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Bk – Rejuvenation Eye Serum

Kakadu Plum
38 reviews

Bk Rejuvenation Serum contains high levels of natural, stabilised vitamin C and antioxidants, which helps reduce dark circles, diminishes fine lines and firms delicate skin. Being a potent, water soluble serum, Bk has the ability to penetrate deeply into the dermis.

CLECSOur unique extraction method, giving you 100% active, natural and stable vitamin C like no one else, extracted purely from Australian native Kakadu Plum.

Primarily designed as an eye serum, Bk serum can also be used as a full-face Vitamin C serum for anyone concerned with anti-ageing, pigmentation or redness.

As well as being incredibly high in naturally occurring Vitamin C, Kakadu Plum contains two compounds that have unique skin efficacies.

  • Gallic acid is highly protective, helping to target sun spots and dark circles and assists in calming the skin
  • Ellagic acid is brightening and helps defend against UV exposure, reducing photo-ageing.


  • 15ml
  • 5ml

or 4 fortnightly payments from $6.25 with Afterpay

Why choose Bk - Rejuvenation Eye Serum ?

How to use

38 reviews for Bk – Rejuvenation Eye Serum

  1. Katlyn Landes (verified owner)

    I have been using Bk for almost a year, and it is easily the most effective undereye treatment I have ever used. I am still in my 20s, so I mainly use it preventatively. I did have the beginnings of some small lines under my eyes, but they were gone within a few weeks after starting Bk. It also helps with undereye puffiness. I have a very sensitive undereye area, and this product has never irritated my skin! I haven’t used it as a multipurpose face serum yet, but I love that I have the option!

  2. nana bagashvili

    Vitamin C as a strong antioxidant is so important for our daily protection (free radicals, pollution etc.) that’s why my morning starts with Bk (all over my face+neck) followed by the sunscreen. Immediately it evens the skin tone and makes it look healthier and very soft. Most importantly, all Biologi serums (Yes i purchased the whole range and I’m using all of them, alternating am and pm ) sink into the skin perfectly and absorbs quickly, so in a couple of minutes you are ready to put on sunscreen and enjoy the day…

  3. Gabby (verified owner)

    I love this eye serum. I’ve never really used eye products as I didn’t think I needed to, but I absolutely love the Biologi range so I thought I’d give it a go, and I’m totally converted! I use it morning and night around my eye area and I have seen a massive improvement in the fine lines around my eyes. You don’t need much as a little goes a long way. Definitely will be repurchasing

  4. Eva (verified owner)

    I am normally very sceptical about products, as after spending a lot of money on new stuff I would always end up going back to same cream that is used for eczema, ichthyosis etc. Every time I have tried a new product for the first few days I would be happy but then dry patches would appear, and my skin would start looking dry and I was uncomfortable using makeup on my skin as I was afraid all the patches would show.

    One day I was listing to a podcast and I came across Matt and Biologi, being plant based and interested in different vitamins and minerals we get from plants this made me think…I ordered small bottles of Bd and Bk not getting my hopes up…
    I am so happy I was wrong, the results I got were amazing. After just two weeks, I ordered a large Bk and Bd and I love it, I have been using the serum for 3 months now and I am still so happy with it. (
    I go to hot yoga most days, and gosh we sweat there, and we wipe of full faces of sweat (sorry gross) but now I am not rushing to apply cream as my skin stays mousturised after class.

    Now when I am out I may put small amount of foundation but not much as I like my skin now.

    I have a teenage daughter and she uses the Br serum to control her spots and bring a glow to her skin and we are both so pleased with the results, she uses it twice a day, and her skin looks so much healthier, and just like I, we couldn’t be happier.

    This skin product has really changed my skin care routine, I don’t feel the need to put foundation on as my skin looks so fresh and healthy, I even get comments how my skin is glowing and it makes me so much more confident about the way my skin looks.

    Thank you again.


