Niacinamide (Vitamin B3)

Niacinamide (Vitamin B3) is one of O COSMEDICS’ Core Four Functional Actives, chosen for its unmatched ability to support skin health on multiple layers while remaining beautifully tolerable for most skins. Biomimetic by nature, it communicates directly with cellular pathways linked to immunity, barrier strength, pigment regulation, and oil flow making it one of the most intelligent, well-rounded ingredients in modern cosmedical skincare.

Benefits For The Skin

  • Supports barrier repair by stimulating lipid synthesis, helping reduce water loss (TEWL)
  • Regulates melanin transfer to visibly brighten uneven skin tone
  • Helps rebalance sebum production and reduce congestion and breakouts
  • Supports immune function by improving immune cell health (Langerhans cell)
  • Helps reduce visible inflammation and redness by supporting pH balance
  • Encourages smoother texture by activating natural desquamation enzymes (natural exfoliation)
  • Supports a stronger, more resilient skin barrier

Form, Stability & Delivery

Niacinamide is a highly stable water-soluble vitamin, making it exceptionally versatile in serums, cleansers and hydrators. Its stability ensures consistent performance without oxidation.

Because it aligns with O’s biomimetic technology, Niacinamide works harmoniously within the liquid crystal and encapsulated delivery systems used throughout the range helping it reach the cells that need it most with minimal irritation.

How Niacinamide (Vitamin B3) Works - Made Simple

Niacinamide helps the skin function to absolute best ability. It does this by supporting:
1. Barrier Strength & Lipid Production
Niacinamide encourages the skin to produce its own protective lipids, helping improve hydration retention and overall barrier function. A stronger barrier means calmer more stable and healthier skin function.

2. Pigment Transfer Regulation
Rather than resurfacing built-up pigmented skin cells or blocking tyrosinase, Niacinamide works by slowing the movement of melanin (pigment) from the melanocyte to surrounding skin cells helping reduce the appearance of dark spots and surface discolouration.

3. Immune Support & Redness Reduction
Niacinamide supports Langerhans cell function the “security guards” of the epidermis helping improve skin resilience and reducing the look of inflammation-driven conditions such as redness, sensitivity, acne- and rosacea-prone skin conditions. It also helps maintain a healthier pH balance, which in turn assists in regulating pigment activity and reducing the presence of unwanted surface bacteria.

4. Sebum Balancing & Breakout Reduction
By supporting both pH and immune function, Niacinamide helps reduce the conditions in which C. acnes thrive, while balancing excess sebum, ideal for congestion-prone, oily, or acne-prone skins.

5. Smoother Texture
Niacinamide activates natural chymotryptic enzymes, supporting a clearer, smoother surface as the skin naturally sheds redundant cells without harsh exfoliation.

Products with this ingredient

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