Medik8 Hydr8 B5 Liquid Rehydration Serum 30ml

Medik8 Authentic
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Medik8 Hydr8 B5 Liquid Rehydration Serum 30ml by Medik8


Restore vitality and enhance hydration with this bestselling Hydr8 B5 Serum from the skincare experts at Medik8. Containing a nourishing blend of moisture-boosting Hyaluronic Acid and skin-softening Vitamin B5, this face serum is a must-have for all skin types suffering from dehydration and tiredness.

This moisturising serum has a weightless texture, allowing for easy and fast absorption. With regular use as part of a morning and evening skincare routine, Hydr8 B5 dramatically improves skin texture and enhances luminosity. The moisture boost helps diminish dehydration lines, dryness, and irritation.

Medik8 prides itself on results-driven skincare. The beauty brand crafts facial cleansers, sun protection, and everything in between to nourish skin with potent actives delivered gently. Hydr8 B5 Serum is a bestselling skin serum, known and loved for its ability to quench thirsty skin and keep your complexion healthy.


What are the key benefits of Medik8 Hydr8 B5 Liquid Rehydration Serum?

  • Deeply hydrating serum containing Vitamin B5 and Hyaluronic Acid
  • Leaves skin hydrated, plump and smooth
  • Boosts moisture retention
  • Softens the appearance of fine lines and wrinkles
  • Lightweight and easily absorbed gel formulation
  • Can be applied as both a day and night serum
  • Vegan and cruelty-free
  • Suitable for all skin types
  • 30ml

What are the key ingredients in Medik8 Hydr8 B5 Serum?

There are two main actives in Medik8 Hydr8 B5 Serum: Hyaluronic Acid and Pantothenic Acid, the latter of which is commonly known as Vitamin B5.

Hyaluronic Acid is known for its moisture-retaining abilities, as it can hold 1,000 times its own weight in water. When applied to the skin, this ingredient provides an instant hydration boost, which helps to rebalance moisture levels in dehydrated and dry skin. Hyaluronic Acid also helps to increase skin suppleness, improve skin luminosity, and reduce the appearance of dehydration-induced fine lines and wrinkles. The fast-absorbing and weightless texture of Hyaluronic Acid makes it perfect for all skin types.

Pantothenic Acid, or Vitamin B5, is a skin-softening ingredient used to help smooth skin and improve skin texture. The anti-inflammatory and anti-itching qualities of this vitamin help stimulate skin healing to reverse irritation or damage.


Which skin type does Medik8 Hydr8 B5 Serum suit best?

Medik8 Hydr8 B5 Serum is suitable for all skin types due to its oil-free formulation and fast-absorbing texture. This serum provides a much-needed moisture boost to dry and dehydrated complexions. The product also helps rebalance moisture levels in oily skin. The anti-inflammatory and anti-itching properties of Hydr8 B5 serum make it ideal for those with sensitive and irritated skin.


How should Medik8 Hydr8 B5 Serum be applied?

This hydrating serum can be used in both a morning and evening skincare routine.

  • After cleansing, apply 5 to 6 drops to your fingertips and blend into the face, neck, and decolletage.
  • Alternatively, you can apply the serum directly to the skin.
  • Be sure the pipette does not touch the skin.
  • In the morning, follow with a moisturiser and SPF. 
  • In the evening, follow with a night moisturiser. 
  • Hydr8 B5 can also be added to any moisturiser to boost hydration levels in one step.

Unfortunately, Medik8 is not available for shipping outside of Australia. 

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Reviews (54)
Review and earn
Not good - 14-01-2019 by

I bought 2 bottles at once after seeing so many good reviews, just started 1st bottle and I wanna return. Lightweight, fast-absorbing, yes, but it balls up on skin every time! Even the remaining product on my palm, still roll up if you rub it... With such an expensive product, not even better than the Ordinary HA

The best serum - 09-01-2019 by

I absolutely love this serum. It is very hydrating but doesn't leave my skin feeling oily, it soaks in straight away. It has really improved my skin texture and reduced the severity of my breakouts. It sits really nicely under moisturiser and foundation.

Great product - 04-01-2019 by

Water like feel. Glides on. Not sticky. Skin feels hydrated. No heavy scent. Will buy again

Very Hydrating - 17-12-2018 by

I have oily yet dehydrated skin and the Medik8 serum did wonders in helping regulate my oiliness and hydrate the dehydrated areas.

I usually use the serum after having derma rolled my face for optimum effectiveness and I find my skin is more hydrate and plump after every use.

I would recommend to anyone with dehydrated or dull skin but also for people with combination or oily skin types looking for a non-greasy moisturising alternative.

