Tetra C Serum

A dermatologist-developed serum with active vitamin C in the form of an emulsion that is quickly absorbed. It has an anti-aging and brightening effect.
99,00 zł
za 3 dni robocze u Ciebie
14 dni na zwrot
Składniki INCI
Aqua, Ascorbyl Tetraisopalmitate, Glycerin, 1,2-Hexanediol, Acacia Senegal Gum, Squalane, Hydrogenated Polydecene, Polyacrylate Crosspolymer-6, Tocopheryl Acetate, Oryza Sativa Bran Oil, Macadamia Ternifolia Seed Oil, Crocus Chrysanthus, Hybrid, Panthenal Extract, Panthenal Bulb, Allantoin, Panthenalonic Bulb Acid, Olus Oil, Sodium Hyaluronate, Caprylyl Glycol, Silanetriol, Butylene Glycol, Dimethicone, Tocopherol, Citric Acid, Phenoxyethanol, Sorbic Acid, Hydroxyacetophenone, Potassium Sorbate, Sodium Benzoate, Parfum.
Składniki aktywne
  • ascorbyl tetraisopalmitate: lightens discoloration, brightens the complexion, has antioxidant properties
  • crocus tuber extract: improves skin elasticity and firmness
  • rice oil and squalane: regenerate and strengthen the skin barrier
  • macadamia oil: smoothes and replenishes lipids
  • allantoin and panthenol: soothe and accelerate regeneration
Delivery costs

DHL courier: 15 PLN

Free delivery from 299 PLN


14 dni na zwrot

Tetra C Serum

Tetra C Serum

99,00 zł
Tetra C Serum Ph.Doctor

Product details

The product has a multi-tasking effect. It moisturizes, evens out skin tone, lightens hyperpigmentation and has an anti-aging effect. Vitamin C in the form of ascorbyl tetraisopalmitate is stable and well tolerated even by sensitive skins. It has an antioxidant effect and protects against environmental pollutants. It has 88% ingredients of natural origin. The product is vegan.

Suitable for pregnant and breastfeeding women.


Moisturized, brightened, soothed skin. Reduced skin redness and signs of fatigue. Regular use lightens discolorations and prevents the appearance of new ones.

Tetra C Serum Ph.Doctor


  • Designed for all skin types
  • Tired and dull skin that lacks radiance
  • Skin with light discoloration
  • Anti-wrinkle


Apply 3 to 5 drops to the face and neck in the morning and evening. Once the product is absorbed, use a Ph.Doctor moisturizer.

Do an allergy test before using the product for the first time. More at Your Ph.Doctor: Allergy test - how to do it.

Tetra C Serum Ph.Doctor

Good to know

Our serum is a synergy of 3 ingredients:

Vitamin C + crocus extract + non-inflammable form of hyaluronic acid.

Ascorbyl tetraisopalmitate is:

  • The most expensive and one of the most effective forms of vitamin C.
  • It is effective even at low concentrations.
  • It acts as a precursor to vitamin C. Due to its fat solubility, it is highly bioavailable and penetrates deep into the epidermis. It shows high affinity for the lipid barrier of the epidermis.
  • It does not require a low ph for its effectiveness, making it suitable for sensitive complexions and during dermatological therapies. It does not irritate or flake the skin.

Research shows that:

  • A 3% concentration of ascorbyl tetraisopalmitate used 2x daily for 3 weeks lightens discolorations caused by sun exposure.
  • It prevents the appearance of new hyperpigmentation by blocking the enzyme responsible for pigment production - tyrosinase. Thus, it is a so-called tyrosinase inhibitor. It acts on the initial stage of melanogenesis.
  • It has a protective effect on your skin. It helps fight free radicals. So it is an ideal antioxidant product under sunscreen. Increases the degree of UV protection.
Tetra C Serum Ph.Doctor

Crocus tuber extract from a special variety of cream beauty in our serum we used a 2% concentration of DERMCOM containing this extract in its most effective form. This ingredient stimulates growth factors that act as a transmitter and allow communication between the cells of the epidermis and dermis. By this mechanism, it acts on fibroblasts in the dermis.

Research shows, that

  • After 28 days of use 2x daily, crocus extract increases skin elasticity by 13% and the amount of collagen by 115%.
  • It stimulates the secretion of growth factors such as: FGF-5, FGF-7, connective tissue growth factor, and insulin-like growth factor binding protein 6 (IGFBP6).

Epidermosil is a combination of low-molecular hyaluronic acid and silanetriol:

  • Nullifies the possible pro-inflammatory effects of hyaluronic acid. Studies show the absence of pro-inflammatory cytokines after application to the skin.
  • Has an effect on faster epidermal regeneration.
  • More effective in epidermal regeneration than hyaluronic acid alone (*studied as an indicator of the presence of ki-67 antigen)

Tested product

Based on our consumer research:

  • Beautifies skin according to 100%
  • Evens out skin tone and restores radiance according to 94%
  • Reduces signs of fatigue according to 88.9%
  • Gives a feeling of tightened skin according to 100%

Customer Reviews

Based on 603 reviews
Honorata Ż.
Serum Tetra C

Strasznie zapycha :(

wioleta s.
pozytywny na 10 punktów

polecam bardzo Tetra C serum skóra promienna zdrowsza cała twarz jaśniejsza miałam troszkę przebarwień wszytsko ładnie się rozjaśniło. Dla mnie najlepsze serum polecam bardzo

Agnieszka B.

Świetny produkt! Skóra widocznie się poprawiła po zmianie pielęgnacji na Ph doctor! Jestem zachwycona i zamawiam kolejne produkty dla przyjaciółki i mamy ❤️ Polecam!

Justyna B.
W końcu witamina C, która nie szkodzi

Próbowałam już wiele serum z witaminą C z tej półki cenowej i żadne mi nie pasowało. Po prostu szkodziło zamiast pomagać. To jest wspaniałe, właśnie kończę 1 opakowanie i za chwilę zamawiam drugie. Minus za opakowanie, bo nie widzę ile zostało mi produktu :(

Bardzo dobry produkt

Polecam to serum, zamawiam kolejne opakowanie.