No.5 Concentrated Serum 30ml

Regular price £16.00
Taxes included.

Give tired, lacklustre skin a radiant boost with this glow-restoring serum powered by antioxidant-rich vitamins and potent brightening agents. Formulated with Glutathione, Niacinamide, and Alpha-Arbutin, it helps reduce dark spots, even out skin tone, and reveal a luminous complexion.

K-Benefits:

  • Brightening & Radiance Boost – Glutathione, Niacinamide, and Alpha-Arbutin help fade dark spots, acne scars, and pigmentation, leaving skin visibly brighter and more even-toned.

  • Anti-Ageing Protection – Packed with antioxidants to fight free radicals, this serum reduces early signs of aging such as fine lines, wrinkles, and dullness.

  • Hydration & Plumpness – Infused with plant extracts and humectants to deeply hydrate skin, keeping it soft, supple, and refreshed.

  • Soothing & Calming Care – Sugarcane, Turmeric Root, and Mushroom extracts help calm redness, irritation, and acne-related inflammation.

  • Stronger Skin Barrier – Supports and reinforces the skin’s natural moisture barrier for long-term resilience and improved skin health.

  • Acne Mark & Blemish Care – Targets post-acne marks while helping to regulate uneven texture for a smoother complexion.

 

K-Targets
  • Dark spots, acne scars, and stubborn hyperpigmentation – Fades discoloration and post-acne marks for a clearer, more even complexion.
  • Uneven skin tone and dull, tired complexion – Revives skin radiance and restores a healthy, glowing look.
  • Fine lines, wrinkles, and early signs of aging – Delivers antioxidant protection and boosts elasticity to smooth and firm skin.
  • Redness, irritation, and post-acne inflammation – Calms sensitivity while supporting skin recovery from breakouts or environmental stressors.
  • Weakened skin barrier and loss of radiance – Strengthens barrier function to lock in hydration and restore vitality to lackluster skin.

Skin Types: Suitable for all skin types, including sensitive and acne-prone skin.

How to Use
  • Cleanse and tone: your skin to prepare it for the serum.
  • Apply 3-5 drops: of the serum on your entire face.
  • Gently spread: the serum over your skin texture.
  • Pat lightly: to absorb the serum into your skin.
Ingredients

K-Ingredients:

  • Glutathione – A powerful antioxidant that brightens skin, reduces pigmentation, and protects against free radical damage.
  • Niacinamide (Vitamin B3) – Refines pores, improves uneven tone, and strengthens the skin barrier while calming redness.
  • Alpha-Arbutin – A gentle yet effective brightening agent that targets dark spots and hyperpigmentation for a clearer complexion.
  • Vitamin Complex (C + others) – Provides antioxidant protection, boosts collagen production, and enhances skin radiance.
  • Sugarcane Extract – A natural source of gentle exfoliation (AHA-like benefits) that smooths rough skin texture.
  • Turmeric Root Extract – Offers anti-inflammatory and soothing benefits while supporting a healthy glow.
  • Mushroom Extract – Hydrates and reinforces the skin barrier to improve elasticity and resilience.

Full Ingredients:

Vaccinium Vitis-Idaea Fruit Extract, Butylene Glycol, Niacinamide, Panthenol, Tranexamic Acid, Water, 1,2-Hexanediol, Neopentyl Glycol Dicaprate, Caprylic/Capric Triglyceride, Sorbitol, Bifida Ferment Lysate, Chondrus Crispus Extract, Butyrospermum Parkii (Shea) Butter, Saccharum Officinarum (Sugarcane) Extract, Alpha-Arbutin, Sodium Hyaluronate, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (TurmericJRoot Extract, Corallina Officinalis Extract, Tremella Fuciformis (Mushroom) Extract, Pentylene Glycol, Glycerin, 3-0-Ethyl Ascorbic Acid, Bisabolol, Tromethamine, Ethylhexylglycerin, Adenosine, Hydrogenated Lecithin, Allantoin, Glutathione, Ceramide NP, Beta-Glucan, Dipotassium Glycyrrhizate, Tocopherol, Ascorbic Acid, Ascorbyl Glucoside, Tocopheryl Acetate, Hydroxypropyl Cyclodextrin, Ubiquinone, Thioctic Acid, Potassium Hydroxide, Behenyl Alcohol, Carbomer, Xanthan Gum, Disodium EDTA

 

Notes: Ingredients subject to change at manufacturer's discretion. For the most complete and up-to-date list of ingredients, please refer to product packaging.

 

For more information please read full disclaimer here.

Shipping & Collection

Standard Delivery: £3.99 (2-3 working days)

Free Standard Delivery: On orders over £30 (2-3 working days)

First Class Delivery: £5.50 (1-2 working days)

Portsmouth Local Delivery (PO1-PO6): £5.50 for same-day delivery (order by 1PM).

Free Collection from Kosmobox store: 1 Albert road, Southsea PO5 2SE

Please check our Return & Refund policy.

  • Free shipping for UK order over£30

  • Free samples with every order

  • Free collection from store