I'm also not sure if the lash boosting bit actually works.
Date published: 2019-04-08
Rated 5 out of 5 by from This is the only liner I use. I’m very picky with eyeliner as I get the worst raccoon eyes, and this doesn’t smear or smudge. It lasts all day and I can get a nice straight line with this liner. It’s especially great for doing a wing! I get so many compliments on my winged liner and I tell everyone that they have to use this eyeliner! I initially bought it since my eyelashes are super short (and I have noticed results with them) but I stayed because this liner is so easy to hold and use and it looks fantastic!
Date published: 2019-01-21
Rated 5 out of 5 by from Go go-to liquid eyeliner Go go-to liquid eyeliner for 4 years. I have yet to find another product that applies as easily as this one! I love that its a brush tip and I find it so much easier to get a sharp point with it than I would with a felt tip. The only con would be that its definitely not water proof at all, but Ive never gone for waterproof makeup so that is not a issue for me personally. Ive found that if I am wearing this for a long period of time it does usually need a quick touch up, but its easy to carry along in a purse or bag for such a thing. Because it doesnt have an incredibly strong staying power it comes off with makeup remover way easier than any other liner Ive tried which is one of the reasons why I love it. Ive gone through so many of these eyeliners and I will continue to buy!
Date published: 2020-12-13
Rated 5 out of 5 by from This is my favorite liquid eyeliner of all time. I have been using this product since high school and like it more than any other product. It is affordable, has beautiful staying power and it comes in dark brown and black. The black is super black and the brown is almost black. I prefer the dark brown as it looks more natural. It last really well, but is not completely waterproof. It is so easy to work with and creates a precise and thin to thick line. It is so versatile. Hope this never gets discontinued.
Date published: 2020-04-07
Rated 5 out of 5 by from Benefits: High-tech formula enhances the appearance of lashes while nourishing & conditioning lashes. Lash Boosting complex targets the base of lashes where it is most effective. Innovative and easy to use tool delivers the perfect amount directly to the lash base. High-tech Japanese formula can be used alone day and night or under eyeliner. Hypoallergenic. Fragrance free. Paraben free. Dermatologist approved. Safe for sensitive eyes and contact lens wearers. I love this product. The brush tip is the perfect length to control the application but also allows a soft sweeping motion. The product comes from the brush and is always moist, but never goopy so you always have a sharp edge. And I honestly think it has helped increase the length of my lashes since I started using it.
Date published: 2019-03-09
Rated 4 out of 5 by from One of the best liquid eyeliners from the drugstore! It’s really easy to use and it lasts pretty much all day. I also did notice it actually made a difference in my lashes too! You do get a good amount of product, so if you use this everyday you won’t run out super quickly! However, this product is somewhat expensive for being drugstore. It’s around $12, so you could buy a high end product for like $8 more. If the brand or high end products doesn’t matter to you, this would be a great eyeliner option!
Date published: 2018-05-30
Rated 5 out of 5 by from This is my absolute favorite liquid liner! Ive used several of these and keep coming back. The only thing Id change is to make it more waterproof, but there is a waterproof option, I just havent tried it so I cant fault them for that! The brush tip of this pen is so easy to use and always dispenses the perfect amount of liner. Its not too runny and messy like others. Its black and doesnt seem to have any trouble drawing over my eyeshadow. Definitely recommend this for an easy to use liquid liner pen!
Date published: 2020-12-02
Rated 3 out of 5 by from So I think the eye of a liquid liner and an eyelash serum in one is a really cool idea. That being said I think the fact that there is a serum in it really waters it down. Its black, but very sheer. It easily rubs off, like very easy. Its a brush applicator which I dont normally like, but I did like this one. I actually teach on over Zoom right now so this is something easy I can throw on quickly without being super made up. But I mean its not the greatest or something I would really recommend
Date published: 2020-08-08
Rated 5 out of 5 by from Been my Go-To Eyeliner for Years! This is my absolute favourite liquid eyeliner. I have oily/hooded eyelids so a lot of eyeliners end up spreading and smearing (like the KVD tattoo liner and Tarte S*x Kitten liner) but this eyeliner stays put all day long and is super easy to remove at the end of the night with micellar water or even just regular face wash so I don't feel like I'm tugging on my eyes. I used to buy the Stila Stay all Day eyeliner and this has replaced it. The price is much more affordable and I find the brush tip is more flexible and easier to control. The sprung cap keeps the brush bristles well protected and I had one eyeliner for over 2 years without it drying out (although I ended up disposing of it because it reached the end of its shelf-life). TL;DR this product is my HOLY-GRAIL eyeliner for sure!