  5. Holly K

    I am the first person to give something or someone a chance regardless of what it is, but I’m also the first to stop doing/using it if it doesn’t work.
    I’ve met my absolute match! I have gone from brand to brand 10 times and back again, from the most expensive to the cheapest drug store serum, read 1000 reviews and transitioned my way to organic and natural skin care – all to find it still failed me.
    I take pride on what I put on my body and wanted something Aussie made, clean and something that just WORKS for a change! I’m beyond grateful for how my skin has transformed since using this brands products. Bring back nature! I’m all about supporting a genuine business and I love this one! Thanks Bioligi xx

  6. Jules

    My favourite face serum, ever!!
    Have tried many thing in skincare and this is genuinely amazing!!
    Did not experience any purging just glowing skin! This is just a beautiful, potent all natural powerhouse of a product. Gets my glow on!
    As it faded pigmentation, new quite dark pigmentation spots appeared, which may have been deeper layers, covered by the lighter pigmentation that had faded. Happy to say, these too are disappearing over time. People at work are asking what I am using, I don’t wear make up to work.
    Skin is plumped, firm, bright and the best it has looked in years. This is all I use now. So, so happy. Works really well under my natural zinc sun protection.
    Everyone needs to have these products.
    Have been using for a few months, to see how they really work and can say they continue to improve your skin overtime.
    So in love with all Biologi products. Thank you Biologi

  7. Chiara

    A truly beautiful product. I use all over my face and it leaves my skin glowing, and fine lines look reduced. I had no negative effects with this products, it has continuously given me positive results. Please make this in a larger bottle, I would pay for that!!

  8. franceena.symes (verified owner)

    I just wanted to let you all know how much I’ve been loving my Biologi products! I’ve been using the Bd, Bf and Bk daily, since April, and last week I added the Bqk range and have been using that every other day.

    I’ve always chosen to be more organic/natural with what I put in and on my body, so when I discovered your products, it was a no brainer that I’d be giving this product a good go! I stopped using all my other products immediately and only used the Biologi range as I wanted to see what it could do for me if being used correctly and whilst at its full potential. My skin never purged so after about 2 weeks I was confident enough in Biologi, and threw away all my old skin care products, and I’ve never looked back!

    I’ve never really had bad skin problems so I don’t have any miracles stories/images like some other customers, but I’ve always suffered from sensitive/sensitised skin i.e. I’d get windburn/dry skin on my cheeks when it’s really cold, most sunscreens sting my skin, even my tears make my skin sting! But after using your products I’ve found that none of the above have happened. My skin is definitely more hydrated, glowy and just feels good in general and I can’t say how pleased I am with the results – so, thank you for your amazing work. I am forever grateful to not be conned into buying these so-called healthy/natural products in the chemists/supermarkets anymore, as I’m now (thanks to you guys) more educated as to what is what in the ingredients etc and can share my new-found knowledge with whoever will listen!!

  9. Kaydeen (verified owner)

    I have tried so many products and have wasted so much money and so stoked to say I have truly invested in something so great with Biologi Serums. They have changed my life! I suffer from eczema, sensitive and dry skin and this has definitely helped during this winter season keeping my eye area hydrated. THANK YOU!

  10. Sally (verified owner)

    Remarkable! My under-eyes look amazing! Dark circles dramatically reduced, fine lines almost non-existent, pigmentation nearly gone & my whole face looking so much brighter & smoother! Alternating with the other serums on my whole face at night or just under the eyes daily. As a mid-30’s, mum of 3, I needed a simple & reliable skin care routine, purchased during the recent offer of a free travel set with any purchase & I am not disappointed, in fact I have since ordered the other 2 full size as I simply cannot go back now! Soooo worth the investment as only 1 pump is needed – just wash, dry & apply the serum 🙌🏻

  11. Stefanie

    The biologi products are amazing. I have sensitive skin and rosacea. Neither has been a problem since using these serums. The eye serum in particular is great. I use it all over my face and is a great base for makeup (light powder). The serums have also been great for my teenage daughter’s acne prone skin. You can see it starting to heal the skin and her outbreaks have reduced significantly. To say we are relieved is an understatement.