Great but slightly expensive - 16-12-2018 by

Got a sample from Adore Beauty. It felt great after application and did not cause breakout/oiliness. I bought a full sized one after the trial. I really love how it feels on my skin.

I have combination to oily skin and had difficulty getting the right skincare product that does not make it worse. This is definitely becoming part of my skincare routine. I love it. The downside is the price.

Great Hydrating Serum - 10-12-2018 by

I have combination skin and would be dry and oily in different areas on my face, this has calmed everything down. I put this on under my MEDIK8 BALANCE MOISTURISER every morning before my make up and my make up sits beautifully all day, where as before i would go extremely shiny due to my oily skin in places.

Super Hydrating - 10-12-2018 by

Best serum for dry and aging skin, always feels amazing to use on my face and neck and I apply it every day under my Advanced Day Total Protect Anti Aging moisturiser. It keeps my skin well hydrated!

Love!! - 09-12-2018 by

I received this as a sample, finally got around to using it and I didn’t expect much but my dry skin felt so supple, fresh and hydrated!! I was amazed and addicted! Safe to say the sample bottle didn’t last very long..

Incredible option for sensitive skin! - 06-12-2018 by

This is an AMAZING, repeat, AMAZING for sensitive skin prone to dryness and redness. I have rosacea which is triggered by so many things- not this! Hydrates and makes a visible difference to my skin with no irritation.

Super Hydrating! - 27-11-2018 by

Was recommended this product by my beautician and have loved it ever since. I combine this with the redness reducing cream day and night and have noticed a massive difference in the reduced redness through my cheeks and forehead. If only it wasn't so expensive; but worth it.

a must for hydration - 22-11-2018 by

i use this product every night under my night cream. a must if you are struggling with hydration and skin texture. highly recommend !!

Lifechanging - 20-11-2018 by

I noticed a difference overnight, this serum has been life-changing for my skin! It's improved moisture, texture and skin feels and looks so so much better

Best hydrating serum! - 19-11-2018 by

This hydrating serum is the best I’ve used. It’s quite thick and takes a good minute to properly sink in but leaves skin so hydrated and smooth. It has completely stopped any flaking or dryness of my skin.

Bought on recommendation by beautician - 15-11-2018 by

I use this product after chemical peels, skin needling and a little every other day when I’m feeling my skin is a bit dry. Ultimate hydration. Repeat puchaser of this product. I used to use oils and still have dry skin, no comparison to this serum

Lightweight moisture - 06-11-2018 by

Struggling with oily skin this serum acts as a lightweight and quick drying moisturiser. My face feels soft and fresh. I have only tried at night but reading other reviews it might be a great base for daytime under makeup.

Best Hydrating serum - 02-11-2018 by

My skin is really sensitive and dry. I tend to get bad reaction to products easily so needed something to help hydrate my skin. This product is amazing ! Would defiantly recommend. Will buy another when this one runs out

Stunning serum for summer - 02-11-2018 by

I’m on my second bottle of this stuff and I do absoloutely love it. I cannot wear moisturisers in the Australian summer and I am happy wearing this alone or before my medik8 vitamin c serum (which is still hard to wear during summer days) the only thing I wish is that it was a pump that dispersed the correct amount each time as I went through my first bottle way too quickly for the price. This is easy to do with the dropper and trying to manage this with my second bottle. Great for oily skin, and as a makeup base as it’s not heavy at all. Love medik8

Feels Amazing - 30-10-2018 by

Love the feel of this.Soaks in and makes you feel so moisturised.
Would definitely recommend if you get quite dry over the winter period.

Really nice - 29-10-2018 by

This is a really nice serum. I’ve tried many HA B5 serums and thought they were all the same until I tried this one. This is the first one I’ve used that dries down to a non sticky finish. Loving the quality

Worth the $$ - 24-10-2018 by

Super impressed with this. I get really dry skin and this is the only product I've found that helps to instantly get rid of my dry, flaky patches. Skin is very moisturised but not heavy or tight. It's a bit expensive but it's worth it since it keeps my skin feeling nice all day.

Favourite Serum - 23-10-2018 by

I have been using this daily for almost a year or so - I began using it prior to my wedding and never stopped. I usually get quite dry skin, especially in the colder seasons, but using this daily under my moisturiser has hugely prevented the need for additional hydration masks. A favourite.

Not for me - 23-10-2018 by

I was disappointed that this made my skin red & blotchy as other reviewers rave about this product! It did make my skin feel softer, no effect on fine lines but I had to discontinue use due to the rash. I do have very sensitive skin though.

