Biologi - Bk - eye/face serum - Brightening


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Biologi Bk serum 

Bk serum contains high levels of vitamin C to diminish fine lines and firm delicate skin. Primarily designed as an eye serum, Bk serum can also be used as a full-face serum for anyone concerned with anti-ageing, pigmentation or redness.

How to use

You can use all biologi serums all over your face too! We suggest starting with the Bf serum for AM sure , and adding  Bk 2-3 times a week as a nightly serum for dehydrated/ pigmented skins or Bd ( coming soon) for oily/acne skins.  This product takes the place of your mists and your moisturisers, it really is an all in one. It's vert important that you do not mix it with any other moisturisers or oils, as it is active, you will void all of the actives. Wait a few minutes before applying sunscreen.


Our founder Natalie used BF alone every am ( you don't need a mist or a moisturiser, just your sunscreen over the top!) and follows up by alternating the gold balm/gold oil combination and Bk every second night for GLOWING, HYDRATED SKIN. 

Vitamin C from a natural source increases the suppleness of skin, reduces fine lines and wrinkles, increases skin elasticity, inhibits melanogenesis and reduces dark circles and sunspots. The powerful active nutrient also helps skin combat damage from harmful UV rays.



  • Anti-ageing
  • Hydration
  • Reduce skin blemishes and redness
  • Anti-oxidant protection from damaging free radicals

How to use 

  • Cleanse thoroughly and dab ½ a pump around the eye area after cleansing
  • To use as a full-face serum, apply one pump to the whole face and neck area after cleansing
  • Week one: apply every second night
  • Week two: apply every night
  • Ongoing: Use daily both morning and night or alternate with Bf 


Kakadu Plum, 0.02% Sodium Benzoate

Phytoactives found 

Gallic acid

Gallic acid is a phenolic acid that works as a potent anti-oxidant, reduces DNA damage, inhibits melanogenesis and improves inflammatory skin disorders.

Why do I need gallic acid?

  • Anti-ageing
  • Reduce sun spots and under eye dark circles
  • Anti-oxidant to protect from free radicals and environmental damage

Ellagic Acid

Another phenolic acid, ellagic acids helps in the treatment of chronic UV exposure, reduces the potential of photoaging, inhibits melanogenesis and reduces membrane liquid peroxidation and DNA damage.

Why do I need ellagic acid?

    • Sunburn
    • Anti-ageing
    • Reduces sun spots and dark under-eye circles
    • Brightens skin

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