Ingredient Functions

Tyrosinase Inhibitors

Tyrosinase inhibitors are ingredients that help prevent dark spots from forming or getting worse. During the skin's healing process, it has a tendency to over-produce melanin (especially in PoC). This usually means we have a dark spot left over after a pimple is gone, even if you didn't touch it.

Ingredients with tyrosinase inhibition properties are able to go in and slow down this overproduction of melanin so you don't have to deal with dark spots as much.

Popular Tyrosinase Inhibitors
  • Kojic Acid

  • Vitamin C

  • Hydroquinone

  • Licorice Extract

  • Mulberry Extract



Comedolytics are ingredients that help to exfoliate the skin whether at the skin's surface level or within the pore. Early stages of a breakout always point to a clog within the pore, generally by sebum, skin cells or a combination of the two. What comedolytics do is gently break up those microscopic clogs to prevent a breakout from forming in the first place.

Popular Comedolytics
  • Glycolic Acid

  • Lactic Acid

  • Salicylic Acid

  • White Willow Bark Extract

  • Enzymes

  • Retinoids


Sebum Regulators

Sebum regulators are ingredients that help to regulate the skin's oil levels either through affecting the skin function or adding hydration back into the skin. An over-production of oil is a common issue amongst acne prone individuals and it can be due to the general mis-function of the skin or due to dehydrated skin. 

There are both hydrating ingredients and ingredients that are able to directly impact the skin's sebum production levels. Ultimately, both can help reduce the over-production of oil in different ways.

Popular Sebum Regulators
  • Niacinamide

  • Hyaluronic Acid

  • Sodium Ascorbyl Phosphate

  • Green Tea Extract

  • Ceramides



Antibacterial ingredients are those that can fight bacteria, but at ROSEN we like to focus on those proven to fight acne causing bacteria- p Acnes. The p Acnes bacteria naturally occurs within the pores, however, it can create a biofilm that leads to clogged pores thus initiating a breakout to form. Additionally, once there is enough sebum buildup within a pore, the pore ruptures under the skin allowing both sebum and p Acnes bacteria to seep out of the pore and into the skin barrier. Once p Acnes leaves the pore and enters the skin barrier, an infection is formed which is why larger bumps will be more inflamed and painful.

Certain antibacterials will fight acne causing bacteria, slowing the growth of the bacteria and maintaining it at normal levels.

Popular Acne Fighting Antibacterials
  • Zinc Oxide
  • Lemon
  • Passionfruit
  • Mulberry Extract
  • Licorice Extract
  • Benzoyl Peroxide
  • Lemongrass
  • Apple Cider Vinegar
  • Clindamycin



Anti-inflammatory ingredients are those that work to reduce inflammation within the skin barrier. Modern research shows that the early stages of a breakout tend to trace back to internal inflammation within skin cells. Additionally, we know that secondary (often the first time we notice it) inflammation occurs with larger pimples after an infection has formed beneath the skin's surface. 

With Anti-inflammatories, we can begin to work to target the root cause of a breakout as well as the secondary inflammation we see with larger bumps.

Popular Anti-Inflammatory Ingredients
  • Vitamin C
  • Niacinamide
  • Sodium Ascorbyl Phosphate
  • Probiotics
  • Mulberry Extract
  • Rose Hip Oil
  • Retinoids