Purity, percentage and pH level can affect the performance of a vitamin C product.  But most importantly, a vitamin C product must be absorbed by the skin to be truly effective.

Studies show that an effective topical vitamin C product must meet the following criteria:

Does the product contain pure L-Ascorbic Acid?

Vitamin C is L-ascorbic acid.  Even though they can claim to be vitamin C, other ingredients like magnesium ascorbyl phosphate or ascorbyl palmitate are not vitamin C and are not recognized as vitamin C by the body. Studies show that these other ingredients do not significantly increase levels of vitamin C in skin.

Is there enough Vitamin C for the product to work? 

Studies show a topical vitamin C product must have a substantial amount of vitamin C to have an effect, and a proven range for vitamin C efficacy is between 5% and 25% while 20% is optimal for absorption.

Is the pH low enough to allow absorption? 

To be absorbed by the skin, the pH of topical vitamin C must be very low - between 2 and 3.5 pH level. As the pH is increased, less vitamin C is absorbed.

What are the Benefits of Topical Vitamin C?

  • More concentrated than nutritional Vitamin C
  • Rapidly absorbed so it won’t rub or wash off
  • Greater penetration to the epidermis and dermis, greater benefit
  • Neutralizes free radical damage caused by UV light, smoke, and air pollution
  • Allows skin cells to remain healthy and able to perform their necessary functions
  • Enhances the protective barrier function of the skin
  • Helps moisturize and increase skin hydration
  • Promotes collagen production
  • Restores elasticity
  • Prevents premature skin aging
  • Protects against damaging UVA and UVB rays
  • Reverses the appearance of photoaging
  • Decreases fine lines and wrinkles
  • Lightens and brightens the skin for more even tone
  • Fades brown spots
  • Helps reduce oiliness and restore sebum balance
  • Helps to normalize problem skin (pimples, blackheads, and other problems associated with oily skin)
  • Reduces inflammatory
  • Boosts the efficacy of sunscreen actives
  • When combined with sunscreen, can enhance the power of sunscreens
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