  12. Priscilla

    I am more than happy actually ecstatic after finding the eye serum. I have Sjögren’s syndrome and my eyes are very sensitive to everything under the sun. I have spend thousands of dollars looking for an eye cream/ serum which won’t irritate my eyes.
    Finally I found something I can honestly say is the best. I use the eye serum all over my face morning and night. Love how it feels and the glow it gives me. I apply foundation direct over the serum. No moisturiser needed.
    Thank you Biologi for an amazing product.

  13. Lara (verified owner)

    I love Biologi. I have used hundreds of different products over the years to help with acne and this has had the greatest effect. I use this along with the Bd. But i felt that when I started using this one it helped a lot with reducing old spots. Will never use another brand again. It is a bit sticky and it does work slowly and i still do get the occasional breakout but they clear up quicker and my skin is just looking so much healthier.

  14. Donatella Parisini

    I tried so many hydrating creams and serums in the last 40 years … finally, the Biologi serums found me!
    It’s a year I’m using them all , in love with Biologi rejuvenating serum… my skin can’t live without them. Light and illuminating,
    Highly recommended.

  15. Daars Nadarajan

    In love with this product! I was a travel size as a gift but was skeptical that it will help reduce the acne scar on my face but after reading reviews I decided to give it a try. I have only been using it for a week but I woke up with brighter and plumper skin with just one use. I have been using it for about 10 days now and my scars have visibly reduced. I don’t use foundation any more! Cant wait to buy a whole set now!

  16. Emma (verified owner)

    This product has totally transformed my skin. I no longer have puffy eyes with dark circles. My skin has never been so clear and even toned. And fine lines have all but disappeared.
    I wish I had known about this product sooner but am so happy I have it now. Thanks Biologi

  17. Kathryn Kwok

    Such a beautiful serum! Literally wake up glowing and looking more plump. Using the BD and BK has healed my acne. I will never use anything else 🙂

  18. Olivia Main

    As a mum I am always tired! But i find that other eye serums are oily and run into the eye, creating irritation! I find Biologi eye serum amazing, removes fine lines without turning my face into a shiny oily mess. With little kids, its vital that i use all natural products as they are constantly touching my face- this range ticks all of the boxes for me!

  19. pia.simone

    After switching to all completely natural skincare, make up, hair care etc nearly 4 years ago I have tried quite a few different natural skincare brands in hopes it would clear my mild acne, acne scarring, uneven skin tone and redness. All pale in comparison to Biologi. The hydration is second to none, my skin looks luminous, clear and happy, finally!
    I use all 3 serums and alternate with my skins needs.
    Bk is excellent at night under the eyes or whole face if my skin needs a boost, definitely notice a difference in the darkness under the eye and reduced fine lines – at 36 I need that!
    It makes skin literally glow!
    Most times now I can add a little cream stick concealer and thats all I need, when I used to not leave the house without a full face of mineral powder foundation on,

    My partner commented on how great my skin looks and now steals it too!
    You guys are amazing!!

    Any chance you’ll produce a Cleanser & Exfoliant..?? 🙂

  20. lauren.heydenrych (verified owner)

    I wasn’t sure if I really needed this product when I first started using biologi as I don’t really have any issues around or under my eyes BUT prevention is key .

    I have notice a difference in how dark the skin was under my eyes and I also use this over my whole face at night when my skin needs a little extra boost

  21. erinvlloyd

    Surprisingly I have found this product to be most beneficial on cystic acne (as well as a great hydrating serum)! I apply this serum to my entire face under makeup for work and then on a clean face before bed and have found that almost instantly it starts to reduce inflammation, redness, size etc. I don’t have any dry skin or patchy areas like other zip zapping medications after use. Possibly I believe this serum is even helping to reduce the surface scars caused by cystic acne and at 32 years of age that is fantastic!

    Love it.