Date published: 2021-03-09
Rated 5 out of 5 by from Love, love, love this eyeliner for everyday use. It goes on smoothly and I can paint a fine line, which I prefer. I can also do a thicker line but it takes a little more work with the brown eyeliner. The brown isn't dark or heavy and looks very natural. The brush is soft and non-irritating. The eyeliner isn't waterproof but I find it lasts all day and it's easy to wash off at night. I do not see any "lash boosting" after a couple years of use, but I don't care since the eyeliner is perfect.
Date published: 2020-12-01
Rated 3 out of 5 by from For the first month or so of using the serum and eyeliner combo, it was great - great formula, the brown color was pigmented and easy to control. After, the pen dried up and when I apply it to my eye, it would start pigmented and then get light or nothing comes out. I shake it and everything but it just got drier and drier and I gave up. Make up that takes up too much of my time is just not worth it. Also, there was no noticeable difference to my lashes after using it for a month or so.
Date published: 2020-11-08
Rated 1 out of 5 by from New formula isn’t working This was my go to eyeliner for five years. It worked it went on easily and was beautiful. Now it’s difficult to put on and barely comes out of the tube. Bring back the old formula.
Date published: 2019-09-09
Rated 5 out of 5 by from This was recommended by my favorite YouTuber. I would of never thought to try it. I'm glad I did! Gives a precise line and easy wing with a paintbrush type tip that's flexible. I even put it in my water line and it doesn't run! Stays put all day and the pen doesn't dry up quick. I can use it for 3-4 months before it runs out. I store it with the point down and I believe this helps. I have long lashes so I'm not sure if it helps them grow, but it doesn't hurt to give them a boost!
Date published: 2020-04-26
Rated 2 out of 5 by from This is such a cheap, awful, disappointing eyeliner from the drugstore. I don’t know what is is about there liquid liners but my goodness it’s just plain trash. The pigmentation is not a great one as it serious lacks making it look like a charcoal gray. Because I am getting use to doing wing liners, the point was very decent. I just wish this was super pigmented where it easily glides, without looking super patchy and dull. Do not buy this at the drugstore, not worth the price.
Date published: 2019-01-20
Rated 3 out of 5 by from I honestly never really liked the physician formula eyeliner that much although I have to use it because I suffer from eye allergies but it’s not my favorite product even do it gets the job done sorry but physicians eyeliners are not as pigmented as I wish they were I said it and they run out really fast and they are kind of greasy too I don’t know how to seat their formula but I gave it 3 stars because hey the job of painting gets done just not as deep black as I would like
Date published: 2020-05-17
Rated 5 out of 5 by from I don’t wear eyeliner except when I’m doing a full face of makeup and this is hands down my favorite drugstore liquid eyeliner. It’s so easy to use and beginner friendly and I love how black the eyeliner draws on. Not to mention that one it dries, IT DOES NOT BUDGE. And one lasts me for a long time without drying out, which is a problem I would have with a lot of other liquid eyeliners. It made me want to try other products from this brand because of the positive experience!
Date published: 2019-08-09
Rated 5 out of 5 by from This is my holy grail eyeliner. Ive literally used this liner for at least 10 years roughly. It is tried and true to what it says it does. Its highly pigmented, super long lasting (especially with a primer first), and really makes your eye lashes grow long and full! I use the waterproof version. The brush tip is like a watercolor paintbrush. It flows and bends well to reduce error. Anyone can learn to do a cat eye with this liner. Dont ever discontinue this product please!!
Date published: 2020-09-17
Rated 3 out of 5 by from I absolutely love the aplicator; it is so easy to do a straight line and perfect wingedliner. I like the formula, it goes on smooth. However, to get color pay off you'd need to get the ULTRA BLACK. The black one looks grey And patchy, so much so that I had to go over and over again the same spots to get a grey line that is not patchy. I also don't find this to be very matte; some days it looks more matte than other days, I guess it depends on other products I have on.
Date published: 2018-07-18