Excellent serum. - 18-10-2018 by

I apply this serum morning and night religiously. I have had dehydrated skin which was of a great concern to me and has been for a long time. I researched various hydrating serums on the market and found that the Medik 8 Hydra B serum had the best and safest ingredient skin care. I have honestly noticed a difference in the hydration level's in my skin and I also use it on my neck. Best brand and serum and greatly appreciated, only wish I had started using it years ago.

It works - 11-10-2018 by

This is a beautiful product. I have used a lot of similar hydration products in the past and this one is by far the fastest absorbing. Many others leave your skin slightly sticky but this one doesn’t, it fully absorbs.

So good - 11-10-2018 by

This is a really good serum. Its great to use especially during winter.

liquid gold - 04-10-2018 by

I have used a lot of hydration products and this one is on top of my list. It absorbs really quickly and leaves my skin feeling super hydrated. Use it in conjunction with the Tetra C cream and you will be in heaven.

Great product, high price tag - 04-10-2018 by

My therapist recommended this product after I had skin needling and peels. It’s a great product. It’s like giving your skin a big drink of water! Settles nicely into the skin, no residue. The only negative is the price, there are other similar products out there for less $

Caused Terrible Breakouts - 02-10-2018 by

I wanted to love this serum so badly, but unfortunately it broke me out every time I used it. I tested it several times and when I would discontinue using it, my skin would clear up right away. As soon as I reintroduced the serum, I would have small red pimples within 24 hours. If it didn't cause such severe breakouts, I would have loved it. It does feel great on the skin and I think it made my skin look more glow-y, but unfortunately it's supposed to be non-non-comedogenic and that just wasn't true for me at all. I don't even have oily or acne-prone skin so it was very surprising!

Cannot recommend enough - 01-10-2018 by

This does absolute wonders to my skin. I have combination skin that has a super oily tzone but tight and dry cheeks. Especially in the beginning of spring and beginning of autumn, my skin gets extra dry and flakey and tzone gets oilier. This is the best thing to apply to HYDRATE my skin right after cleaning my face with a towel, followed by a cream to MOISTURISE and lock in the extra hydration my skin needs.

Must try product - 24-09-2018 by

The best B5 serum I've ever tried. Great for oily and pigmentation skin. Will repurchase it <3.

Yes yes yes! - 21-09-2018 by

My skin therapist recommends Medik8 and I am hooked. This was the first serum I took on from the range and I now use it day and night. I now use it in conjunction with Serum C in the morning. Super hydrating. Will be purchasing this over and over again!

Beautiful on the skin - 13-09-2018 by

Love love love. Constantly repurchasing!!

Fantastic Serum - 10-09-2018 by

Another great Medik8 product! This serum goes on so well, and only a few drops needed. I’m so happy with how my ageing skin looks improved using this serum along with other Medik8 products. Will continue to use!

Nothing Compares! - 27-08-2018 by

I keep coming back to this serum time after time. Yes, it’s pricey which is why I switch to other brands in hopes of achieving the same results, but nothing compares to this amazing product!
You only need 3-4 drops to cover the entire face and neck area. The texture is light and gives enough time to spread across your face and neck. At first it feels like it’s going to be sticky, but that quickly disappears and your skin is left smooth to the touch.
I use this both AM and PM. In the morning I layer it over a vitamin C serum followed by a SPF - I don’t use a moisturiser as I have very oily skin and find this serum enough to hydrate my skin during the day. In the evening I layer it over either a vitamin B or retinol serum, and then followed by a face oil.
The end result is smooth, plump, and hydrated skin.
I can’t recommend Medik8’s Hydr8 B5 enough! It’s amazing!

Holy Grail - 24-08-2018 by

My beauty therapist recommending this product and I have noticed an improvement in only a week! My skin is a lot more hydrated, plump and lively. Will definitely repurchase after this bottle!

Great but too pricey. - 16-08-2018 by

I loved how this serum plumped up and hydrated my skin and absorbed quickly. But because there is so many other brands that are more competitively priced I will not be repurchasing this as it is too expensive for a simple hyaluronic acid serum.

Lovely, but pricey - 15-08-2018 by

I have been using Ordinary serums for a while and was interested to try a different brand.
I have oily skin with dry cheek patches which can flare up in winter. Using this serum in the evening worked well and in the morning my skin looked hydrated and fresh.
I would recommend and think it is slightly better than the serum I have been using, but it is a lot more pricey!

Amazing even for oily skin! - 13-08-2018 by

Having oily skin, I would always stay away from anything marketed as 'hydrating' out of fear it would make my skin an oil slick. Oh how wrong I was! After a little bit of education I learned that my skin was probably producing excess oil to make up for the fact it was dehydrated and lacking in moisture. I use this at night time for a boost of hydration, and it helps my skin look plump, smooth, and without pesky dry patches from breakouts. My skin is visibly less oily overall, I'm converted!