  22. Lou (verified owner)

    I don’t have very deep lines around my eyes, but as I’m getting older (now mid 30s) my eye area was starting to look a bit more dehydrated. Makeup was starting sit in the fine lines around my eyes. I don’t have this problem anymore! Since using this serum my eye area is so plump and hydrated and now I have barely any signs of noticeable aging around my eyes. My makeup looks much better too 🙂 thanks Biologi ❤️

  23. Michelle Davidson (verified owner)

    So pleased to have come across this amazing product with age and sun the lines around the eyes were showing, not great! Now I can see a difference the lines have softened and skin feels really hydrated. After wasting lots of money on products over the years, what this has achieved in a very short time is amazing! Used to hate doing morning/evening routine but now I love it! Could go on about these products but I suggest you try them for yourself. Very happy customer 💕

  24. Amanda Tait

    Since starting Bk at night I can honestly say my skin has never felt better! my pores have diminished and my skin feels so hydrated and healthy. I cant imagine going back to other products now, this and Bd is all I need.. which is a big call coming from someone with a skincare addiction like mine. Once you try it and see the changes occur in your skin, you will be hooked on that glowy and plump skin feeling!

  25. monique

    Liquid gold! Everyone needs this serum in there life! My skin looked brighter overnight – I loveeee it!

  26. Yaz (verified owner)

    Having previously struggled with dryness and flaking with other actives such retinol, Bk has been a saviour. I use Bk daily around my eyes and all over my face at least once a week and my skin is always glowing the next day. A must for any skin care routine.

  27. Ashleigh

    I swear once I started using the Bk serum my skin has become so plump and my pores look like they’re disappearing. I have really enjoyed this new addition to my skincare routine. My skin has become softer/healthier and has given me a beautiful glow..Great for sensitive skin to 😊

    If your looking for a flawless, youthful appearance the Bk serum is for you!

  28. Caitlin (verified owner)

    A saviour in a bottle! Earlier this winter the skin around my eyes was dry, irritated and inflamed. After just a few days of using the Bk serum I noticed an amazing improvement. 2 months on, not only is the skin around my eyes soft, hydrated and happy, my fine lines from dehydration have disappeared! I also pop this on my lips under my SPF lip balm and it keeps them hydrated and plump!

  29. Romy

    WARNING! THIS IS A GAME CHANGER!!!!!!!! I’m telling you, if you don’t want to live with the same problem skin you are right now, you NEED BK! I’m a skeptic, and after using Bk on my entire face overnight, I was sold! This is by far the best product I have ever used. And it’s all I use! Night time I use Bk, day time I use Bd. I wash my face and then these are the only two products I use. My husband is low key stoked about all the extra bathroom bench space by the way. My face has a much more even skin tone all over, it is always hydrated (even now in the windy cold Winter), I rarely have a breakout anymore, it feels more plump and looks younger. The best bit is the compliments when other people notice the difference! Personally I’d like to keep it to myself and be the only one looking younger…. but this game changer is making HUGE disruptions to the beauty industry, and you were going to find out about it anyway, so I thought I’d share my opinion of this liquid gold! Do yourself a favour 😉

  30. Lucie

    They say “less is more” –
    and in Biologi’s case, this is outstandingly true.

    Firstly, you need to know that I am a self-confessed skincare ‘junkie’ who has been on a consistent (ever hopeful) search for that elusive ‘unicorn’ of a product:

    ie: Something that is so 100% natural (that you could eat it) – but that also actually WORKS for someone in their mid 40’s whose skin is temperamental (to say the least) and has an unruly mind of its own.

    I mean, I finally got rid of Pimples… only to discover my first Wrinkle (who then invited MORE to the party) … then BOTH usurpers decided to hang out together – and invite Pigmentation into the mix!

    Awesome (not).

    Finding products to address ALL my issues meant a LOT of (expensive) trial and error and the endless ‘layering’ of many products (PLUS precious TIME).

    Then, finally finding a results-producing routine – only to have life (and the weather) change (slightly) and woohoo all bets are off.