Rated 5 out of 5 by from This is an AMAZING eyeliner. It's very beginner friendly, since I'm not great at eyeliner, but it was easy to work with and didn't get as smudgey or messy. It went on very black and dark which was exactly what I wanted. It lasted all day and didn't budge until I removed it, but was still easy enough to remove. It didn't dry out for much longer than usual, so I impressed by that as well. It's also a perfect price point since it's drugstore so it's an all around win.
Date published: 2020-04-22
Rated 5 out of 5 by from I've been searching for a good brush/ pen type liquid eyeliner in brown for a while. I have tried Stila's, which tugged terribly and was a very red-based shade of brown. This one by Physicians Formula has become my new HG. It's comparably less expensive, doesn't tug, draws a skinnier line than Stila's and most others I've tried, and is a nice neutral brown. It is pigmented and lasts all day too. I recommend this eyeliner to anyone looking for a good brown eyeliner.
Date published: 2018-06-14
Rated 5 out of 5 by from This eyeliner is held very close to my heart as it’s cruelty free AND has a conditioning formula for the lashes. It’s nearly fool proof and great for beginners! I’ve gotten both waterproof and regular and I will say they both last pretty much the same. I prefer regular over the water proof tbh. The tip is great for perfecting the sharp lines everyone is trying to achieve! I’ve been using this eyeliner for over 5 years now and don’t plan on changing products 10/10
Date published: 2020-05-01
Rated 3 out of 5 by from I am always skeptical of every 2-in-1 product, and tend to review harsher because I believe that if youre going to make a 2-in-1 product both components should be close to perfect. This liner did not last on my eyes at all. It came off very easily, as expected to be mixed with a serum. The pigmentation was nice and it looked good while in place, even if it didnt last long. I am also middle ground on if the serum did anything for my lashes. Not a product for me.
Date published: 2020-10-17
Rated 5 out of 5 by from it was a little dry when I first got it, but I think it might have been sitting on the shelf for a long time. it is super easy to clean up if you make mistakes, as it does not dry down super fast and stays wet long enough to let you work with it. sometimes its a little thin and can take more than one layer, but it layers very well! the tip is flexible and amazing, and im VERY much a beginner at eyeliner. this one made me believe I could finally do it. buy this!
Date published: 2020-05-11
Rated 4 out of 5 by from This is so easy to apply! The brush tip is ultra fine, really can get great precision. It has great pigment, the wear time lasts and it didn’t feather throughout the day. It includes a lash conditioning formula. Not sure if I will see results in the long term, however, I feel that is a bonus feature to the already great product! [product:physician-s-formula-inc-eye-booster-ultra-fine-liquid-eyeliner-with-lash-conditioning-serum-ultra-black-0-016-fl-oz-0-5-ml]
Date published: 2019-07-04
Rated 4 out of 5 by from I’ve been using this eyeliner every day for several years. I’ve used many others in the past and stuck with this one because I want a 2 in 1 product that supposedly has lash serum. I feel like I need lash serum but don’t want to spend the time or money on a separate product, so I’m hoping this liner is actually helping my lashes stay at their optimal. In all honesty, I can’t tell if the serum is making a difference in the health or length of my lashes or not.
Date published: 2019-06-05
Rated 4 out of 5 by from The only reason this doesn’t get five stars is because it washes away very easily. An extra watery yawn will have you out a wing unless you set it with a matte black eyeshadow. The brush tip alone is worth five stars. It’s become my new gold standard for how I want the tip of a liquid eyeliner to be. It does dry out fairly quickly if you use it a lot but It’s $12 at Walmart, beats $24 for a higher end one that’s for sure. I will keep repurchasing.
Date published: 2019-01-30
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How do you get it to dispense the eyeliner? My brush has no black eyeliner on it and I’ve tired everything 

Asked by: Loveydove
It's important to vigorously shake the eyeliner pen several times. Then, get one square of tissue paper and immediately after having shaken the eyeliner pen, make a small line on the paper rotating several times. This works for me.
Answered by: Paulymom1
Date published: 2022-01-16

Does this usually run out in like two weeks.

Asked by: Cindy
It might last about a month.   When it starts to run out, flex the brush within the cap before you cap it.  It helps to get a little more liquid into the brush for next time.  It does seem to run out quicker than it should but I won’t change brands.
Answered by: Ellenoforegon
Date published: 2022-01-16

Does this still come in brown?  I don’t see any color choices here and am assuming this one is black.

Asked by: Liftemup
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