Medik8 Hydr8 B5 Brilliant - 13-08-2018 by

I just love this product. It glides on smoothly and feels great on your skin. I can feel the difference straight away. Definately will buy this product again!

Fantastic bottle applicator. - 07-08-2018 by

I have reviewed this product before and love it, but I would just like to tell you how strong the bottle itself is. I have accidentally dropped it twice onto our tiled bathroom floor, to my absolute horror. I am very pleased to tell you that the bottle didn't break on both occasions. I couldn't believe it when I looked down to the floor as I thought it would have smashed everywhere. Perfect product!

Simple good product - 06-08-2018 by

I use this product daily. Morning and night. A simple serum that is easily absorbed. No residue and can easily apply makeup over the top.

Just as described! - 31-07-2018 by

It performs just as the description outlines. It is a great, light gel-type serum that leaves my skin feeling plump. My skin is sits on the dry side but this is great to use even without moisturiser. I would definitely recommend this product.

Love this! - 25-07-2018 by

I love this! I’ve only been using it for a week now & I can already see & feel a difference in my skin. My skin was dull & dehydrated before, it’s so much brighter now! I would definitely recommend!

Absolutely amazing! - 18-07-2018 by

I got this as a sample from Adore Beauty a while ago. I absolutely loved it

Really soft skin after using this - 12-07-2018 by

This works very well under makeup to stop my makeup from looking cakey and dry when wearing powders, it makes me skin really moisturised and soft and I’m glad I decided to try it because I can’t imagine not using this serum now,

Ive found my holy grail. - 12-07-2018 by

I have dehydrated combination skin and i needed a hydrating serum that was able to remove my dry flakiness under my eyes. After trying multiple products, the Medik8 saved my skin and brought it back to life. Only after 1 weeks use, the flakes were gone and my under eye was has hydrated as ever. I will always recommenced this to anyone looking to add hydration back into their skin.

Holy Grail Hydrating Serum! - 06-07-2018 by

I have been through soooo many bottles of this stuff, it is like liquid gold!! I am definitely loving the new packaging too, so classy!! I use this morning and night. Seriously love it! x

The bomb! - 04-07-2018 by

This product is amazing, really hydrating and instantly gives me a glow. I use it as a base before my moisturiser, day and night. Highly recommended:)

Lovely hydrating serum - 04-07-2018 by

This is a nice lightweight serum to help hydrate the skin. I have combination oily skin and I found this didn't irritate my skin and was easy to use in combination with other serums or moisturisers.

amazing - 29-06-2018 by

i have combo-oily skin and whenever i use this serum, i can actually feel my skin has less breakouts/acne. it's so lightweight and i love the consistency because it really feels like nothing after you thoroughly pats it down on the face and follow it with skincare routine. very hydrating and i mostly use this in the winter. the only downside is that the price is a bit too pricey, but overall it's an amazing serum

Product that has become a staple for me - 19-06-2018 by

I am in my forties with sundamaged skin. I love a lot of the Medik8 products I have tried but this one is one of the ones that I don’t like being without. I have tried numerous hyaluronic acid products in the past and this is the only one I like. The others break me out- and despite having dry to combination skin I am used to having minimal breakouts. I can’t say I notice the difference when I am using it- but as soon as I am without it my skin looks and feels dry. A great product!

Beautiful Serum - 18-06-2018 by

I have normal skin with a little oil in the t-zone, but my skin can feel very dehydrated at times and when I smile sometimes it feels as though it will crack, if that makes sense. I have only been using this product for two weeks and I am very happy that I did purchase it, after reading many reviews on beauty blog's, magazines etc, which all gave it rave reviews. Lovely texture with dropper style bottle.

Definitely works - 16-06-2018 by

This is my favourite b5 / hyaluronic acid serum, and I have tried multiple brands! Hydrating and plumps fine lines, absorbs quickly and doesn't interfere with makeup or other products you want to use after. Also really soothing and calming. I've tried other more expensive versions of b5 and they aren't anywhere near as effective as this. Definitely my go to living in a cool climate and working in air con, and will re purchase again and again. Up to my 5th bottle so far I think, and you don't need much.

Lovely - 14-06-2018 by

This is a lovely hyaluronic serum with a light gel consistency. I also love Medik8 as a brand, and the fact that this is vegan and cruelty-free. I received this as a gift with purchase and loved it, but had to take one star off for the price. As much as I like this serum, I'm not sure I could justify paying so much on a regular basis for a hydrating serum. If you've got the cash, though, go for it!

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