    Honestly – my skin is like a rebellious teenager who will ALWAYS act up when I’m going somewhere important. Sigh.

    I had resigned myself to looking ancient one day with biscuit dry skin and discolouration (cleverly concealed) to oily teenage breakout skin the next.
    double sigh.

    I was also BORED hearing about what isn’t possible in the skincare world and about preservatives and additives (etc) ALWAYS being necessary (blah blah blah – yawn)

    Well, thank goodness Ross M, didn’t take any notice of this either 😉

    Innovation in any field excites me – but in the natural skincare world …? Well, Biologi had ME at ‘stable natural vitamin C extract’ (which has always had that ‘impossible’ word attached to it)
    *(pssst… That white Ascorbic acid powder isn’t a ‘true’ and whole vitamin C – and this is proven when you realise that it can’t cure anyone of scurvy – anyway I digress… 😉

    So… ever the hopeful… It was with great interest (but no expectations) that I embarked upon my Biologi journey.

    I’ve been trialling Bk (around eyes) for about 6 weeks (along with the rest of Biologi’s Australian native skincare family). and am about to embark on the night-time routine.

    My verdict so far?

    Simple – Yep … I 100% agree with what everyone else on the reviews has already said.

    I also don’t have to worry about any synthetic anythings being absorbed into my PEA brain (ha) and causing long or short-term issues (wink).

    So there you have it – Less is more:

    LESS time, fuss, steps, confusion, allergy concerns etc
    MORE results, consistent and stable delicate eye skin balance, regenerative anti-aging powers – naturally.

    … and the BEST part of all … ?

    A natural product that really and truly works with ZERO toxins = Peace of mind.

    x x x x x (five-star kisses from me)

  31. Stacey

    Bk is an amazing product!
    I don’t know how I survived before I discovered this little beauty! I’ve never found a product to target my eye area which I actually received results from, from cheap to expensive, most products with the word eye on the packaging started to make me feel it was all a gimmick!
    Until I tried Bk! Confidence in a bottle, I could feel the difference it had on my skin! AND see it my friends were also commenting and saying something was different! I looked like I was glowing!

  32. Niki Wright (nz)

    I absolutely love this product. My fine lines are reducing and my skin is so hydrated and smooth. I love the fact that it is 100% organic and natural. Thanks Biologi

  33. Judi Smith

    I have generous smiles lines around my eyes from doing a lot of it. At 64 years I accepted that. Then started using Bk after a friend suggested I just “try it” and immediately the lines softened. Then spread Bk to the brow lines and they too diminished. Using Bk around the mouth now. You only need a drop as it spreads easily. A bottle lasts me 3 months. Try it too. And keep smiling.

  34. Shelley Mcilvride

    This is by far one of my favourite products. I had pigmentation under my eye that couldn’t be treated with laser and this has totally reduced the appearance of it. LOVE IT!

  35. Sarah Sorbello (verified owner)

    To finally find an eye serum that is giving me the results of crows feet lines fading is a Godsend , this serum keeps my face still looking fresh

  36. Suzie

    Bk the little pocket rock that has not only dealt a heavy blow to the wrinkles around my eyes but those around my mouth, and what blows me away most is how Bk deals with sun damage! Kissing it goodbye!

  37. Olivia Griffiths (verified owner)

    Bk makes me wake up feeling like I don’t need to put on make-up, it has hydrated my eye area and stopped me getting milia, those hard white dots, around my eyes. I use this on my face at night too which makes me super hydrated and I no longer need to use any form of moisturiser. I also always put a dab across a neck scar from a recent surgery – it’s softening the scar tissue for that too!

  38. kelly_j_29 (verified owner)

    Absolutely in love with this product! I have never really found a skincare product/regime that has worked for me enough to use long term. I have always used different products and brands and never really stuck with anything in the contstant search for results. This serum is so incredibly hydrating! I have not needed to moisturise (something I usually need to do religiously!) and it has greatly improved the texture and luminosity of my skin after just a few weeks. Cannot wait to try the entire range!

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